Sanitary arrangements are complete, but are not in all respects satisfactory.  
          It is not believed that further research is warranted.  
March, 1946


          Sanitary arrangements on this type of vessel are described below.  
          Toilet spaces were provided as follows:  
          a)  Forward torpedo room  
                  two folding washbasins  
                  one W.C.  
          b)  Petty officers' quarters  
                  one folding washbasin  
          c)  Chief petty officers' quarters  
                  one folding washbasin  
          d)  Galley  
                  one sink  
          e)  Wardroom  
                  one folding washbasin  
          f)  C.O. stateroom  
                  one folding washbasin  
          g)  After torpedo room  
                  two folding washbasins  
                  one W.C.  
          h)  Bridge  
                  one urinal funnel  
          Potable water supply consists of one tank in each of the following compartments: forward torpedo room, below the galley in the battery compartment, control room and after torpedo room.  
          Total potable water tank contents, when full, are 4070 liters (1075 gal.).  
          Wash water is obtained from two tanks, one in each torpedo room, and at the start of a voyage from the WRT tanks.  Tank capacity is as follows:  
Wash water tanks
60 liters
WRT tanks
19260 liters
19320 liters
          One dirty water tank with a capacity of 1140 liters (310 gal.) is located below the galley.  
          Garbage is disposed by collecting it in cans and throwing it over the side.  
    - 1 -


          Ship's cleaning gear consists of hose, buckets, brushes and brooms.  Locker stowage is provided for this equipment.  
          Ratproofing exists in part.  
  Toilet Spaces  
          Water closets originally provided were of the Margus type, consisting of a vitreous bowl with a wooden seat, a receiving chamber, and a provision for evacuating the receiving chamber either by means of compressed air or by a hand pump, discharging overboard.  This unit discharges directly overboard.  
          On some vessels the water closets have been replaced by siphon type domestic vitreous units, equipped with a flushing supply from the sea, which empty into a sanitary tank of varying capacity depending on space available.  This sanitary tank is blown to the sea periodically.  
          Folding washbasins are of pressed metal, built into a cabinet standing on the deck.  The upper part can be filled from a bucket, and has a mirror front.  The bottom of the gravity tank is provided with a faucet which permits water to flow into the bowl.  Water is vacated from the bowl when it is raised into a vertical position.  
          In the case of washbasins forward of the control room, the vacated water flows from the basin through drainage piping to the main ship's sanitary tank.  Used water from the washbasin in the after torpedo room empties into a container, which must be carried forward and emptied at intervals.  
          The bridge urinal is no more than a funnel with a pipe leading down to the tank top.  
  Potable water system  
          This system is provided with suction lines from each potable water tank to a manifold in the galley, from which a hand pump delivers it, either by way of the water heater or by way of the cold water line to the faucet at the galley sink.  
          In addition, an emergency hand pump is provided in each torpedo room, which takes a suction direct from the potable water tank in the compartment and delivers it to an outlet.  
    - 2 -


          All three of the lines by which water may be obtained from the tanks are equipped with activated charcoal filters with replaceable filter cartridges.  
          The interior of all potable water tanks is cemented.  
          Each tank is fitted with a sounding tube, and the tube on the tank in the control room is provided with a small container on a chain so that, in case of emergency, the sounding tube can be used as a means of obtaining water for persons in the compartment.  
  Wash Water System  
          This is divorced from the potable water system.  It consists of a hand pump in each torpedo room, with suction piping connection to the WRT tanks in the room, and discharge piping to a small gravity tank or into a bucket.  The connection in the forward torpedo room is so made that it is possible to mix wash water and hot salt water when filling the bucket.  
          Bathing facilities consist of:  
          a)  A sprinkler pipe which can be hung from the radio antennas aft of the fairwater, and provided with cold salt water by a hose connection to the deck wash and fire line.  
          b)  A shower head at the forward end of the engine room, on the starboard side, with hot and cold salt water connections to the circulating water system.  Note:  Water from this shower empties into the engine room bilge.  
  Sanitary drains and piping  
          These are confined to piping from the forward washbasins, the galley sink, and the galley and provision locker deck to the drain tank (dirty water tank).  The contents of this tank are pumped to sea by way of the forward drain pump.  
          Each of the foregoing drains is provided with a connection for an air hose to permit blowing the line clear.  
          Separate deck drains lead from the battery deck to the control room bilge, from the conning tower to the control room bilge, and from the forward and after torpedo room lavatory decks to the respective bilges.  
    - 3 -


  Garbage Disposal  
          No further detail is necessary.  
  Ship's Cleaning Gear  
          No further detail is necessary.  
          Ratproofing is incomplete by international standards.  
          Connections of wood joiner work to decks are generally satisfactory with flat bar steel backing in lieu of flashing.  All joints in permanent woodwork are made tight.  A complete job has not been done, however, for cable and piping openings to the space in back of woodwork have been closely fitted or provided with metal collars only in few cases; there are many inaccessible places within the vessel outboard and below piping, cable runs, flasks and machinery components; the interior of lockers is not flashed; pipe and cable openings in bulkheads are not tight in all cases, and have been left unblanked when the pipe or cable has been removed.  Further, while ventilating openings to lockers have been screened, locker door construction is not vermin-proof.  This is particularly true of the drop roller type of doors on the lower lockers.  
          The use of ceramic material for closet bowls indicated lack of thought with regard to the effect of shock.  All these items observed have been cracked and otherwise unsanitary.  The operating principles employed, however, parallel U.S. practice.  
          The number of washing places compares favourable with U.S. Naval practice, but the use of multiple gravity tanks does not indicate efficient use of man power on board.  
          The potable water system reflects the limited amount of water available.  The fitting of sounding pipes to fresh water tanks is not considered good practice, but with the tanks located as they were, in the bilge, the German designers had little choice.  
          The wash water system is again the product of the limited fresh water supply.  For the purpose, it is simple and effective.  Bathing facilities are primitive, however,  
    - 4 -


          Sanitary drains do not exist as an integrated system, and, with the exception of the piping from the washbasins, serve only to assist the flow of water to the bilges from where it can be pumped overboard by way of the drain system.  
          Ratproofing is incomplete.  
    - 5 -



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