U-boat Archive - U-boat KTB - U-106 2nd War Patrol

U-106 - 2nd War Patrol

Translation by Jerry Mason with help from Andi Forster

Departed	Date	Arrived	Date	Days at Sea
Lorient	26 February 1941	Lorient	17 June 1941	112

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Ships Hit
Date	KTB Time	Position	Ship	Tons	Nationality	Convoy
11 Mar 41	15.46	20°39'N, 20°57'W	MEMNON	7,506	British
16 Mar 41	16.36 - 16.37	13°27'N, 20°15'W	ALMKERK	6,810	Netherlands
17 Mar 41	21.07 - 21.10	16°03'N, 20°51'W	ANDALUSIAN	3,082	British	SL-68
17 Mar 41	21.07 - 21.10	16°03'N, 20°51'W	TAPANOELI	7,034	Netherlands	SL-68
20 Mar 41	23.23	20°03'N, 25°57'W	HMS MALAYA (01) (damaged)	31,100	British	SL-68
20 Mar 41	23.23	20°03'N, 25°57'W	MEERKERK (damaged)	7,995	Netherlands	SL-68
24 Mar 41	22.58	17°33'N, 27°33'W	EASTLEA	4,267	British
30 May 41	00.36	16°45'N, 25°21'W	SILVERYEW	6,373	British
31 May 41	03.13 - 03.34	16°45'N, 25°31'W	CLAN MACDOUGALL	6,843	British
6 Jun 41	05.03	17°27'N, 30°09'W	SACRAMENTO VALLEY	4,573	British

			Total = 85,583
Note: The positions in the table above and in the Google Earth patrol summary are derived from the KTB and in many cases do not match those set forth in authoritative references such as Jürgen Rohwer, Axis Submarine Successes of World War Two or the Uboat.net website. The goal here is to present the picture relative to the U-boat and not the absolute position that the ship was attacked or sank.












		K r i e g s t a g e b u c h
		= = = = = = = = = = = = = = = =
		of
		U n t e r s e e b o o t e s "U 106"
		= = = = = = = = = = = = = = = = = = = = = =

		2nd Patrol.

		Beginning: 11.2.1941
		Ending: 17.6.1941.




	Kommandant: Kapitänleutnant O e s t e n.


	Distribution:	2 x O.K.M. Skl.
		1 x B.d.U. Op.
		1 x B.d.U. Org.
		1 x 2.U.-Flottille
		1 x Boot.
20.06.41 Drafted.




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Click the flag to view the above page from the original German KTB

- 1 -



	1941
	11.02. - 24.02.41	Lorient	Shipyard overhaul.
	24.02. - 26.03.41	Lorient	Fitting out, fuel- torpedo- and provisions loading.
	26.02.41	Lorient
	17.00		Put to sea for 2nd war patrol from Lorient. Up to Point II off Lorient with escort.
	19.08	Isle de Groix	Dived, to wait for darkness.
	20.00	BF 6184
	20.46 14.00	BF 6443 upper-right	Surfaced. Because of malfunctions in the gyrocompass installation steered by magnetic compass and deviated to sea on the ordered departure route to remain off the coast.

	27.02.41	Bay of Biscay
	04.00	BF 6714	Passed 13 fishing boats with running lights.
	08.00	BF 5858
	12.00	BF 8233	Day's run: Surfaced 184.0 nm
			Submerged 3.5 nm = 187.5 nm.
	16.00	BF 8245	1 bridge petty officer broke his right arm by an overcoming sea.
		SSW 5-6, Sea 5
	20.00	BF 8191
	24.00	BF 8412

	28.02.41
	04.00	BF 7637
	08.00	BF 7648
	10.36		Sent passing report 9°W.
	12.00	BF 7589	Day's run: Surfaced 196 nm.
	14.00		Dived. Test dive.
	14.33		Surfaced.
	16.00	BF 7842
	20.00	CG 2211
	24.00	CG 2168

	01.03.41	West of Spain
	04.00	CG 2434
	08.00	CG 2485
	12.00	CG 2741	Day's run: Surfaced 185.5 nm
			Submerged 3.5 nm = 189.0 nm.

	Sun and Moon Data 26.02.41
	Sun and Moon Data 27.02.41
	Sun and Moon Data 28.02.41
	Sun and Moon Data 01.03.41

- 2 -



	continued
	01.03.41	West of Spain
	13.00		Clocks set back 1 hour. Time in M.E.Z. [GMT +1]
	16.00	CC 4336
	19.00		Clocks set back 1 hour. From now time in M.G.Z. [Central Greenwich Time = Universal Time = GMT + 0]
	20.00	CG 5415
	20.58	CG 5419	Steamer with set navigation lights in sight. Portuguese on course 250-260°. Unsuspicious, ran after.
	22.22		Turned away.
	24.00	CG 5472

	02.03.41	Southwest of Spain
	01.15	CG 5476	A small Spanish freighter and passenger freighter in sight bearing 230°T. Course 10° (for Vigo?). Markings and flag well illuminated. Approached to within 400 meters, unsuspicious.
	08.00	CG 8123
	08.33	CG 8131	Dived. Spanish steamer "CABO ESPARTEL" on course 20-25°. Appearance corresponds to the name. Unsuspicious.
	10.07		Surfaced.
	12.00	CG	Day's run: Surfaced 240.0 nm
			Submerged 3.5 nm = 243.5 nm.
	16.00	CG 8551	Because I have enough time before supplying, I go a little bit farther to the east off the Strait of Gibraltar possibly to find something there.
	20.00	CG 8598
	24.00	CG 8681

	03.03.41	Southwest of Spain
	04.00	CG 8954
	08.00	DJ 1333
	12.00	DJ 1381	Day's run: Surfaced 268.0 nm
	16.00	DJ 1568
	18.04	DJ 1588	Smoke trail bearing 188°T. A steamer apparently on a southerly course.
	18.12		Another steamer bearing 136°T. Because it is closing, maneuvered ahead.
			Steamer steers 45° and sets navigation lights. Spanish freight and passenger ship "CIUDAD-Class" or "DOMINE". Course goes from Teneriffe for Cadiz, unsuspicious.
	24.00	DJ 1822

	04.03.41
	04.00	DJ 1847
	[illegible entry]	[illegible entry]	Steamer in sight. Course [remainder of entry illegible]

	Sun and Moon Data 01.03.41
	Sun and Moon Data 02.03.41
	Sun and Moon Data 03.03.41
	Sun and Moon Data 04.03.41

- 3 -



	continued
	04.03.41
	08.00	DJ 4129
	09.12		Surfaced. Ship examined carefully in the periscope.
	10.25		Dived.
	12.00	DJ 4146	Day's run: Surfaced 268 nm
			Submerged 3.4 nm = 271.4 nm.
	12.55	DJ 4172	Crash dive. Aircraft, probably "Vickers Wellington", possibly "Douglas" (Spanish).
	13.53		Surfaced. At "NORDMARK" a radio message was later seen which was:
			Radio Message 1312/13 All 20-21:
			French aircraft report: 4 March in 31°30'N 12°15'W surfaced U-boat . . . . . . etc.
	16.00	DH 6391
	20.00	DH 6621
	24.00	DH 6593	This boat was certainly "U-106".

	05.03.41
	04.00	DH 6856
	02.00	DH 9243
	12.00	DH 9432	Day's run: Surfaced 261.8 nm
			Submerged 3.0 nm = 264.8 nm.
	16.00	DH 9183
	20.00	DH 9188
	24.00	DH 9462
		Off Las Palmas

	06.03.41	Off Las Palmas, Roads
			The beacons of the approach stand out well, "CORRIENTES" is easy to find.
	01.00	Las Palmas Roads	Made fast alongside "CORRIENTES". Boat lies well. Fenders and lines are correctly delivered, moderate swell.
	01.15		Transfer begins, 50 cbm fuel oil, lubricating oil and fresh provisions. Delivery was well prepared and went smoothly.
	05.05		Cast off.
	05.46		Short signal sent: Supply completed.
	07.15	DH 9435	Dived before Spanish coastal steamer, heading from the north to Las Palmas.
		It is bright.
	08.00	DH 9435
	10.29		Surfaced.
	11.25		Radio Message 0938/6/149: B.d.U. to Southern boats:
			"U-106" transit to the south on 22°W.
	12.00	DH 9277	Day's run: Surfaced 125.7 nm
			Submerged 7.3 nm = 133.0 nm.
	16.00	DH 9192
	20.00	DH 9158
	24.00	DH 9147

	Sun and Moon Data 04.03.41
	Sun and Moon Data 05.03.41
	Sun and Moon Data 06.03.41

- 4 -




	07.03.41	West of Africa
	04.00	DH 8329
	08.00	DH 8312
	12.00	DH 8229	Day's run: Surfaced 184.5 nm
	16.00	DH 8245	To the south a convoy is reported by ship-based battleship aircraft. [SCHARNHORST and GNEISENAU]
	20.00	DH 8167	U-124 and U-105 gain contact quickly and attack. Am operating on the convoy in the hope that a boat maintains contact.
	24.00	DH 8177	Convoy is still located about 600 nm to the south of me.

	08.03.41
	04.00	DH 8177
	08.00	DH 7682
	12.00	DH 7951	Day's run: Surfaced 199.5 nm.
	13.55		Dived. Test dive.
	14.14		Surfaced.
	16.00	DH 7981
	16.29		Radio Message 1817/9/129: To Southern boats:
			Report position. B.d.U.
	17.26		Short Signal: Position DT 33. U-106.
	20.00	DT 3351
	24.00	DT 3387

	09.03.41
	04.00	DT 3658
	08.00	DT 3929
	12.00	DT 3997	Day's run: Surfaced 189.0 nm
			Submerged 1.2 nm = 190.2 nm.
	12.47	DT 3997	U-124 in sight. Leaves me information about the convoy, I deliver a paper from the Flottilla to him (G-publications). Because we are located on the presumed latitude of the convoy, I go to the west, while he continues to run on a northerly course.
	16.00	DT 3997
	19.22		Radio Message 2048/9/164: To U-105, U-106:
			If there is no enemy contact by nightfall U-105 on 20°W, U-106 on 21°W proceed to Freetown area. Orders concerning supply to follow. B.d.U.
	20.00	DT 3873
	24.00	DT 6113

	Sun and Moon Data 07.03.41
	Sun and Moon Data 08.03.41
	Sun and Moon Data 09.03.41

- 5 -




	10.03.41
	04.00	DT 6146
	08.00	DT 6513
	12.00	DT 6554	Day's run: Surfaced 179.5 nm
	16.00	DT 6586
	20.00	DT 6937
	24.00	DT 6895

	11.03.41
	02.09	DT 9232	Small steamer in sight with navigation lights and Spanish markings, course 45°. Pursued, inspected closely, could find nothing suspicious.
	04.00	DT 6899	Apparently CIUDAD-Class. Freight and passenger ship.
	04.32		Came to old course.
	08.00	DT 9236
	12.00	DT 9268	Day's run: Surfaced 150 nm.
	14.25	DT 9298	Bearing 170°T a steamer heavily zig-zagging on apparent general course north. Positioned ahead on general course.
	14.48		Dived.
	15.46	DT 9292	1st shot. 1 G7e, target speed = 13 knots, target angle 60°, range = 600 meters, hit after 25 seconds.
		W 4-5, Sea 3-4, Vis. good
			2nd shot. 1 G7e, target speed = 13 knots, target = 90°, range = 500 meters, hit after 46 seconds.
			Both hits aft, speed was greater than 13 knots.
			English, Blue Funnel Line "MEMNON" 7506 GRT. Name located on the bow. Appearance checks. Stern cannon. Ship sinks in 15 minutes over the stern.
	15.56		Surfaced. 4 boats are in the water.
			Radio Message was not observed after surfacing.
	16.00	DT 9292
	20.00	DT 9533
	24.00	DT 9561

	12.03.71
	04.00	DT 9591
	08.00	DT 9831
	12.00	DT 9835	Day's run: Surfaced 136 nm
			Submerged 4 nm = 140 nm.
	16.00	EJ 3261
	18.19		Dived. Test dive.
	18.44		Surfaced.
	20.00	EJ 3286
	24.00	EJ 3561

	Sun and Moon Data 10.03.41
	Sun and Moon Data 11.03.41
	Sun and Moon Data 12.03.41

- 6 -




	13.03.41
	04.00	EJ 3594
	08.00	EJ 2834
	12.00	EJ 3897	Day's run: Surfaced 154.0 nm
			Submerged 1.3 nm = 155.3 nm.
	16.00	EJ 6261
	20.00	EJ 6294
	24.00	EJ 6534

	14.03.41
	04.00	EJ 6591
	07.33		Radio Message 0754/14/193:
			Attack areas off Freetown, U-105 south, U-106 north of a line from Cape Sierra Leone in direction 55°. According to an unconfirmed report, ships frequently wait at night inside the 200-meter line, which a heavy cruiser patrols. Both boats remain off Freetown until about 21 and supply about 25 March at Point Red. Further orders follow. B.d.U.
	08.00	EJ 6834
	12.00	EJ 6867	Day's run: Surfaced 151.0 nm.
	16.00	EJ 9261
	20.00	EJ 9531
	24.00	EJ 9537	Change course for Freetown. Turn point and course is the most promising according to received documents.

