Official: Prime Minister: Anti-Submarine Warfare, 1939-45.

Reference code: CHAR 20/135

Part of: CHAR 20
Next record: CHAR 20/136
Previous record: CHAR 20/134

Date: Sep 1939 - Jun 1943

Scope/content:

Anti Submarine warfare bar charts and graphs noting: the number of German U Boats destroyed; the method of attack; the state of the U Boat Fleet of Germany and Italy ; German and Italian U Boat Activity; German, Italian and Japanese U Boats known to be sunk; those which have probably been sunk or damaged; weekly sinkings of British Allied and neutral merchant shipping; French submarines sunk; Romanian U Boats sunk; Midget Submarines destroyed and human torpedoes destroyed.

Other details

Access: Physical: 1 File
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Original Reference: Language:

Contained records

Reference Record Date
CHAR 20/135/1 Cover sheet marked "German U Boat casualties since September 1939" and signed by C S Wright (Director of Anti Submarine Warfare). 1941
CHAR 20/135/5-7 Chart noting the method of destruction of German U boats which have been sunk. c 1939
CHAR 20/135/8-9 Chart noting the method of destruction of German U boats which have probably been sunk. c 1939
CHAR 20/135/10-11 Chart noting the method of attack used on the German U boats which have probably been damaged. c 1939
CHAR 20/135/12-16 Chart noting the State of the U boat Fleet, marking the number of U boats which: have been completed; which are available; which are operating and which have been destroyed. c 1939
CHAR 20/135/17-18 Chart noting U boat activity, registering the number of merchant vessels sunk and the number of U boats operating. c 1939
CHAR 20/135/19 Map charting the supply routes to Britain. c 1940
CHAR 20/135/20-26 Graphs charting U boat activity recording the number of: German and Italian U boats destroyed; of German and Italian U boats operating and of merchant vessels sunk. 01 Dec 1940 - 13 Jun 1943
CHAR 20/135/27-43 Tables noting the details of the U boats which are known to have been sunk, recording: the number of the vessel; the Allied warship involved; the date it was sunk; its position; the depth and additional remarks. 14 Sep 1939 - 14 Jun 1943
CHAR 20/135/44-48 Tables noting the details of the U boats which are thought to have been sunk, recording: the number of the vessel; the Allied warship involved; the date it was sunk; its position; the depth and additional remarks. 01 Sep 1940 - 25 May 1943
CHAR 20/135/49-51 Tables noting the details of the U boats which are thought to have been damaged (A), recording: the number of the vessel; the Allied warship involved; the date it was sunk; its position; the depth and additional remarks. 09 Sep 1939 - 26 Apr 1942
CHAR 20/135/52-62 Tables noting the details of the German U boats which are thought to have been damaged (B), recording: the number of the vessel; the Allied warship involved; the date it was sunk; its position; the depth and additional remarks. 07 Sep 1939 - 15 May 1943
CHAR 20/135/63-80 Tables noting the details of the German U boats which are thought to have been slightly damaged (B), recording: the number of the vessel; the Allied warship involved; the date it was sunk; its position; the depth and additional remarks. 09 Sep 1939 - 07 May 1943
CHAR 20/135/81 Cover page marked "Italian U Boat Casualties Since 10th June 1940" and signed by C S Wright (Director of Anti Submarine Warfare). c 1940
CHAR 20/135/82 Chart noting the method of destruction for Italian U boats which have been sunk. c 1940
CHAR 20/135/83 Chart noting the method of destruction for Italian U boats which have probably been sunk. c 1940
CHAR 20/135/84 Chart noting the method of attack for Italian U boats which have probably been damaged. c 1940
CHAR 20/135/85-87 Graph showing the state of the Italian U boat fleet and recording the number of Italian U boats known to have been sunk and the number of U boats in operation in West and North West approaches and the Atlantic. c 1940
CHAR 20/135/88-94 A table recording information about the Italian U boats which are known to have been sunk, noting: the number of the U Boat; the Allied vessel concerned with it; the date on which it was sunk; its position; the depth and other remarks. c 1940
CHAR 20/135/95-96 A table recording information about the Italian U boats which are have probably been sunk, noting: the number of the U boat; the Allied vessel concerned with it; the date on which it was sunk; its position; the depth and other remarks. c 1940
CHAR 20/135/97 A table recording information about the Italian U boats which are have probably been damaged (A), noting: the number of the U boat; the Allied vessel concerned with it; the date on which it was sunk; its position; the depth and other remarks. c 1940
CHAR 20/135/98-102 A table recording information about the Italian U boats which are have probably been damaged (B), noting: the number of the U boat; the Allied vessel concerned with it; the date on which it was sunk; its position; the depth and other remarks. c 1940
CHAR 20/135/103-106 A table recording information about the Italian U boats which are have probably been slightly damaged, noting: the number of the U boat; the Allied vessel concerned with it; the date on which it was sunk; its position; the depth and other remarks. c 1940
CHAR 20/135/107 Chart noting the method of destruction of Japanese U Boats which have been sunk. c 1940
CHAR 20/135/108 Chart noting the method of destruction of Japanese U Boats which have probably been sunk. c 1940
CHAR 20/135/109 Chart noting the method of destruction of Japanese U Boats which have probably been damaged (A). c 1940
CHAR 20/135/110 Table recording the details of Japanese U Boats which have been sunk, noting: the number of the vessel; the Allied warship involved; the date; the position of the U Boat; its depth and any further comments. Jun 1941 - Dec 1941
CHAR 20/135/111-12 Table recording the details of Japanese U Boats which have probably been sunk, noting: the number of the vessel; the Allied warship involved; the date; the position of the U Boat; its depth and any further comments. 09 Jul 1942 - Dec 1942
CHAR 20/135/113 Table recording the details of Japanese U Boats which have probably been damaged (A), noting: the number of the vessel; the Allied warship involved; the date; the position of the U Boat; its depth and any further comments. 20 Jan 1942
CHAR 20/135/114 Table recording the details of Japanese U Boats which have probably been damaged (B), noting: the number of the vessel; the Allied warship involved; the date; the position of the U Boat; its depth and any further comments. 20 Jan 1942
CHAR 20/135/115-17 Table recording the details of Japanese U Boats which have probably been slightly damaged, noting: the number of the vessel; the Allied warship involved; the date; the position of the U Boat; its depth and any further comments. Sep 1941 - Dec 1941
CHAR 20/135/118-27 Bar chart recording the weekly sinkings of British, Allied and neutral merchant shipping, noting the loss in tonnage. 10 Sep 1939 - 13 Jun 1943
CHAR 20/135/128-30 Bar chart recording the monthly sinkings of British, Allied and neutral merchant shipping, noting the loss in tonnage. Sep 1939 - Feb 1943
CHAR 20/135/131-32 List of French Submarines sunk, noting the name of the vessel and where and when it was sunk. c 1940
CHAR 20/135/133 Note charting the loss of a Romanian U Boat which was sunk by a Soviet submarine in 1941. c 1941
CHAR 20/135/134 Table noting the details of the Midget Submarines destroyed, recording: the occasion on which it was destroyed; the date; the number destroyed and the nationality. c 1941
CHAR 20/135/135 Table noting the details of the Human Torpedoes destroyed, recording: the occasion on which it was destroyed; the date; the number destroyed and the nationality. 30 Oct 1940 - 11 Dec 1942