A few more interesting statistics courtesy of the United States Submarine Data Book from the Submarine Force Library and Museum Association. Thought this would be a good thread to post them in.
US World War II Submarine Operational Summary
Maximum number of submarines in US fleet = 288
Number that made war patrols = 263
Number of war patrols made by U.S. submarines in the Pacific = 1,474
Number of days at sea by those submarines in the Pacific = 70,838
Number of Japanese ships attacked by submarines = 4,112
Total number of Japanese ships sunk by submarines = 1, 392
Average number of merchant vessels sunk per war patrol = 0.80
Average number of naval vessels sunk per war patrol = 0.145
Number of Japanese ships sunk per U.S. sub lost in action = 1,392 / 41 =33.95
Average number of all types of ships sunk per war patrol = 0.945
Number of airmen rescued by submarines = 504 by 86 submarines
Number of submarines lost on war patrol = 41, or 1 out of every 6.41 subs =15.59%
Number lost due to all causes = 52 out of the 288 in the fleet, or 1 out of every 5.54 subs = 18.06%
Duration of the Pacific War = 1,347 days
In addition, half of the 52 U.S. submarines lost during World War II, were built prior to the beginning of the war. Nine U.S. submarines were lost during their second patrols, more than on any other patrol period.
U.S. submarines made 1,588 patrols during World War II; 1,474 in the Pacific, 87 in the Atlantic, 22 in European waters, and 5 in North African waters.
Forty subs made at least 10 patrols. 39 made 11; 8 made 12; 12 made 13; 7 made 14; and 5 made 15. Stingray was the only U.S.sub to make 16 war patrols.
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--Mobilis in Mobili--
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