	15.03.41
	04.00	EJ 9659
	08.00	EK 7477
	11.45	EK 7722	A convoy comes out of the haze in direction 180°, 12-15 ships high out, am positioned to starboard abeam of the convoy. 1 "JAVELIN" destroyer ahead to starboard. Convoy course approximately 240°, speed 7 knots.
		NE 3, Sea 2-3, hazy
	12.00	EK 7732	Day's run: Surfaced 197.5 nm.
	12.41		Radio Message 1419/15 To B.d.U.:
			Convoy square EK 7728, westerly course. U-106.
			Nothing heard from headquarters; however, because U-105 has certainly received the Radio Message, I do not, as in later cases, resend.
		Haze/dust zone (according to monthly chart)	I maneuver ahead of the convoy on a westerly course. Contact keeping is complicated by exceptionally unpleasant haze. The haze lies during day and night about a hand's width above the horizon, in the direction of the sun [last line of the entry is illegible]

	Sun and Moon Data 13.03.41
	Sun and Moon Data 14.03.41
	Sun and Moon Data 15.03.41

- 7 -



	continued
	15.03.41
	14.00	Heavily changing visibility conditions	Convoy turns behind me on a northerly course. I am positioned on the port side. Convoy crossed behind me. See 1 2-stack destroyer old type and a big yellow auxiliary cruiser (port astern sweeper).
	15.00		The visibility becomes better suddenly. Am positioned very close, all ships of the port side are high out. Attempt to move off at high speed. (I want to maintain my position and not risk losing contact by diving.)
	15.06	EK 7715	Artillery fire by auxiliary cruiser. 4 covering impacts! Crash dive.
			My belief, that I would be difficult to detect in the haze was evidently wrong. The advantage of the high bridge is particularly striking with the changing visibility and long swell.
	16.00	EK 7714
	16.44		Surfaced. Convoy out of sight.
	18.15		Convoy again in sight, steering northerly course.
	19.40		Radio Message 2110/15/139: To B.d.U.:
			Convoy square EK 7473, upper-left, northerly course, 2 destroyers. U-106.
	20.00	EK 7447	In the brief twilight convoy was lost for a short time. After moonrise regained contact, it steers a NW-course.
	21.31		Radio Message 2323/15/141: To U-106:
			Hold on, to bring up U-105. B.d.U.
			In other words, do not attack. Attack is hopeless in the bright moonlight on the surface, submerged because of quite high swell also not very promising.
	22.14		Radio Message Alpha Alpha 369 2356/15/143:
			Convoy in sight square EK 7743, 0°, 7 knots. U-106.
			Convoy changes course every 2-3-hours about 20-30°, hold contact, come well ahead by changes of course of the convoy from his port side to the starboard side. Far ahead a destroyer runs large legs [back and forth across the convoy's course].
	24.00	EK 7413

	16.03.41
	00.19		Radio Message Alpha Alpha 880 0306/16/148:
			Enemy steers 30°, screen positioned ahead. U-106.
	04.00	EK 7183
	04.55		Radio Message Alpha Alpha 221 0640/16/154:
			Enemy steers northerly course. U-106.
			In fact the [remainder line -illegible]

	Sun and Moon Data 15.03.41
	Sun and Moon Data 16.03.41

- 8 -



	continued
	16.03.41
			04.40 hours on NW. Now intend to attack submerged in the morning twilight, am positioned exactly ahead of the convoy and will allow him to come up.
	06.00		Dived.
			In the periscope only a destroyer, making large legs, steers improbable courses, but does not get closer. From the convoy only the auxiliary cruiser occasionally still in sight.
	07.34		Surfaced. Convoy had zigzagged off, not in sight, it has probably stopped for a time to allow a straggler to catch up.
	08.00	EK 7143
		NE 5, Sea 4-5, long swells, on top of it short steep seas, unusually heavy for the tradewinds
	08.25		Contact on the convoy again, am positioned to port astern, steering a NW-course again.
	09.07		Radio Message 1056/16/162:
			Square 4724, northwesterly course. U-106.
			That square must mean 7124.
	09.40		Crash dive.
			Forced to submerge by destroyer.
	09.54		Surfaced.
	09.56		Crash dive. The haze has come up again, I am positioned too close, must let now the whole convoy pass me. Distance is too great to reach a shooting position. I see on the port side forward 1 destroyer (2-stack) in the center still another destroyer (2 stack) and to port astern 1 gun boat (HALCYON?). The "JAVELIN" must therefore be positioned on the starboard side. Convoy drives in 3 columns each of about 10 steamers. In the center between the steamers with heavily changing speed settings, (determined by sound observations) "MALAYA".
	11.51		Surfaced. Positioned to port behind the convoy.
	12.00	EK 7114	Day's run: Surfaced 197.5 nm
			Submerged 14.7 nm = 212.2 nm.
	14.00		Radio Message 1546/16 to B.d.U.: Convoy position square EJ 6993 present today "MALAYA" and 2 additional destroyers. U-106.
			Radio message was not heard by headquarters, can not be expected during the daytime. The main thing is that U-105 received it.
			Ran ahead on the port side of the convoy.
	16.00	EJ 6983
	16.10		In direction 180°T, 1 steamer in sight on course 350°. Am positioned between the steamer and the convoy. Because I must submerge anyway, I can also immediately shoot the single steamer, he lies exactly towards me.
			In my opinion, he has nothing to do with the convoy, although he is on course to it. He steers on 21° W.
	16.14		Dived.

- 9 -



	continued
	16.03.41
	16.36		1st shot: range = 500 meters, target angle = 90°, target speed 14 knots.
			Hit aft of the bridge after 27 seconds = 405 meters.
	1637		2nd shot: range = 500 meters, target angle = 110°, target speed 14 knots.
			Hit forward of the bridge after 46 seconds = 690 meters.
			Steamer is Dutch "ALMKERK" 6810 GRT. Cannon astern. Sinks in about 15 minutes over the stern.
	16.58		Surfaced.
	16.58		Crash dive. Artillery fire. Had not seen our special friend, the big yellow auxiliary cruiser in the haze and swell in the periscope. Unfortunately, my hope that he will go to the scene of the "ALMKERK" disaster and come within shooting range does not come true. He remains very cautious with continuous changes of course at great distance. The destroyers also remain so, in this case, probably because of the "MALAYA" with the convoy.
	17.54		Surfaced. Pursued. Contact on the auxiliary cruiser. From "ALMKERK" 3 boats float. Although the convoy saw the downing, it does not risk allowing him to take the boats.
	20.00	EJ 6953	Follow the auxiliary cruiser on northerly courses, he makes constant legs so that I assume he is on one side of the convoy. Nothing is seen of the convoy itself. I lose contact during the brief twilight (20 minutes). Possibly he has also increased speed. I then realize I have been drawn off by deceptive course.
	20.18		Radio Message 2207/16/184: U-105 reports by Short Signal "Yes". B.d.U.
			Therefore "U-105" has contact and our messages were not in vain.
	20.28		Radio Message 1825/16/172: To U-105, U-106:
			Attack, hang on. B.d.U.
	20.37		Radio Message 2226/16/185: To Southern Boats:
			Attack, U-105 serve as contact keeper if "U-106" does not have contact. B.d.U.
			Because now with darkness I have little prospect of finding the convoy again and possibly have been set off by the auxiliary cruiser far from the real convoy I report:
	21.37		Radio Message 2305/16/187: Forced off. Position EJ 6934. U-106.
	22.22		Radio Message 2354/16/190: Convoy square EJ 6925 with course 0°. U-105.

- 10 -




	17.03.41		[handwritten entry] Operating on the basis of U-105 report.
	00.00		Because I still have nothing in sight, navigation differences must be present. Take a good navigation fix on the moon horizon which shifts me 22 nm to the SW and, request bearing signals by Short signal.
	00.14
	02.49		Radio Message 04.30/17/195 Alpha Alpha 534:
			The correct position of the convoy is square 6657, course 340°, speed 7 knots.
			U-105.
	04.00	EJ 6678	So U-105 has also corrected his navigation.
	05.00		With the help of his bearing signals I get in contact again.
			[handwritten entry] So that "U-105" can cease bearing signals, send
	05.15		Radio Message 0712/17/198 Alpha Alpha 615:
			Have contact on reported enemy. U-106.
	08.00	EJ 6562
	08.42		Crash dive, approached too closely while getting ahead in the morning haze.
	09.13		Surfaced. Ran off, unseen.
			U-105 in sight. We are positioned ahead of the convoy to port.
	09.40		Preparatory talks held with U-105. It is decided to attack together from the west after the arrival of darkness before moonrise (about 23.30 hours). In case of lost contact by any one of the two boats report immediately. Contact holder then immediately gives bearing signals.
	12.00	EJ 6294	Day's run: Surfaced 195.8 nm
			Submerged 8.6 nm = 204.4 nm.
			The big yellow auxiliary cruiser patrols his post as sweeper very skillfully. The ship is painted white light yellow with yellow superstructure and stack, perhaps "AVELONIA STAR".
	14.56		Crash dive. Artillery fire. 4 salvoes. Central firing procedure. In my desire to keep the convoy in sight irrespective of the sweeper, I have approached a little bit too close. With the haze visibility improvement is unfavorable for me.
	15.17	EJ 6255	Surfaced. Convoy has shifted its course in about 2-3 steps changed his course from NW across N to NE.
	16.00	EJ 6252
	18.00		Hold contact on easterly course.
	20.00	EJ 3847	Radio Message Alpha Alpha 314 2209/17/119: Have lost contact. U-105.
			It is a pity, he probably did not notice the NE-leg.
	20.41		Radio Message 2217/17/120: U-105, U-106: As soon as situation permits, report fuel and position. B.d.U.

- 11 -



	continued
	17.03.41
			Here I have made a mistake, I have taken it for granted that U-105 also holds contact and no longer send running reports. It is always necessary to send contact reports at intervals, even if one can suppose that all boats are in contact.
	20.55		Radio Message Alpha Alpha 316 2246/17/122:
			Square EJ 3896. U-106.
			As I am attacking, I want to update the course information. Have difficulty with a destroyer on the port side center of the convoy who continually makes cross legs. Must pass him initially at 800 meters, then one more time at 600 meters.
	21.00		Positioned between the destroyer and the convoy.
			Intend initially bow then stern tubes.
	21.07		1st shot, range = 800 meters, target speed = 7 nm, target angle 90°. Hit after 58 seconds, 870 meters.
	21.08		2nd shot, hit after 25 seconds. Must turn hard from the next steamer to get free.
	21.09		3rd shot, hit after 2 minutes, 45 seconds (2500 meters) next column.
	21.10		4th shot, hit. Somewhat weaker detonation after 2 minutes 6 seconds
			Because I must run off due to the destroyers, I can no longer shoot stern torpedoes with certain data.
			In the convoy 1 hit with bright fiery glow another with only rockets and detonations.
			Rescue measures, lights observed in the boats and rockets perfectly from 3 ships. 4th hit not certain, because only weak detonation was heard in the boat. Because these were all big ships, I call it, 3 ships with together approximately 21000 GRT. 4th hit is possible. Nothing heard on the 600-meter wavelength.
	22.17		Radio Message Alpha Alpha 075 2350/17/124:
			Square 3892, course 40°. U-106.
			Have sent bearing signals on request from U-105. (Had not heard headquarters)
	23.45		Have only still the stern gun boat in sight. Haze makes contact keeping difficult.
	24.00	EJ 3891

	18.03.41
	01.00		Gun boat lost from sight, it probably runs after the convoy [ remainder of entry illegible]

