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| FM/DM threads Everything about FM/DM in CoD |
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#11
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1939:
Allied and Neutral ship tonnage sunk by German and Italian submarines (#ships, GRT) Sep39 48/178,621 Oct39 33/156,156 Nov39 27/72,721 Dec39 39/101,823 Tot39 147 (36.75/month)/509,321 (127,330.25/month) British merchant ship construction capacity from 1939-1941 did not exceed 1.2 million GRT per year. US merchant ship construction in 1939 was 0.242 million GRT. Number of U-Boat patrols (combat patrols only, does not include tanker/resupply missions)/losses/aborts prior to contact in principle theaters (North Atlantic, South Atlantic, Indian Ocean, and the Americas) Aug39 19/2 Sep39 3/0 Oct39 13/3 Nov39 10/1/1 Dec39 5/1/1 Tot39 50/7/2 (an average of 10 patrols per month and 14% lost) Thus for 1939, an average of 2.94 ships were sunk per patrol and one U-Boat was lost per 21 ships sunk (note that throughout these averages will be slightly inflated since they do not include the minor contribution of the Italian submarine fleet.) 1940: Allied and Neutral ship tonnage sunk by German and Italian submarines (#ships, GRT) Jan40 53/163,029 Feb40 50/182,369 Mar40 26/69,826 Apr40 6/30,927 May40 14/61,635 Jun40 66/375,069 Jul40 41/301,975 Aug40 56/288,180 Sep40 60/288,180 Oct40 66/363,267 Nov40 36/181,695 Dec40 46/256,310 Tot40 520 (43.33/month)/2,462,867 (205,238.91/month) US merchant ship construction for 1940 was about 0.5 million GRT. Number of U-Boat patrols (combat patrols only, does not include tanker/resupply missions)/losses/aborts prior to contact in principle theaters (North Atlantic, South Atlantic, Indian Ocean, and the Americas) Jan40 8/2 Feb40 10/3 Mar40 10/2 Apr40 19/3 May40 8/0/2 Jun40 18/3/1 Jul40 4/0 Aug40 16/2/1 Sep40 12/0 Oct40 13/2 Nov40 14/1 Dec40 6/0 Tot40 138/18/3 (an average of 11.5 patrols per month and 13% lost) |
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