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merc4ulfate · 04-18-13, 08:02 PM

http://www.uboatarchive.net/KTBNotes...iveEdition.htm

Section VII :

(b) When attacked at Night. Night attacks on U-boats are in the nature of things generally made in the vicinity of convoys. Whether the U-boat is attempting to attack on the surface or has been detected submerged the tactics may well be to surface as soon as possible and escape at high speed.

(c) Asdics. Some of the limitations of the asdic are known to the enemy. It is realised that contact must necessarily be lost when running in to attack and sometimes as soon as the attacking vessel is committed U-boats increase to full speed and work their pumps if required. Many commanding officers endeavour to keep their boat bow or stern on to the attacking vessel in order to give the narrowest extent of target. The ping of transmission can be heard by hydrophones in a U-boat at greater range than that at which it is first possible to get an echo. When the A/S vessel is at close range the transmission can sometimes be heard aurally.

(d) U-boats sometimes deliberately allow themselves to be sighted while other boats in the vicinity get away or attack without interference.

04-18-13, 08:02 PM	#20
merc4ulfate DILLIGAF Join Date: Feb 2007 Location: florida Posts: 2,058 Downloads: 210 Uploads: 0	http://www.uboatarchive.net/KTBNotes...iveEdition.htm Section VII : (b) When attacked at Night. Night attacks on U-boats are in the nature of things generally made in the vicinity of convoys. Whether the U-boat is attempting to attack on the surface or has been detected submerged the tactics may well be to surface as soon as possible and escape at high speed. (c) Asdics. Some of the limitations of the asdic are known to the enemy. It is realised that contact must necessarily be lost when running in to attack and sometimes as soon as the attacking vessel is committed U-boats increase to full speed and work their pumps if required. Many commanding officers endeavour to keep their boat bow or stern on to the attacking vessel in order to give the narrowest extent of target. The ping of transmission can be heard by hydrophones in a U-boat at greater range than that at which it is first possible to get an echo. When the A/S vessel is at close range the transmission can sometimes be heard aurally. (d) U-boats sometimes deliberately allow themselves to be sighted while other boats in the vicinity get away or attack without interference.