	Sun and Moon Data 17.03.41
	Sun and Moon Data 18.03.41

- 12 -



	continued
	18.03.41
			after and search on various courses.
	01.23		Radio Message Alpha Alpha 925 0203/18/122:
			Have lost contact on reported enemy in square 3865. U-106.
	02.12		Radio Message 0324/18/130: To B.d.U.:
			130 cbm, 2 individual steamers 14316 BRT, from convoy 3 of about 21000 BRT, still 7 + 4 torpedoes. Position EJ 38. U-106.
	04.00	EJ 3852
	08.00	EJ 3595
	12.00	EJ 3641	Day's run: Surfaced 177.5 nm
			Submerged 1.3 nm = 178.8 nm.
	13.00		Dived. Test dive.
	14.07		Surfaced.
			Bow heaviness of the boat is continually growing stronger. A leak in ballast tank 8 to the chain locker is found to be the cause. Transverse rear bulkhead of the watertight bow is repeatedly torn.
			In the course of the day on various courses searching for the convoy.
	16.00	EJ 3387
	20.00	EJ 3358
	20.30		Radio Message 2119/18/154: U-105, U-106:
			If no enemy contact transit to the south. Orders concerning supply follow. B.d.U.
	21.00		Started transit to the south.
	24.00	EJ 3631
	19.03.41
	00.51		Radio Message Alpha Alpha 269 0240/19/160:
			Enemy convoy in sight square 3254, course 310°. U-105.
			Coung at highest speed on corresponding course.
	04.00	EJ 3264
	08.00	DT 9775
	11.06		Radio Message Alpha Alpha 136/1245/19: Not heard by headquarters.
			"Enemy convoy in sight square 9791, course 320°." U-105.
	12.00	DT 9762	Day's run: Surfaced 222.3 nm
		NNE 2-3, Sea 2-3, long swell, Vis. good	Submerged 2.3 nm = 224.6 nm.
	12.10		Contact on convoy, am positioned to starboard abeam, contact now held very easily on the clear horizon and good visibility. Fighting tops of "MALAYA" in sight.

	Sun and Moon Data 18.03.41
	Sun and Moon Data 19.03.41

- 13 -



	continued
	19.03.41
	14.17		Radio Message 1602/19/182: Convoy with "MALAYA" square DT 9751, northerly course. U-106.
	16.00	DT 9488
	17.51		Radio Message Alpha Alpha 663/1400/19/187:
			Have lost contact. Square 9794. U-105.
			Oddly that square lies south of his report from 12.45 hours DSZ.
	18.19		Alpha Alpha 435/2003/19/186: Square 8696 course 290°. U-106.
			Hopefully "U-105" succeeds in coming up before the evening.
	20.00	DT 8665	Am positioned to the east of the convoy. This position is necessary at beginning of twilight in the southern latitudes, because one has the target against the setting sun, then against the bright horizon. This facilitates closing at twilight. One must close the distance in 20 minutes to hold contact from 15 nm (clouds of smoke, mastheads, stacks) to 2 nm (silhouettes in the dark). The more forward of the convoy's position, the more favorable, because the convergence is better. Looking for more favorable shooting position.
	20.39		Radio Message 2155/19/193: To U-105, U-106:
			Attack, hold on.
			If necessary supply at "Culebra" will be ordered. B.d.U.
	24.00	DT 8654
		NE 1, Sea 1-2, Vis. good

	20.03.41
			Making a stern attack on large ship of the starboard side, due to the outer destroyer we get a bit far aft, target angle will be a bit blunt.
	00.10		Shot, range = 1200, target angle 100°, target speed 7 knots, miss or torpedo failure. New approach. Still have 2 bow torpedoes. Can not get closer in the good visibility and flat sea. Behind the destroyer, we can arrive at a shoot on well overlapping ships.
	01.24		2 shots, range = 1000 meters, target speed 7 knots, target angle = 110°, no success. The ships overlapped, so that a miss was unlikely. Shooting data was good.
	02.20	Moonrise	Radio Message Alpha 906 0406/20/200:
			Square 8644 enemy steers NW-course. U-106.
	04.00	DT 8566
	08.00	DT 8553

	Sun and Moon Data 19.03.41
	Sun and Moon Data 20.03.41

- 14 -



	continued
	20.03.41
	08.08		Radio Message 1004/20/104: Square 8546 enemy steers westerly course. U-106.
	12.00	DT 8439	Day's run: Surfaced 197 nm
	14.18		Radio Message 1608/20/113:
			Square 8447 enemy steers southwesterly course. U-106.
	16.00	DT 8447
	18.28		Radio Message 1811/20/2nd time not heard by headquarters.
			Square 8447 enemy steers northwesterly course. U-106.
			Positioned well ahead of the convoy.
	19.38		Dived. Test dive.
	19.48		Surfaced.
	20.00	DT 7652	Have 2 stern torpedoes in the tubes and 2 reserve stern torpedoes. Intend to attempt, reload, 2nd attempt.
			This evening the convoy drives in port echelon (about [illegible word]). By course changes have come to the NW from the starboard side to the port side of the convoy. I allow myself to be overtaken.
	22.49		Short Signal: Request bearing signals from contact keeper. U-105.
	22.54		Radio Message Alpha Alpha 653/2358/20/127: Have lost contact. U-105.
			I am positioned close ahead of the formation. See one section of steamers bow right, one section bow left.
	23.23		2 stern shots range = 1000 meters, target speed 7 knots, target angle 60°, hit after 2 minutes 37 seconds and 3 minutes 35 seconds. One hit on low silhouette, in the bright fiery glow it looks like a large tanker of about 8000 tons.
			2nd hit ship not made out. Guess at about 7000 GRT. "MALAYA", close by in the center of the steamers, was seen briefly, she may have been hit. I did not expect to find the battleship with the convoy at night.
	24.00	DT 7643

	21.03.41
	00.08		Radio Message Alpha Alpha 473/0158/21/129:
			Square DT 7646, enemy steering NE-course. U-106.
			Giving bearing signals for "U-105."
	00.45		Have reloaded, running for next attack. Detonation at the convoy, rockets from several steamers. So is U-105 at the convoy? Shortly afterwards wild starshell shooting begins from "MALAYA". At first it puts 2 large fans across my side, lay short, then other starshells and artillery [illegible few words]

	Sun and Moon Data 20.03.41
	Sun and Moon Data 21.03.41

- 15 -



	continued
	21.03.41
			Impacts are to starboard astern of me. Possibly meant for "U-105". In the convoy a strong white rocket is shot which disintegrates into many separate balls. Likely signal order for dissolution of the convoy.
	03.20	Moon comes up, very bright, calm sea	Convoy turns sharply to the east, I run after, have contact on a single ship. Pursue a large independent steamer, which drives through the area with wild zig zags at high speed. Can not reach a shooting position. Then he drives towards a destroyer who makes "r" with a searchlight. There several steamers which go wildly back and forth. Cannot reach a shooting position because of the moon and the calm water.
	03.49		Radio Message Alpha Alpha 056 0538/21/30:
			Have attacked. Have lost contact. U-105.
	04.00	DT 7653
	05.07		Radio Message Alpha Alpha 701 0702/21/30:
			Enemy assembles in DT 7664. U-106.
	05.47		Radio Message 07.21/21/132: To B.d.U.:
			Yesterday 3 misses, today 2 steamers of approximately 15000 GRT. Still 2 stern + 4 Torpedoes., 110 cbm.
			U-106.
	08.00	DT 7666
	08.56		Radio Message 1024/21/135:
		[Oe = Oesten]	From convoy "Oe" 5 steamers totaling 33000 GRT. Still 3 stern + 4 torpedoes, 80 cbm. Square 7625.
			U-105.
	10.40		Radio Message Alpha Alpha 723/1207/21/137:
			Square 8419, enemy steers NE-course. U-106.
			Running on the port side of the convoy. It has in the last 24 hours changes course nearly 180°.
	12.00	DT 8179	Day's run: Surfaced 204 nm
	16.00	DT 8153	Hold contact, positioned ahead of the convoy.
	16.39	DT 8137	Crash dived. Aircraft. The ship-based aircraft of the "MALAYA". Since the weather had become calmer, I had expected it.
	17.37		Surfaced.
	17.44		Crash dive. Aircraft still on the move. Convoy still seen in the periscope. Range is too great.
	20.00	DT 8134
		NE 1, Sea 0-1, Vis. good
	20.30		Surfaced. Pursued, have contact.
			Still have 2 stern torpedoes. Positioned to starboard ahead of the convoy. A large single ship runs quite far ahead. Probably an auxiliary cruiser, the forward escort is difficult for a stern approach. Visibility is good, water calm. Am lying stopped, with low speed on his course, [last line illegible]

- 16 -



	continued
	21.03.41
			slowly grows bigger.
	22.51	DT 5789	Double shot range = 1000 meters, target speed 7 knots, target angle 60°. Aim point before and behind the bridge. No success. Is unclear to me, because shot with good data. Believe failure.
	23.32		Radio Message Alpha Alpha 091 0111/22/156:
			Square 5788, northerly course. U-106.
	24.00	DT 5783

	22.03.41
	00.28		Radio Message 0212/22/157:
			Out of torpedoes below deck. No success.
			U-106.
			Hold contact on an independent steamer.
	04.00	DT 5752
	08.00	DT 5724
	08.38		Radio Message 0943/22/164 Officer-Only: To U-105, U-106:
			Good job. If weather situation allows reload torpedoes and hang on. Otherwise departure at most economical speed for ER 89. Report by Short Signal yes or no, if reloading. Report by Short Signal xyz, if in case of failure of supply in ER 89 transit back to "Culebra" at most economical speed is not guaranteed. B.d.U.
	10.07		Short Signal: "No." U-106.
			Believe that reloading in the weather conditions is not possible.
			Lets the steamer drive away with difficult hearts and come to a southerly course to the meeting place with NORDMARK and ship 41.
	11.00	DT 5476	U-105 in sight. Final meeting.
			Findings: Navigation is the main point in contact keeping.
	12.00	DT 5478	Day's run: Surfaced 150.7 nm
			Submerged 4.8 nm = 155.5 nm.
			One can not run without torpedoes in the tubes. Because it has become calmer, will try and reload, it goes better than expected.
	20.00	DT 4962
	22.00		4 torpedoes are unloaded from the canisters without major difficulties.
	24.00	DT 4964

	23.03.41
	04.00	DT 7323
	08.00	DT 7355
	12.00	DT 7384	Day's run: Surfaced 102 nm
	14.41		Dived. Test dive.

	Sun and Moon Data 21.03.41
	Sun and Moon Data 22.03.41
	Sun and Moon Data 23.03.41

- 17 -



	continued
	23.03.41
	16.00	DT 7568
	16.45		Steamer in sight, heavy zig zags, northerly general course.
	17.21		Dived to attack, making zig zag legs.
	18.15	NE 4-5, Sea 4-5, Vis. good	Shot G 7a range = 800 meters, target speed 12 knots, target angle 90°, missed.
			The ship had a sharp foredeck, therefore, may have underestimated speed. [days later] Saw the following Radio Message on "NORDMARK": 23 March 17.28 GMT SSSS "MALANCHA" reported miss by torpedo in DT 70.
			Because it was a G7a the ship may have avoided it.
	19.19 20.00	DT 7538	Surfaced. Pursued. Attempt at highest speed to approach for a night attack. Steamer runs at about 15 knots. I can not approach against the sea and swell.
	21.00		Steamer out of sight.
	22.25		Search broken off.
	24.00	DT 7297

	24.03.41
	04.00	DT 7558
	08.00	DT 7824
	12.00	DT 7793	Day's run: Surfaced 182.5 nm
			Submerged 6.0 nm = 188.5 nm.
	16.00	EJ 1163
	20.00	EJ 1431
	21.29	NE 2, Sea 2, Vis. good, no moon	Steamer bearing 230°T. At intervals of approximately 5-10 minutes the ship makes legs of 20-40° up to 4 times to the same side. I maneuver ahead, apparently has a northerly general course
	22.30		Run towards for attack. Steamer zigzags 20° toward. Therefore the attack was somewhat sharp, although the range was good.
	22.45		Steamer zigzags another 40° toward. Am positioned immediately on the courseline. Distance 500 meters. I must turn off with highest speed and hard rudder. The steamer probably sees the propeller wake, gives 3 short blasts with steam whistle and stops. I open range at slow speed running along his port side. Steamer goes again. I turn to the attack.

