TO:          Commodore of "ONS 5"
	FROM:    C.P.O. Telegraphist
	DATE:     12th May, 1943.
	SUBJECT:  Improper use of International W/T Call Sign
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	Submitted,
	On 2nd May, No. 11, British Ship "Bristol City" having become a straggler in the heavy weather made an enemy report "Submarine sighted in position . . . . . . . . ".  She used her Convoy call sign for this report in accordance with current orders.  The Senior Officer of Escort, wishing to obtain a D/F bearing, instructed her by W/T, using convoy call signs, to transmit her call sign.
	Also on 2nd May, No. 21, British Ship "Dolius", having straggled, called Commodore and S.O. Escort, using General Callsign procedure for over an hour before broadcasting her message.  Message was not answered.  This repeated calling gave the enemy submarines an excellent opportunity to obtain accurate D/F bearings.
	Both these ships have been torpedoed and sunk but these instances of
	(a)  a flagrant breach of the regulation and
	(b)  an ill-advised breaking of W/T silence are reported as being good examples of how ships in convoy may make costly mistakes.
	I have the honour to be, Sir,
	Your obedient servant,
	Colin C. Cox, C.P.O. Tel.

 

	TO:          Commodore of "ONS 5"
	FROM:    C.P.O. Telegraphist
	DATE:     12th May, 1943.
	SUBJECT:  B.A.M.S. Transmissions by Louisburg and Washington
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	Submitted,
	Both these stations transmit their traffic in chronological order of times of origin.  It is suggested that they should transmit their newest traffic first thus enabling ships which have already received traffic which has been previously broadcast to discontinue their B.A.M.S. watch as soon as they have received new traffic.  At present much time is spent in waiting for old traffic to be retransmitted before fresh traffic is commenced.  This means that in Commodore's ship main line receiver is on B.A.M.S. frequency for possibly  thirty minutes waiting for one fresh signal to be made and 500 KC/S is being covered by 2nd channel receiver which is generally a much less efficient receiver than the main.
	I have the honour to be, Sir,
	Your obedient servant,
	Colin C. Cox, C.P.O. Tel.