Quote:
Originally Posted by Lee Enfield
http://en.wikipedia.org/wiki/Gato_class_submarine
Bigger than a German TypeIX, the Gato's were early shallow water boats, restricted to diving @300', they were obsolete from that perspective before the war started for the US, as
German boats were regularily exceeding 700-900' in combat emergencies.
Source? No WW2 German U-boat had a deep dive depth of 700-900 feet. The test depth for a Type IX u-boat at the end of the war was 750 feet, but the test depth is NOT the operating depth. The test depth includes the factor of safety, after which hull failure/crush is virtually assured on a NEW submarine. As WW2 boats aged (modern cathodic protection didn't exist and neither did modern high-tensile, High modulous of elasticity steels), their dive depth bacame more and more restricted until the hull was worn out. To minimize this, deep dives were a rarity. Forget what you've seen in Hollywood moview like U-571 - pure tripe.
The Gato class was an excellent submarine built for long depolyments. It could circumnavigate on one load of fuel and was considered most excellent by the US, the envy of her allies when they were still current. it was NOT a littoral submarine, it was blue-water.
The typical operating depth for Submarines in WW2 was about 200 feet. Very shallow by today's standards. Modern normal operating depths past 600 feet were not realized by hunter/killer submarines until the development of specialized submarine hull steels like the HY80-series steels used by the USN during the cold war, initially for use on Nuclear submarines.
Hey C2 I think you missed the highlighted part of my comment;
"combat emergencies".
VIIA - 722' (produced 1935-37)
VIIB - 722'
VIIC - 722' (@568 produced 1940-45)
VIIC/41 - 820' (@90 produced @42-45)
.fact-index.com/t/ty/type_vii_u_boat.html
.wordiq.com/definition/Type_VII_U-boat
.uboataces.com/uboat-type-vii.shtml
://en.wikipedia.org/wiki/German_Type_VII_submarine
You are correct that WW2 submarines operated at a much shallower depth than modern subs. The reason for that was that the design purpose of ALL submarines pre-@1955 was to attack surface shipping while avoiding detection by enemy surface warships.
Yes, the US Fleet type subs (and most Japanese) were designed to similar purposes as the German WWI U-Cruizers, extreme long range patrol boats, spending most of their time on the surface. They were designed for large crews, and crew comfort, whereas most of the WW2 European designs were combat weapons where the crews "hot-bunked" with the next watch.
They were excellent long range patrol boats, crippled for post-war use by their inferior dive depth capabilities.