	Sun and Moon Data 23.03.41
	Sun and Moon Data 24.03.41

- 18 -



	continued
	24.03.41
	22.58	EJ 1425	Shot G 7a, range = 500 meters, target speed = 5 knots, target angle 90°. Hit in the amidships after 38 seconds. Steamer of about 5000 GRT. Typical English tramp. I just got him getting underway, he could run at 10-11 knots. Sinks in 10 minutes. 1 boat and raft are launched. As I am approaching the boat to determine the name, the boat slowly sinks, burning magnesium fire, crew shouts help in unison. I wanted to give the boat the course to Cape Verde, however, there is no longer any purpose.
			Came to old course. Steamer had transmitted SSSSS-report on short-wave (it is disrupted by us), it was only received by us with distortion.
	24.00	EJ 1428	From now will also switch to 36-meter wavelength during steamer hunts.

	25.03.41
	04.00	EJ 1484
	08.00	EJ 1746
	12.00	EJ 4112	Day's run: Surfaced 200.6 nm
	16.00	EH 6392
	19.15	EH 6634	A steamer on a NE-course in sight bearing 230°T. Large "Blue Funnel" zigzags off to the east. Distance requires diving. Assume an easterly general course.
	19.31		Dived. Steamer turns to the south, then southwest, must wait a while submerged. Can not reach a shooting position.
	19.55 21.00		Surfaced. Steamer heads south, because I have seen him steer from NE to SW, I assume a southeasterly general course. I proceed at highest speed on southeasterly course. Steamer comes nearby one more time on an easterly course. Still no shooting opportunity. Steamer runs about 16-17 knots. Can only gain ground when I run on the general course.
			Steamer no longer comes in sight, may have headed to the south and I have just seen the strong zigzags in the evening twilight.
	23.45		Hunt broken off.
	24.00	EJ 4712

	26.03.41
	04.00	EJ 4747

	Sun and Moon Data 24.03.41
	Sun and Moon Data 25.03.41
	Sun and Moon Data 26.03.41

- 19 -



	continued
	26.03.41
	12.00	EH 9386	Day's run: Surfaced 215 nm
			Submerged 1.5 nm = 216.5 nm.
	16.00	EH 9651
	20.00	EH 9918
	24.00	ER 3233

	27.03.41
	04.00	ER 3297
	08.00	ER 3555
	09.14		Radio Message 0929/27/105, Officer-Only: To U-105, U-106:
			"NORDMARK" and Ship 41 positioned on 29 March square ER 89. Leader supply Ship 41. Distribute torpedoes evenly.
	12.00	ER 3821	Day's run: Surfaced 244 nm
	16.00	ER 3875
	20.00	ER 6166
	24.00	ER 6431

	28.03.41
	04.00	ER 6482
	08.00	ER 6727
	12.00	ER 6775	Day's run: Surfaced 211 nm
	16.00	ER 9142
	20.00	ER 9174
	24.00	ER 8639

	29.03.41
	04.00	ER 8966
	08.00	ER 9764	Am positioned at the meeting point at dawn according to plotting, no navigation fix yesterday and today because of clouds.
	12.00	ER 8955	Day's run: Surfaced 180.2 nm.
	12.30	NNE 4, occasional rain showers, overcast	Get a longitude observation. Am positioned 20 nm west. Have underestimated westerly current (1.5 knots).
	14.20		"NORDMARK" in sight. On approaching reports a steamer bearing 350°, is not Ship 41. Because the sea and swell is too great today for transfer, I run after the steamer, pass to "NORDMARK" wait for meeting.
	14.35		Steamer bearing 30°T, steering SE, runs about 12 knots, am positioned to starboard abeam.
	16.00	ER 8966
	18.50	ER 9756	Dived. Positioned ahead of the steamer. Had a straight course 108°. (from Trinidad for Benguela). Steamer has no flag

	Sun and Moon Data 26.03.41
	Sun and Moon Data 27.03.41
	Sun and Moon Data 28.03.41
	Sun and Moon Data 29.03.41

- 20 -



	continued
	29.03.41
			no marking on the hull. From the silhouette later determined with certainty as Norwegian "K.G. MELDAHL", 3800 GRT.
			Ship does not appear correct to me, I decide to shoot.
	19.50		Tube III outer door fairing will not open.
	19.52		Tube IV shot. Torpedo does not launch, only the gyro angle setting gear retracted. Ejection was performed by launch valve, torpedo is a "dead man". I had only the two torpedoes. It was not meant to be. The good thing is that my bad conscience because of American Neutrality Zone and the proximity of "NORDMARK" is soothed.
	20.00
	20.27		Surfaced. Steamer does not set navigation lights.
	24.00	ER 8963	Went back in the direction of "NORDMARK".

	30.03.41
	04.00	ER 8961
	08.00	ER 8961
	08.55	ER 8677	Ship 41 sighted.
	10.55		Signal traffic with Ship 41 and U-105.
	12.00	ER 8913	Day's run: Surfaced 205.5 nm
			Submerged 7.3 nm = 212.8 nm.
	13.07		NORDMARK sighted.
	15.15		Towing connection is set up.
	16.30	NE 2-3, long swell, Vis. changing	7 torpedoes taken over.
		NE 2-3, long swell, Vis. changing	Delivery is well prepared and goes off smoothly.
	20.00		Remain in tow.

	31.03.41
	08.00	At meeting point	The remaining 5 torpedoes are taken over.
	11.00		Fuel and water.
	12.00		Day's run: Surfaced 140 nm
			Provisions transfer.
	18.00		Towing connection lost. The entire supply went very well, thanks to the experience, good preparation and quick work on the part of the "NORDMARK". Could only get 12 torpedoes, the leaking of main ballast tank 8, that now occurs after main ballast and reserve fuel oil tank 7 is fully fueled again, appears alarmingly. Main ballast tank 8 floods in 16-18 minutes completely independently as a result of leaks between

	Sun and Moon Data 29.03.41
	Sun and Moon Data 30.03.41
	Sun and Moon Data 31.03.41

- 21 -



	continued
	31.03.41
			the transverse aft wall of the waterproof bow which is torn at several places, so that the use of the watertight bow as a buoyancy chamber ceases.
			All attempts, to seal the chain guards meet with little success. Although forward I have practically no more buoyancy, I take main ballast and reserve fuel oil tank 7 fully fueled, run with 1 engine HF and blow with the other 3-4 times per hour. Even so, I gain 800-1000 nm of operating range.
			The condition is not pleasant, but if the watch is careful it works.
	20.00	ER 8925
	21.07		Dived. Test dive.
	21.37		Surfaced.
	22.05		Short Signal: Supply completed.
			U-106.
	24.00	ER 8962

	01.04.41
	04.00	ER 9757	Go to the southeast to cut across the South America - Route.
	08.00	ER 9792
	09.50		Radio Message 0800/1/148:
			To Kommandant U-106:
			The Führer has awarded you the Knight's Cross. I convey our congratulations to you and your brave crew.
			Oberbefehlshaber.
			Further from B.d.U.:
			Also warm congratulations.
	12.00	FC 3231	Day's run: Surfaced 147.0 nm
			Submerged 2.0 nm = 149.0 nm.
	16.00	FC 3318
	20.00	FC 3364
	24.00	FD 1181

	02.04.41
	02.43		Radio Message 0413/0421/2/172/173: To B.d.U.:
			Miss on "MALANCHA" in DT 75, sank one of about 5000 GRT in EJ 14. A fast "Blue Funnel" sighted in EH 66. General course roughly North-South. "NORDMARK" camouflaged as American "PRAIRIE". Have 13 torpedoes. Position FD 15, going to Freetown.
			U-106.
	02.56		Believe information about sighted steamer valuable for the boats still coming to the south. Information concerning "NORDMARK" camouflage in view of the

	Sun and Moon Data 31.03.41
	Sun and Moon Data 01.04.41
	Sun and Moon Data 02.04.41

- 22 -



	continued
	02.04.41
			Italians coming from the south.
	04.00	FD 1199
	08.00	FD 1525
	12.00	FD 1617	Day's run:
	16.00	FD 1656
	20.00	FD 2472
	24.00	FD 2497

	03.04.41
	04.00	FD 2816	By Radio Message operations area off Freetown north of 8°30'N and a line at the latitude of ET 25.
	08.00	FD 2838
	12.00	FD 2954	Day's run: Surfaced 168 nm
	16.00	FD 2968	Performed Equator ceremony.
	20.00	FD 2778
	24.00	FD 3749

	04.04.41
	04.00	FD 3437
	08.00	FD 3576
	12.00	FD 3564	Day's run:
	16.00	FD 3616	After the boat undercuts 2 times up to the artillery, I have main ballast and reserve fuel oil tanks 7 blown out. There was only little fuel oil in it. From this point my fuel capacity is only 162 cbm.
	20.00	FD 3689
	24.00	FE 1147

	05.04.41
	04.00	FE 1128
	08.00	ET 7799
	12.00	ET 7858	Day's run: Surfaced 183.5 nm.
	14.45		Radio Message 1505/5/177 Officer-Only: To U-105, U-106:
			For operation towards GB 15 take over fuel, provisions, sea charts on 9 April from "NORDMARK" square ER 89 center. Try to complete transfer by 10 April.
			U-124 no restrictions to attack area off Freetown.
			B.d.U.
	24.00	ET 7598	Course for meeting point.

	Sun and Moon Data 02.04.41
	Sun and Moon Data 03.04.41
	Sun and Moon Data 04.04.41
	Sun and Moon Data 05.04.41

- 23 -




	06.04.41
	04.00	ET 7579
	08.00	ET 7722
	12.00	ES 9623	Day's run: Surfaced 163.4 nm
			Submerged 3.0 nm =166.4 nm.
	16.00	ES 9594
	20.00	ES 9499
	24.00	ES 9478

	07.04.41
	04.00	ES 8921
	08.00	ES 8822
	12.00	ES 8734	Day's run: Surfaced 260.9 nm.
	16.00	ES 7694
	20.00	ES 7678
	24.00	ES 7825

	08.04.41
	04.00	ES 7735
	08.00	ES 7714
	12.00	ER 9927	Day's run: Surfaced 214 nm.
	15.40		Smoke cloud in sight bearing 285°T, 18 nm off. Small steamer on southerly course, avoided, because attack is prohibited here.
	16.00	ER 9837
	20.00	ER 9818
	24.00	ER 9753

	09.04.41
	04.00	ER 9742
	08.00	ER 8956
	11.30		NORDMARK sighted bearing 74°T.
	12.00	ER 8956	Day's run: Surfaced 214 nm
	12.48		Towing connection established. Supplied with NORDMARK. "U-105" is already finished. Took over a torpedo (earlier NORDMARK had no combat pistol, in the mean time had received a pistol from Ship 41). In addition, a diesel compressor was taken from NORDMARK and installed, ours, which has finally collapsed despite continuous repairs for some time, will be given to NORDMARK. Thus, the compressed air concern is resolved. In the last week the E-compressor failed occasionally and compressed air was a critical issue. It would be better if the boats had a second E-compressor

	Sun and Moon Data 06.04.41
	Sun and Moon Data 07.04.41
	Sun and Moon Data 08.04.41
	Sun and Moon Data 09.04.41

- 24 -



	continued
	09.04.41
			instead of, the certainly good, but, like the complaints of all boats, trouble-prone diesel compressor. The diesel compressor of "NORDMARK" has worked well for us, the troubles appear only with longer operation.
			About the approaching operation we discover on "NORDMARK" that it concerns meeting the steamer "LECH".
	19.50		Let go the tow line. Supply ended.
			I separate from "U-105", we have arranged a meeting place for the next evening to have a discussion after receipt of instructions from B.d.U.
			Transit to the south.
	24.00	ER 8982

	10.04.41
	02.06		Short Signal to B.d.U.: Supply completed. U-106.
	04.00	FC 2324
	08.00
	10.50		U-105 comes close by, has transmitter failure of the short-wave transmitter. Therefore, remain together.
	12.00	FC 2611	Day's run: Surfaced 97 nm
	15.23		Short Signal: (sent for U-105)
			Supply completed. U-105.
	16.00	FC 2644
	20.00	FC 2677
	22.00		Radio Message 1858/10/116: To U-105, U-106:
			Report by Short Signal "yes" or no, if foreign waters encryption [Schlüsselmittel Ausserheimisch] is on board. These are to be used for special task, further orders follow. B.d.U.
	24.00	FC 2718

