Real Submarine Technology & History Q&A

[LukeFF]

Originally Posted by DaveyJ576

Diving times were usually measured under the following parameters: boat fully surfaced and running at a standard bell (approx. 15 knots), and time to get to periscope depth. For the Gato/Balao/Tench classes PD was 65 feet. At the start of the war the fleet boats were credited with 50 second dive times. By the end of the war that was down to an average of 40 seconds. With a lot of training some boats were able to dive in 30 seconds. For a boat the size of the fleet boats this was pretty impressive.

Thanks as always, Dave! This info here made me realize how off I was on the dive times for RFB.