	11.04.41
	01.16		Radio Message 2032/10/125: To B.d.U.:
			Both boats "yes" "Schewe" transmitter failure while running together. Position square FC 26. Oesten.
	04.00	FC 2972
	08.00	FC 5313
	09.26		Dived. Test dive.
	10.05		Surfaced.
			Training fire 10.5 cm, 2 cm.
	12.00	FC 5316	Day's run: Surfaced 133 nm
			Submerged 2 nm = 135 nm.
	16.00	FC 5346
	20.00	FC 5379
	24.00	FC 5643

	Sun and Moon Data 09.04.41
	Sun and Moon Data 10.04.41
	Sun and Moon Data 11.04.41

- 25 -




	12.04.41
	04.00	FC 5679
	08.00	FC 5943
	12.00	FC 5975	Day's run: Surfaced 141 nm.
	16.00	FC 8344
	20.00	FC 8533
	24.00	FC 8592

	13.04.41
	04.00	FC 8862
	08.00	FC 8897
	11.15		Radio Message 1010/13/186: To U-105, U-106:
			Await further orders in square FK. Remain undetected. B.d.U.
			This Radio Message confirms our belief that the impending operation is, from the U-boats point of view, probably only a loss of time.
	12.00	FK 1256	Day's run: Surfaced 199 nm
	16.00	FK 1286
	20.00	FK 1528
	24.00	FK 1581

	14.04.41
	04.00	FK 1816
	08.00	FK 1849
	12.00		Day's run: Surfaced 142 nm
	14.00	FK 4213	Steamer in sight bearing 260°T, NW-course.
	14.07		Dived. Steamer possibly Dutch. PELAU-class.
	15.07		Surfaced.
	16.00	FK 4211
	20.00	FK 4271
	21.25		Radio Message 2253/14/133-134: Officer-Only:
			To U-105, U-106:
			U-105 return transit in operations area west of Freetown = east of 24°W. Free to attack in accordance with Standing Naval Orders. Reach this area via the shortest route, then transit to ET.
			U-106 executes special task possibly 27 April off Rio. Until then left to operate according to time and fuel in FD or FL east of 24°W. Announce intention by yes or no. Supply at the beginning of May at Point Red intended. However, return to "Culebra" must be always possible for both boats.
			B.d.U.
	24.00	FK 4433

	15.04.41
	02.58		Short Signal to B.d.U.: No. U-106.
			Either-or. I could position approximately 20 hours east of 24°W, but for the fuel situation
			[illegible line]

	Sun and Moon Data 12.04.41
	Sun and Moon Data 13.04.41
	Sun and Moon Data 14.04.41
	Sun and Moon Data 15.04.41

- 26 -



	continued
	15.04.41
			how much I need of Rio. So no opinion.
	04.00	FK 4525
	08.00	FK 4612	U-105 starts transit to operations area.
	12.00	FK 4536	Day's run: Surfaced 115 nm
	24.00		Have stopped, let boat drift, because now there is plenty of time.

	16.04.41
	08.00	FK 4525	Running with 1 diesel LF.
	12.00	FK 4555	Day's run: Surfaced 9 nm.
	16.00	FK 4564
	20.00	FK 4583	1 diesel LF.
	24.00	FK 4831

	17.04.41
	00.05	FK 4831	Steamer with lights bearing 200°T on NE-course. Distance 6 nm.
	04.00	FK 4855
	08.00	FK 4858
	12.00	FK 7235	Day's run: Surfaced 104 nm.
	16.00	FK 7246
	20.00	FK 7279
	24.00	FK 7517

	18.04.41
	04.00	FK 7493
	08.00	FK 7735
	12.00	FK 7767	Day's run: Surfaced 132 nm.
	16.00	FK 7788
	20.00	FR 1152
	24.00	FR 1183

	19.04.41
	01.00	FR 1416
	08.00	FR 1448
	12.00	FR 1477	Day's run: Surfaced 137 nm.
	16.00	FR 1741
	20.00	FQ 3943
	24.00	FQ 6335

	20.04.41
	04.00	FQ 6364
	08.00	FQ 6622
	21.00	FQ 6619
	16.00	FQ 6673
	19.26		Radio Message 1952/19/176 Officer-Only: To U-106:
			[illegible line]

	Sun and Moon Data 15.04.41
	Sun and Moon Data 16.04.41
	Sun and Moon Data 17.04.41
	Sun and Moon Data 18.04.41
	Sun and Moon Data 19.04.41
	Sun and Moon Data 20.04.41

- 27 -



	continued
	20.04.41
			ship "LECH" against English seizure off "Rio" up to the limit of the U.S.A. Neutrality Zone.
			2) For this purpose, from 23 April daily from 3.00 hours after sunset to 3.00 hours before of sunrise be positioned off "Rio" at the meeting place in the dark sector between "Ilha Rasa" and "Ilha Redonda", 1 nm east of the latter.
			3) In the evening LECH departs on course 183° up to the dark sector "Ilhas de Palmas", then 208° up to the meeting place. Places a 2nd side lantern 1 meter over each side lantern. U-boat calls in Morse "F", "LECH" answers with "H". Strives to be positioned at the meeting point at 21.00 hours ZZ, waits for U-boat for half an hour and then continues transit.
			4) While accompanying full weapons application authorized without taking into consideration territorial waters against English ships which try to hinder "LECH" in continuing transit.
			5) When halted by aircraft "LECH" remains lying stopped to draw warships.
			6) Immediately report the following:
			"Have met LECH" : WYA
			"Have completed escort task" : WZG
			"Have positioned 2 x at meeting point in vain" : XXX.
			7) After completion of task supply and operations west of Freetown."
			B.d.U.
	20.00	FQ 6619
	24.00	FQ 6911

	21.04.41
	04.00	FQ 6883
	08.00	FQ 9224
	12.00	FQ 9281	Day's run: Surfaced 137 nm.
	16.00	FQ 9513
	20.00	FQ 9545
	20.39		Radio Message 2140/21/130: Officer-Only:
			To U-106: From now only respect the American Neutrality Zone south of 20°N within 300 nm of the coast. B.d.U.
	24.00	FQ 9493

	22.04.41
	04.00	FQ 9735
	08.00	FQ 9758
	12.00	GC 1122	Day's run: Surfaced 144 nm.
	16.00	GC 1157
	20.00	GC 1177
	24.00	GC 1443

	Sun and Moon Data 20.04.41
	Sun and Moon Data 21.04.41
	Sun and Moon Data 22.04.41

- 28 -




	23.04.41
	04.00	GC 1477
	08.00	GB 3963
	12.00	GB 6332	Day's run: Surfaced 150 nm.
	16.00	GB 6353
	20.00	GB 6375
	24.00	GB 6264

	24.04.41
	04.00	GB 6249
	08.00	GB 6168
	09.06	GB 6164	Steamer on SW course about 6000 GRT tramp. Armed.
	10.07		Dived. Running inside 300 nm, let go.
	12.00	GB 6192	Day's run: Surfaced 134 nm
			Submerged 3.6 nm = 137.6 nm.
	12.13		Surfaced.
	16.00	GB 6168
	18.38		Dived. Test dive after conversion of main ballast and reserve fuel oil tank 6.
	19.08		Surfaced.
	20.00	GB 5393
	24.00	GB 5383

	25.04.41
	04.00	GB 5296
	08.00	GB 5283
	12.00	GB 5261	Day's run: Surfaced 136.0 nm
			Submerged 0.5 nm = 136.5 nm.
	16.00	GB 5183
	20.00	GB 5171
	24.00	GB 4365

	26.04.41
	04.00	GB 1987
	08.00	GB 1949
	12.00	GB 1838	Day's run: Surfaced 146 nm.
	14.25	GB 1831	Land in sight bearing 0°T.
			Intention, 2 nights before meeting with "LECH" to determine conditions at the meeting place and in the vicinity of "Rio". To run during day well out of sight from land.
	16.00	GB 1825
	16.24	GB 1825	A steamer on a southwesterly course bearing 210°T. Turned away.
	18.26		A small coastal steamer in 100°T.
	20.00	GB 1845
	24.00	GB 1545	Am positioned close by the islands. Determine that the lighthouse on "Ilha Rasa" has no dark sector. Information in the Light List refers to black-out of the lighthouse on "Ilha Rasa" by "Ilha Redonda". There is no problem with navigation at the meeting place. Little traffic, no fishing boats.

	Sun and Moon Data 23.04.41
	Sun and Moon Data 24.04.41
	Sun and Moon Data 25.04.41
	Sun and Moon Data 26.04.41

- 29 -




	27.04.41
	03.14	GB 1517	Steamer with set navigation lights bearing 261°T, course NNE.
	04.00	GB 1644
	08.00	GB 1855
	12.00	GB 1891	Day's run: Surfaced 163 nm.
	16.00	GB 1856
	17.20	GB 1837	Steamer bearing 190°T, turned away.
	20.00	GB 1832
	24.00	GB 1564

	28.04.41
	00.44		Radio Message 1546/27/136: To U-106:
			"LECH" will depart on the evening of 28 April as intended and heads 120° from the meeting point at the end of waiting period. Speed 13 knots. B.d.U.
	02.10	GB 1559	Steamer, course 355°.
	04.00	GB 1595	Also this night I explored the navigation, nothing special.
	08.00	GB 1917
	12.00	GB 1944	Day's run: Surfaced 152 nm.
	15.10	GB 1941	Steamer, course SW.
	16.00	GB 1944
	17.42	GB 1829	Fishing trawler in sight. Turned away unseen.
	18.14	GB 1632	Steamer bearing 20°T, course SE.
	20.00	GB 1446
	21.15	GB 1515	Steamer enters "Rio".
	23.30		At meeting point between "Ilha Rasa" and "Ilha Redonda". "Ilha Rasa" directly ahead, so as not to be seen by the lighthouse.
		[1 cable length = 185.2 meters]	3 cable lengths off "Ilha Redonda".
	23.45		"LECH" in sight. No 2nd navigation light. However, departure course is so unusual that error is impossible. 2nd navigation lights might have been shown briefly also only once, because, otherwise they were too noticeable.
	24.00	GB 1519	"LECH" at the meeting point. Responds to recognition signal and extinguishes navigation lights, give him course and speed instructions, must avoid an arriving steamer.

	29.04.41
	02.08		Short Signal to B.d.U.: Have met "LECH". U-106.
	04.00	GB 1825	"LECH" must stop an engine, due to a cracked cylinder sleeve. Transit speed only 7.5 knots. Running about 500 meters ahead of "LECH". Is arranged that if he should see something before me, particularly during the day, he should turn away. Signal traffic, happily, causes no difficulties. (signal flags).
	08.00	GB 1893
	12.00	GB 1578	Day's run: Surfaced 197 nm.

	Sun and Moon Data 27.04.41
	Sun and Moon Data 28.04.41
	Sun and Moon Data 29.04.41

- 30 -



	continued
	29.04.41
	13.25	GB 1988	A steamer on a SW course bearing 330°T. Crows nest reported by "LECH". Turn off, ran out of sight.
	16.00	GB 1999
	19.28		Radio Message 2056/129/170: To U-106:
			About 1 day after dismissing "LECH" report the time and position of dismissal and anticipated arrival of "LECH" in "Gironde". B.d.U.
	20.00	GB 2789
	24.00	GB 2798

	30.04.41
	02.42		Radio Message 1153/29/158: To U-106:
			After completion of special task report by Short Signal yes or no, if you can execute similar task in the same area from 5 - 8 May. B.d.U.
			There is the following uncertainty, my instructions are: to bring "LECH" to the border of the U.S.A. Neutrality Zone. My first assumption was, release from escort north of the zone, i.e. to approximately 10°N latitude. The last Radio Message indicates the shortest exit route from the zone to the east. Is unnecessary to take ship so far to the east (24°W). Because, also, a speed of 13 knots is expected from B.d.U., and the ship currently only runs at 7.5 knots, I decide to send a Short Signal the next night to get a new release position for "LECH" as the second task can only be executed in due time when "LECH" has been released before leaving the zone. Fuel supply is sufficient for execution with renouncing "Culebra".
	04.00	GB 2889
	08.00	GB 2982
	12.00	GB 2994	Day's run: Surfaced 188 nm.
	16.00	GB 3776
		NEbyE 3-4, medium swell
	19.00 20.00 24.00	GB 3792	Go close to "LECH" to take over a letter of the Naval Attache. Hold the boat to windwad of the steamer. Conning tower at the level of the stern, speed 3-4 knots. Fresh provisions are taken over by a working line which runs through a block fastened to the conning tower. Distance from the conning tower to the steamer stern of 20-30 meters. Boat can be held in spite of the medium swells. Because the steamer drives faster, danger of collision is low. Running abeam to swell and wind. Provisions in cans are eased into the water and taken over. With fruit and vegetables the line is kept well rigid, so that the things come over dry. Infer from the Rio Attache letter that the next task concerns "WINDHUK" in Santos.

	Sun and Moon Data 29.04.41
	Sun and Moon Data 30.04.41

- 31 -




	01.05.41
	00.07		Short Signal to B.d.U.: My position GB 38.
			U-106.
	04.00	GB 3896
	08.00	GB 3992
	12.00	GC 1767	Day's run: Surfaced 198 nm.
			"LECH" has 2nd engine in service, now runs at 11.5 knots.
	16.00	GC 1865
	18.21		Dived. Crash dive for training. Boat settles to 90 meters with a large down angle as a result of the changed conditions. (main ballast tank 8 full from the outset).
	18.38		Surfaced.
			Transfer from "LECH" exactly as yesterday. Potatoes.
	20.00	GC 1960
	24.00	GC 1936

	02.05.41
	04.00	GC 2498
	08.00	GC 2591
	09.03		Radio Message 1020 from DAN Officer-Only to U-106.:
			Report immediately by Short Signal yes or no if boat can execute similar task in square GA 37 on 5 May. B.d.U.
	10.38		Short Signal to B.d.U.: "Yes". U-106.
	18.57		(Was received by Norddeich at 18.57 hours)
		E 0-1, very low swell, clear, Vis. good	Because "WINDHOEK" is a valuable ship, after the departure of "LECH" and the prior court case over the possible release of WINDHOEK an enemy seizure is likely. I decide to execute the task under any circumstances. To guarantee transit back to supply "Culebra", I need fuel from "LECH". It is unusually calm weather. "LECH" has only 24 meters of hose therefore I must go alongside. For this purpose "LECH" has brought bales of wool from Rio (about 1.5 x 1.5 meter size)
	11.58	GC 2667	Lie alongside "LECH". Forward and aft long manila lines. "LECH" has brought out four large bales of wool. Boat lies very well. (Substantially better than than with "CORRIENTES in Las Palmas). The non-matching hose connection is flanged on. Because my evaporator has failed, I also take over fresh water.
	12.00	GC 2667	Day's run: Surfaced 247.0 nm
			Submerged 1.7 nm = 248.7 nm.
			Took over 44 cbm fuel oil. Cannot take any more, because I also must drive with main ballast and reserve fuel oil tank 6 empty at high speed settings.
	15.58		Supply ended. Have determined his course with the Captain of "LECH" when I release the ship

	Sun and Moon Data 01.05.41
	Sun and Moon Data 02.05.41

- 32 -



	continued
	02.05.41
			he will run around the area 10-20°S, 20-30°W because there repeatedly from SKL auxiliary cruiser patrols are indicated.
	16.00	GC 2855	Released "LECH".
	18.00		Dived. Test dive.
	18.35		Surfaced.
	20.00	GC 2555
	22.07		Short Signal to B.d.U.: Have completed escort task.
			U-106.
			Receive orders, to execute next task on 5 May square GA 37 (Santos)

	03.05.41
	04.00	GC 1659
	08.00	GC 1559
	12.00	GC 1482	Day's run: Surfaced 242.0 nm
			Submerged 1.0 nm = 243.0 nm.
	15.08		Steamer bearing 330°T, steering 235°. Run to port ahead of him at highest speed. Steamer is faster than me, has an unusual smokestack the "Blue Funnel". Distance from land under 300 nm.
	16.00	GB 3688
	16.46		Steamer out of sight.
	19.33		Radio Message 2048/3/193 Officer-Only To U-106:
			1) Task is to bring the steamer WINDHUEK out of "Santos".
		Ilha da Moela	2) Meeting point on 5 May south of "Point Itaipu" lighthouse 2 on the Ilha da Moela in 90°T. Meeting time: 3.00 hours after sunset to 3.00 hours before sunrise.
			3) WINDHUEK will be a half an hour at the meeting point on east west courses then runs through on course 240° between the mainland and Isla Conceiâo.
			4) Behavior and task reports as ordered for "LECH".
			B.d.U.
	20.00	GB 3911
	22.43		Radio Message 2332/3/197 to B.d.U.:
			1) Have released "LECH" afternoon of 2 May in GC 26, running at 11.5 knots, via FS 83, FL 29 and EQ 65, entering "Gironde" about 24 May.
			2) Request release point for "WINDHUEK".
			3) On transit to supply attack free within 300 nm limit requested.
			U-106.
			The last paragraph should be a trial. The traffic observed up to now all ran within the 300 nm zone.
	24.00	GB 3739

	Sun and Moon Data 02.05.41
	Sun and Moon Data 03.05.41

- 33 -




	04.05.41
	04.00	GB 2936
	08.00	GB 2917
	12.00	GB 2762	Day's run: Surfaced 312 nm.
	16.00	GB 1964
	20.00	GB 1859
	24.00	GB 1785

	05.05.41
	00.28		Radio Message 1023/4/109:
			Weapons use within the 300 nm zone only in accordance with Standing Orders. B/d/U.
	04.00	GB 6331 [typo should be GA]
	05.19		Radio Message 1629/4/115: Officer-Only. To U-106:
			Task with "WINDHUEK" no longer required. Return transit via Point Red. B.d.U.
	06.10		Small vessel with 2 lights in sight. Turned off.
	06.35		Out of sight.
	07.35		Small vessel in sight. Turned off.
	08.00	GB 3996 [typo should be GA]	Out of sight.
	12.00	GB 1782	Day's run: Surfaced 292 nm.
	16.00	GB 1872	Intend on the route up to the 300 nm limit to go with 1 engine in overhaul (cooling water pump). Later shortly before meeting point with supply ship the other engine. So that I may have both engines ready in the area where I operate.
	20.00	GB 1893
	24.00	GB 1991

	06.05.41
	04.00	GB 278x
	08.00	GB 2854
	12.00	GB 2971	Day's run: Surfaced 213 nm.
	16.00	GB 2991
	20.00	GB 3782
	21.18		Radio Message 1857/6/180: To U-106: Supply takes place on 13 May at Point Red from EGERLAND. Afterwards no other supply intended. Warfare to the west of Freetown, until fuel demands return transit. Appearance of "EGERLAND" of earlier steamer "NORTH AMERICA" 8788 GRT. Normal bow. Cruiser stern. From the forward to aft: mast, bridge, king post, mast, stack. Armed, expect camouflage.
			B.d.U.
	22.59		Radio Message 2353/6/188: To B.d.U.:
			Can keep supply appointment only by waiving necessary engines overhaul and fuel to "Culebra". Request 16 May. Have 14 torpedoes. 102 cbm (44 cbm from LECH), position GB 37. U-106.

	Sun and Moon Data 04.05.41
	Sun and Moon Data 05.05.41
	Sun and Moon Data 06.05.41

- 34 -



	continued
	06.05.41
	24.00	GB 3871

	07.05.41
	04.00	GB 3865
	08.00	GB 3928
	08.45	GB 3920	Steamer bearing 180°T, course 0°. Heavy zig-zag legs.
	09.06		Dived. Steamer is "MATAROA" British. 12390 GRT. General course north.
			Distance from land 270 nm. Let him run past at 1500 meters.
	11.25		Surfaced.
	12.00	GB 3923	Day's run: Surfaced 289 nm
			Submerged 4.5 nm = 293.5 nm.
	16.00	GC 1445
	20.00	GC 1511
	24.00	FQ 9888

	08.05.41
	04.00	FQ 9832
	08.00	FQ 9642
	12.00	FQ 9355	Day's run: Surfaced 283 nm.
	16.00	FQ 6998
	20.00	FR 4777
	24.00	FR 4449

	09.05.41
	04.00	FR 4194
	08.00	FR 4133
	12.00	FR 1848	Day's run: Surfaced 232 nm.
	16.00	FR 1585
	20.00	FR 1535
	24.00	FR 1318

	10.05.41
	04.00	FK 7958
	08.00	FK 7697
	12.00	FK 7639	Day's run: Surfaced 245 nm.
	16.00	FK 8148
	20.00	FK 5787
	24.00	FK 5738

	11.05.41
	04.00	FK 5545
	08.00	FK 5285
	12.00	FK 5225	Day's run: Surfaced 245 nm.
	16.00	FK 2852
	20.00	FK 2557
	24.00	FK 2284

	Sun and Moon Data 06.05.41
	Sun and Moon Data 07.05.41
	Sun and Moon Data 08.05.41
	Sun and Moon Data 09.05.41
	Sun and Moon Data 10.05.41
	Sun and Moon Data 11.05.41

- 35 -




	12.05.41
	04.00	FK 2213
	08.00	FK 9818
	12.00	FK 9541	Day's run: Surfaced 259 nm.
	16.00	FK 9169
	20.00	FK 6798
	24.00	FK 6726

	13.05.41
	04.00	FC 6452
	08.00	FC 6158
	12.00	FC 3783	Day's run: Surfaced 251 nm.
	16.00	FC 3488
	20.00	FC 3424
	24.00	FC 3127

	14.05.41
	04.00	ER 9746
	08.00	ER 9476
	12.00	ER 9414	Day's run: Surfaced 251 nm.
	15.15	ER 8366	Tanker in sight bearing 330°T lies on SE-course. I attempt to maneuver ahead. Shifts away quickly. Therefore making slow speed.
	15.40		Tanker turns through N to W. Either zig-zagged or turned away. Probably turned away. Ship may be "EGERLAND". Have only 1 engine ready, ran after, slowly lost from sight.
	16.00	ER 9144	If it is "EGERLAND", U-38 and U-103 would still have to be with him. Therefore one of the two would run towards me and show up with me. Because this does not happen and I do not come up to the ship,
	17.10		again came to old course.
	20.00	ER 8332
	24.00	ER 5935

	15.05.41
	04.00	ER 5664
	08.00	ER 5386	Already positioned at the meeting point today.
	12.00	ER 5386	Day's run: Surfaced 206 nm.
	16.00	ER 5383
	20.00	ER 5386	Let boat drift overnight.
	24.00	ER 5386

	16.05.41
	08.00	ER 5389	At meeting point. "EGERLAND" probably has something to do with both other boats, after that the boats have not yet reported "supply executed".
	12.00	ER 5386	Day's run: Surfaced 27 nm.
	14.40		Steamer in sight, target angle 0°.
	14.44		Dived.
	14.46		Surfaced.
			Recognition signals exchanged with EGERLAND.
	16.30		Meeting with "EGERLAND" Kapitän results in the
			[illegible line]

	Sun and Moon Data 12.05.41
	Sun and Moon Data 13.05.41
	Sun and Moon Data 14.05.41
	Sun and Moon Data 15.05.41
	Sun and Moon Data 16.05.41

- 36 -



	continued
	16.05.41
			is. The ship is insufficiently equipped with torpedoes, has only 6 torpedoes. U-38 and U-103 could not take over the full amount of torpedoes. I could take 5 torpedoes, however, defer in view of "UA" and "U-69" which should soon supply. This decision has been difficult for me. The ship is equipped with little care with regard to consumables. The provisions lay in former oil bunkers and to some extent have picked up a taste. Fresh water was limited to 4 tons and this tasted brackish. The ship was well equipped only with engine parts and nautical aids. In the lee I first take over only lubricating oil, distillate, and provisions in life boats.
			Boat must partly be paddled, because the engine was not in service.

	17.05.41
	00.15	NE 3-4, medium swell	Tow connection established with "EGERLAND".
			Fuel and water taken over.
	06.45		Released tow line, supply ended.
	11.00		Dived. Test dive.
	11.28		Surfaced.
	12.00	ER 5633	Day's run: Surfaced 29 nm
			Submerged 1.5 nm = 30.5 nm.
	16.00	ER 6412
	20.00	ER 6423
	23.17		Short Signal to B.d.U.: Supply completed.
			U-106.
	24.00	ER 6433

	18.05.41
	04.00	ER 6621
	08.00	ER 6331
	10.09		Radio Message 1114/18/117 follows:
			Objective is: to detect convoy traffic to England.
			Occupy following attack areas:
			U-107 north of a line "Cape Sierra Leone" in 100°T, U-103 south of this line. Boat boats east of 20°W. U-38 area ET 10 and ES 30, U-106 area EJ 70, 80 and 90. U-105 area EJ 40, 50 and 60 and EK 40.
			"Schewe" and "Osten" start back to "Lorient" at own discretion, if necessary also before exhaustion of supply materials and report by short signal. B.d.U.
	12.00	ER 6378	Day's run: Surfaced 123 nm.
	16.00	ER 6357
	20.00	ER 6329
	24.00	ER 3995

	Sun and Moon Data 16.05.41
	Sun and Moon Data 17.05.41
	Sun and Moon Data 18.05.41

- 37 -




	19.05.41
	04.00	ES 1718
	08.00	ES 1484
	11.26		Crash dive for training.
	12.00	ES 1453	Day's run: Surfaced 155 nm
			Submerged 1.7 nm = 156.7 nm.
	12.38		Surfaced.
	18.03		Dived. Crash dive for training.
	18.45		Surfaced.
	20.00	ES 1247
	24.00	ES 1216

	20.05.41
	04.00	EJ 7883	In operations area.
	08.00	EJ 7835
	12.00	EJ 7671	Day's run: Surfaced 162 nm
			Submerged 4.1 nm = 166.1 nm.
	16.00	EJ 7617
	18.15		Dived. Crash dive for training.
	18.22		Surfaced.
	20.00	EJ 7377
	24.00	EJ 7344

	21.05.41
	04.00	EJ 7314
	08.00	EJ 4898
	12.00	EJ 7222	Day's run: Surfaced 126 nm
			Submerged 0.4 nm = 126.4 nm.
	16.00	EJ 7133
	20.00	EJ 7122
	24.00	EJ 4777

	22.05.41
	04.00	EJ 4787
	08.00	EJ 7132
	12.00	EJ 7213	Day's run: Surfaced 134 nm.
	16.00	EJ 7223
	20.00	EJ 7233
	24.00	EJ 7321

	23.05.41
	04.00	EJ 7331
	08.00	EJ 8114
	12.00	EJ 8125	Day's run: Surfaced 117 nm
			Submerged 1 nm = 118 nm.
	16.00	EJ 8135
	20.00	EJ 8216
	23.18		Short Signal: to B.d.U.: No traffic. U-106.
	24.00	EJ 8215	Consider the area not very productive, make for São Vicente, or farther to the west.

	Sun and Moon Data 19.05.41
	Sun and Moon Data 20.05.41
	Sun and Moon Data 21.05.41
	Sun and Moon Data 22.05.41
	Sun and Moon Data 23.05.41

- 38 -




	24.05.41
	04.00	EJ 8135
	08.00	EJ 8124
	12.00	EJ 7336	Day's run: Surfaced 134 nm.
	16.00	EJ 7324
	18.15		Dived. Crash dive for training.
	18.25		Surfaced.
	20.00	EJ 7236
	24.00	EJ 7224

	25.05.41
	04.00	EJ 7136
	08.00	EJ 7125
	12.00	EJ 7114	Day's run: Surfaced 148.0 nm
			Submerged 1.1 nm = 149.1 nm.
	14.15	EJ 7116	U-boat in sight bearing 90°T on SW course. Broad conning tower, compares to silhouette of an Italian.
	14.25		Dived. Can not find the boat in the periscope. Therefore it is also dived. Recognition signals exchanged with "UA".
	14.42		Surfaced. "UA" in sight. Set out dinghy, drove over and describe conditions to the Kommandant, he is in transit to supply.
	16.00	EJ 7116
	17.30		"UA" out of sight.
	20.00	EJ 7126
	24.00	EJ 7136

	26.05.41
	04.00	EJ 7224
	08.00	EJ 7235
	12.00	EJ 7316	Day's run: Surfaced 125 nm
			Submerged 1 nm = 126 nm.
	16.00	EJ 7335
	20.00	EJ 8116
	24.00	EJ 8134

	27.05.41
	04.00	EJ 8214
	08.00	EJ 8224
	12.00	EJ 8235	Day's run: Surfaced 129 nm.
	16.00	EJ 8316
	17.55		Dived. Crash dive for training.
	18.13		While diving it is discovered that the attack periscope leaks. Cause is that, of the 10 holding bolts of the front glass of the headpiece, 8 have rusted through and the front glass has become loose. Bolts are bored. Periscope dried but salt crystals remain on the lenses. As a result, the attack periscope is out of service. Front glass is fastened with new bolts and sealed.
	18.51		Radio Message 2009/27/121: Southern boats:
			New attack areas U-103 and U-38 south of the line "Freetown" in 40°T.

	Sun and Moon Data 24.05.41
	Sun and Moon Data 25.05.41
	Sun and Moon Data 26.05.41
	Sun and Moon Data 27.05.41

- 39 -



	continued
	27.05.41
			U-105 and U-106 no restrictions to operating area. All boats north of 5°N remain east of 30°W south of 5°N remain east of 25°W. B.d.U.
	20.00	EJ 8327
	24.00	EJ 8315

	28.05.41
	04.00	EJ 5898	Going to St. Vincent.
	08.00	EJ 5882
	12.00	EJ 5884	Day's run: Surfaced 116 nm
			Submerged 1 nm = 117 nm.
	14.44		Radio Message 1524/28/152: To U-105, U-106, U-107:
			English steamers have repeatedly received instructions to head for "São Vicente" Cape Verde. B.d.U.
	16.00	EJ 5791
	20.00	EJ 5728
	24.00	EJ 5479

	29.05.41
	04.00	EJ 5447
	08.00	EJ 4638
	12.00	EJ 4392	Day's run: Surfaced 135 nm.
	16.00	EJ 4336
	20.00	EJ 2744	Intention: To monitor the harbor off Porto Grande at the south entrance between São Vicente and Santo Antao. To position between the islands by night. Set off by day.
	22.20	Point Machado bearing 50°T
	23.20	EK 2711	A darkened steamer bearing 130°T on opposite course. (about 220°) distance 1.5 nm. Turned to run off and maneuver ahead. I want to attack before he gets too far from the coast.
	24.00	EK 1933

	30.05.41
	00.00	NE 3-4, Vis. good	Steamer turns to 260°.
	00.10		" " " 315°.
	00.25		" " " 270°.
	00.36	Ponta do Chao de Mangrade lighthouse bearing 9°T, 20 nm	1st shot range = 500 meters, target angle 80°, target speed = 12 knots. Hit astern after 37 seconds. (560 meters).
	00.36		2nd shot Tube runner, withdrawal linkage not totally withdrawn, later ejected.
			Steamer was about 4000 GRT, sharply cut ship, raked bow, cruiser stern.
	00.50		Sunk. 4 boats or rafts in the water. Fired two torpedoes, because the torpedoes no longer seem reliable to me. Did not transmit.
	04.00	EJ 1928
	08.00	EJ 1973

	Sun and Moon Data 27.05.41
	Sun and Moon Data 28.05.41
	Sun and Moon Data 29.05.41
	Sun and Moon Data 30.05.41

- 40 -



	continued
	30.05.41
	12.00	EJ 1982	Day's run: Surfaced 203 nm.
	13.39		Dived.
	15.13		Surfaced.
	16.00	EJ 1961
	19.37		Dived.
	19.48		Surfaced.
	20.00		Run again between São Vicente and Santo Antao to determine what lies in Porto Grande.
	24.00	Point Machado bearing 101°T
		Point Ribeirp bearing 75°T

	31.05.41
	00.30		Can see the harbor well.
	01.07	Ilhéu dos Pássaros bearing 75	Steamer with dimly set navigation lights raises anchor, heads east from harbor off Ilhéu dos Pássaros in the Channel of São Vicente, extinguishes navigation lights.
		Point Machado bearing 180°T
		NE 4-5, overcast, moon sets
		NE 4-5, overcast, moon sets	My fear the he wants to run off to the NE, does not prove true, he comes towards me therefore wants to go to the west. I run ahead of him to attack him well beyond territorial waters. Steamer heads 250°, runs at about 12 knots.
	02.50		The nearest land (Antao) is about 15 nm off. I turn to shoot. (Attack)
	03.13		1st shot G 7e, range = 800 meters, target angle 90°, target speed = 12 knots. Hit after 1 minute 41 seconds.
			2nd shot G 7a, circle runner, stopped the boat, nothing more heard, the torpedo is out of sight.
			Steamer is hit astern, transmits "CLAN MACDOUGAL" 6843 GRT, British. Still floats well. Has stopped. Sea and swell too great for artillery operation. Land is too near.
	03.24		3rd shot stern G 7a. Miss astern. Steamer may have still had some speed. Range = 500 meters.
	03.34		4th shot stern G 7a, range = 500 meters. Hit after 41.5 seconds. Surface runner.
	03.45	Point Chao de Mangrade bearing 26°T, 20 nm	Steamer sinks.
			Had sent a wrong position, possibly deliberately, because the specified position is 4 nm away from St. Vincente."
			Sent Position: Correct Position:
			16° 30'N 16° 45.5N
			25° 10W 25° 31W
	04.00	EJ 1931
	08.00	EJ 1865
	12.00	EJ 1893	Day's run: Surfaced 192.0 nm
			Submerged 2.5 nm = 194.5 nm.
	16.00	EJ 1943
	18.36		Dived. Test dive.
	18.54		Surfaced.
	20.00	[missing line]
	24.00	[missing line]

	Sun and Moon Data 30.05.41
	Sun and Moon Data 31.05.41

- 41 -




	01.06.41
	04.00	EJ 2468	Have run through the Channel São Vicente, at best 1 ship is discovered in Porto Grande harbor. Here for the moment there is nothing to be found. Positioned at first light well offshore off the north entrance.
	08.00	EJ 2519
	09.50	EJ 2415	Outbound coastal steamer in sight bearing 30°T apparently with Spanish top flag. Then the harbor is probably empty. However what enters comes from the south. Therefore ran to the west of Antao off the south entrance.
	11.35		Steamer out of sight.
	12.00	EJ 2432	Day's run: Surfaced 169 nm
			Submerged 1 nm = 170 nm.
	16.00	EJ 2482
	20.00	EJ 2178
	24.00	EJ 1665

	02.06.41
	04.00	EJ 1684
	08.00	EJ 1911
	11.31		Radio Message 1037/2/192: Officer-Only.
			Southern boats: Admiralty give all ships instructions not to go to Cape Verde, because of U-boat operations there. B.d.U.
			Aha! This hole is closed. Run off to the west. Suspect traffic between 26° and 28°W.
	12.00	EJ 1940	Day's run: Surfaced 140 nm.
	16.00	EJ 1861
	20.00	EJ 1842
	24.00	EJ 1753

	03.06.41
	04.00	EJ 1718
	08.00	EJ 1486
	12.00	EJ 1544	Day's run: Surfaced 186.0 nm
			Submerged 1.5 nm = 187.5 nm.
	16.00	EJ 1511
	20.00	EJ 1422
	24.00	EH 3636

	04.06.41
	04.00	EH 3616	Because nothing is found between 26° and 28°W in two legs, I go further to the west.
	08.00	EH 3526
	12.00	EH 3736	Day's run: Surfaced 196 nm.
	16.00	EH 3416
	20.00	EH 3178
	21.57	EH 3158	A darkened steamer bearing 91°T, course south, heavy zig zags. I maneuver ahead. Steamer is about 3500 GRT. Old coal ship.
	24.00	EH 3158

	Sun and Moon Data 01.06.41
	Sun and Moon Data 02.06.41
	Sun and Moon Data 03.06.41
	Sun and Moon Data 04.06.41

- 42 -




	05.06.41
	04.00	EH 3429	Must wait until moonset, ran therefore on the general course of the steamer. He steers zig zags on 180° on 30°W. Runs about 10 knots, for 3 hours.
		NE 3, dark night, overcast
	04.16		1st shot, G 7e, range = 700 meters, target angle 90°, target speed 11 knots.
			2nd shot, G 7e, range = 700 meters, target angle 90°, target speed 10 knots.
			Miss
			New approach, matched speed, now runs slower, about 7 knots.
	05.08		3rd shot, G 7a, range = 800 meters, target angle 80°, target speed = 7 knots. Miss.
			According to bubble track it would have had to hit or missed astern.
	05.38		4th shot, G 7a, range = 800 meters, target angle 60°, target speed 9 knots. Miss. Unexplained. Bubble track normal.
			Remained undetected during all attacks. Approaches were prepared carefully. Steamer speed was exactly matched. Depth setting was 3 meters in all cases. Fire control arrangement has worked well. The differences in the speed are to be explained perhaps by boiler cleaning (coaler).
			Tubes are empty, because the steamer is not particularly valuable and the Sea too high for artillery, I let him go.
			This series of misses is inexplicable to me, because in spite of heavy zig zags (all 6 minutes) the target angle and speed had been determined approximately correctly and the range at the shot was no more than 7-800 meters.
	06.45	EH 3459	Steamer out of sight.
	08.00	EH 3426
	12.00	EH 3191	Day's run: Surfaced 208 nm.
	16.00	EH 3191
	20.15		Dived. Test dive.
	20.40		Sound bearing 18°T.
	20.53	ENE 3-4, clear, moonshine	Surfaced. A steamer bearing 355°T, course south. Run ahead, general course 180°. Zig zags at intervals of 5-10-15 minutes up to 23.00 hours then long legs.
			To bright for attack, waiting until moonset.
	24.00	EH 3167

	06.06.41
	04.00	EH 3426
	05.03	EH 3429	Shot G7e, range = 500 meters, target angle 60°, target speed 9.5 knots. Hit amidships after 27.5 seconds. Steamer about 4000 GRT. An old ship. Transmits only "SSSSS". No name or position.
	05.37		Steamer sinks. About 1 minute after sinking heavy detonation like a depth charge.
	08.00	EH 3198	[illegible line]
	12.00	[illegible line]

	Sun and Moon Data 05.06.41
	Sun and Moon Data 06.06.41

- 43 -



	continued
	06.06.41
	16.00	DS 9758
	16.17	DS 9764	Darkened steamer bearing 90°T, course south. Heavy zig zags. Also steering on 30°W on general course 180°. I maneuver ahead and run on his general course. Intention is, to wait for night. Steamer runs about 10 knots.
	20.00	EH 3126	It is nearly a full moon and too brightly for attack. Steamer steers too irregular zig zags for submerged attack .
		NE 3-4, clear, bright moonshine
	23.13	EH 3191	A 2nd darkened steamer bearing 311°T. Steering general course SE.
	24.00	EH 3194

	07.06.41
	00.15		2nd steamer out of sight. Remain with the first. To play it safe, I wait for moonset.
	04.00	EH 3467
	05.47	Moon has set. Night is very dark.	Shot, G 7e, range = 500 meters, target speed 10.5 knots, target angle 90°. A failure.
			Shooting data was ascertained exactly. Steamer travels in ballast, propeller beats occasionally out. Size about 3500 GRT. An old ship, coal. Depth setting of torpedo was 3 meters. ( I did not want a lower setting because of the prevailing swell.)
			Suppose torpedo has under steered.
			Because I still only have 1 torpedo in the tubes and 1 in the over deck and the target is not worthwhile, I will save the torpedo for something better, because evidently there is heavy traffic here.
	07.40		Steamer out of sight.
	08.00	EH 3494
	12.00	EH 3434	Day's run: Surfaced 243 nm.
	16.00	EH 3156
	19.19		Dived. Test dive.
	19.43		Surfaced.
	20.00	DS 9794
	24.00	DS 9734

	08.06.41
	00.07		Short Signal: Return transit started. U-106.
	04.00	DS 9465
	08.00	DS 9195
	12.00	DS 9113	Day's run: Surfaced 212 nm
			Submerged 1 nm = 213 nm.
	16.35	DS 6738	Steamer bearing 332°T, general course south. I maneuver ahead. Steamer has a general course of about 190°.
	20.00	EH 6782
	20.25	NE 3-4, overcast	Dived. Positioned ahead on the general course. Intend to approach submerged.
			Steamer zig zags irregularly, speed matched
			[missing line]

	Sun and Moon Data 06.06.41
	Sun and Moon Data 07.06.41
	Sun and Moon Data 08.06.41

- 44 -



	continued
	08.06.41
			determine the legs submerged, however, can approach only to approximately 1500 meters. Shot appears too uncertain to me, therefore, intend surface approach.
	21.55		Surfaced. Steamer runs darkened on old general course with legs at intervals of about 8 minutes. Again maneuver ahead. Today it is overcast, the moon will not set today.
	24.00	DS 9119

	09.06.41
	00.30		I let myself settle back towards the steamer from ahead without needlessly showing a broad silhouette. It is quite light, however, one might approach unseen to 800 meters.
	01.00		Shot, range = 1000 meters, target speed 10 knots, target angle 90°. Depth 3 meters. Failure.
			Steamer stops shortly after the shot for a moment, then runs on. This fact validates the belief that a pistol failure may have been present.
			Out of torpedoes below deck. The sea state is too high for artillery. Reload of one of the torpedoes in the overdeck is only possible outside the trade wind area.
	01.45		Steamer out of sight.
	04.00	DS 6788
	08.00	DS 6762
	12.00	DS 6576	Day's run: Surfaced 224 nm
			Submerged 5.5 nm = 229.5 nm.
	16.00	DS 6537
	20.00	DS 6372
	24.00	DS 6323

	10.06.41
	04.00	DT 1744
	08.00	DT 1485
	12.00	DT 1439	Day's run: Surfaced 243 nm.
	16.00	DT 1224
	20.00	DG 9767
	24.00	DG 9759

	11.06.41
	01.24		Dimmed steamer bearing 48°T, course south. Turned away because I still have not unloaded due to weather.
	01.45		Out of sight.
	04.00	DG 9561
	08.00	DG 9283
	12.00	DG 9233	Day's run: Surfaced 238 nm
			Submerged 1 nm = 239 nm.
	16.00	DG 6954
	20.00	DG 6697
	23.00		1 torpedo unloaded from the overdeck in tube 1, [illegible line]

	Sun and Moon Data 08.06.41
	Sun and Moon Data 09.06.41
	Sun and Moon Data 10.06.41
	Sun and Moon Data 11.06.41

- 45 -




	12.06.41
	04.00	DH 4417
	08.00	DH 4159
	12.00	DH 1814	Day's run: Surfaced 258 nm
			Submerged 0.7 nm = 258.7 nm.
	16.00	DH 1846
	20.00	DH 1619
	24.00	DH 1365

	13.06.41
	04.00	CF 8981
	08.00	CF 8699
	12.00	CF 9425	Day's run: Surfaced 328 nm.
	16.00	CF 9241
	18.39		Dived. Test dive.
	19.06		Surfaced.
	20.00	CF 6882
	23.10		Steamer with lights bearing 114°T.
			Course west (for the Azores). Because it was probably neutral, not pursued.
	24.00	CF 6911

	14.06.41
	04.00	CF 6653
	08.00	CG 4172
	12.00	CG 4123	Day's run: Surfaced 279 nm
			Submerged 1.2 nm = 280.2 nm.
	16.00	CG 1818
	20.00	CG 1583
	24.00	CG 1612

	15.06.41
	04.00	CG 1362
	08.00	BF 7759
	11.00		Clocks set forward 1 hour.
	12.00	BF 7733	Day's run: Surfaced 270.5 nm.
	15.00		Clocks set forward 1 hour. Starting from now all times DGZ.
	16.00	BF 7558
	20.00	BF 7613
	22.00		Short Signal: Positioned 36 hours off return harbor.
			U-106.
	24.00	BF 8118

	16.06.41
	04.00	BF 5749
	08.00	BF 5498
	10.03		Dived.
	11.20		French fishing trawler in sight with set national flag, course NW.
	12.00	BF 5572	Day's run: Surfaced 278 nm
			Submerged 5 nm = 283 nm.
	16.00	BF 5549
	16.30		2 fishing trawlers in sight.
	20.00	BF 5551	Surfaced at 18.58 hours. Dived at 19.09 hours.
	21.37		Surfaced.
	24.00	BF 5523

	Sun and Moon Data 12.06.41
	Sun and Moon Data 13.06.41
	Sun and Moon Data 14.06.41
	Sun and Moon Data 15.06.41
	Sun and Moon Data 16.06.41

- 46 -




	17.06.41
	02.47		Dimmed sailing vessel bearing 10°T, course SE.
	02.50	Pen Men bearing 50°T
	03.00		Periscope with foam wake sighted. Error possible. Turned away hard and ran off at highest speed.
	03.12		Dived.
	04.00	BF 6175
	08.00	BF 6173
	10.00	Point L 2	Taken under escort at L 2.
	12.00	Lorient	Made fast Lorient.
			Day's run: Surfaced 58 nm
			Submerged 51 nm = 119 nm. [sum is incorrect]


			Total Day's run:
			Submerged 182.9 nm
			Surfaced 20248.0 nm = 20430.9 nm.



			Kapitänleutnant and Kmdt.

	- 47 -




			Report of the Kommandant of "U-106"
			on the supply ship : "EGERLAND"___

			U-106 supplied on 16./17.5.41 with supply ship "EGERLAND"

			Torpedo:
			The outfitting of this ship with torpedoes was insufficient. In my opinion, it would have been possible to clamp down additional torpedoes on deck with the perfect weather conditions at hand in the Central Atlantic. The ship had only 44 of the intended 60 torpedoes aboard. Several supplying boats could not take the full complement of torpedoes. I could have taken 5 torpedoes, however, had to defer because there were still 2 boats coming from the homeland to supply within next eight days. I could not justify taking over the remaining 6 torpedoes myself. The space in which the torpedoes were stored was unsuitable from the remarks of the Kapitän of the "EGERLAND" because of transportation difficulties getting through the hatch leading to accidents which resulted in casualties to personnel.

			Provisions:
			Provisions were plentiful, even if the composition did not meet the requirements of a tropical cruise on a U-boat. The cold storage rooms were inadequate, so that great amounts of provisions, which should have been kept in cold storage rooms, had already partly gone bad three weeks after leaving the ship. The accommodation of provisions in the former oil bunkers resulted in everything, except for canned provisions, acquiring an oil taste.

			Transfer:
			Transfer was executed in rubber boats which "EGERLAND" and "NORDMARK" had taken. At the beginning of the transfer the rubber boat motor soon had engine trouble, so that the boat had to be paddled, which under the prevailing weather conditions, resulted in great difficulties, and was very time consuming. The ship's center engine navy launch was not used because in the Captain's view, this boat was too heavy and the tackle on the foreship was too flimsy to launch and retrieve. During the supply of other boats up to 9 torpedoes were paddled due to the failure of the rubber boat motors.

			Machinery:
			The outfitting of consumable materials was completely insufficient. There was no canvas, cable, salt water soap etc. There was no wash water at all and the drinking water had taken on a very strongly taste of the tank lining. Apart from a few carboys there was only a tank of distilled water which was useful, however, only after lengthy filtering because the tank lining had pealed off. The outfitting of engine spare parts was good.

			General:
			In assessing the supply ship"EGERLAND" the comparison with the supply ship "NORDMARK" which met all requirements in an exemplary manner, decisive.
			[illegible line below]

- 48 -





	from "EGERLAND". The division: a civilian-military crew is inappropriate for a so long a voyage and the high demands which are placed on such a ship. The civilian crew consisted partly of long discharged personnel, and partly of quite inexperienced personnel. In the naval crew were many recent recruits and some older reservists were aboard, so that difficulties were seen manning the lookout reasonably.
	The Captain made a good impression, however, it was difficult for him, with this crew and for this purpose hurriedly outfitted ship, to meet the military demands placed on her. In my opinion, a ship which is dependent on itself for so long under the most difficult conditions should be manned with particularly good personnel. Only then are the deficiencies which inevitable arise from the fact that the ship was originally built for other purposes and could only be provisionally prepared to make do.
	The military [rest of this line is illegible] however, it appears correct to use an experienced officer in this position.
	The atmosphere aboard this ship was depressed from the outset and the meaning and importance of their task was only partially understood by the crew. I had the impression, that the supply of the boats by the ship was felt as a burden, that supply concerned the military escort party, while the civilian crew was involved only if absolutely necessary.
	Overall the ship personnel appear a little too thinly manned. Added to this, 2 other boats had already been supplied shortly before our supply and the personnel were overworked.


		signed in draft. Oesten
		Kapitän und Kmdt. U-106





	As enclosure to Kriegstagebuch.

Comments of the B.d.U.

1.)	A successful, well executed patrol, for the most part there is not much to say.
2.)	The observation of the Commander, that contact keeper reports must be continued even if it is thought that the other boats are also at the enemy, is very true. As this patrol shows, such an assumption can easily be wrong.
3.)	Long and tough pursuit of the convoy is particularly emphasized, as well the good co-operation with "U-105".
4.)	Documentation for the sinking of torpedoed ships is sometimes quite meager. The great range to the next bases confirms the belief of the commander still more.

	Signed in draft: Dönitz
	For the Befehlshaber der Unterseeboote
	The Chief of Operations Department

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