Depth Capabilities of subs/uboats

[Ducimus]

Here you go Sailor steve, found the reference:
http://ibiblio.org/hyperwar/AAF/USSBS/IJO/IJO-63.html


Interrogation of: Lieutenant Commander OKAMOTO, T.; Staff Officer of First Escort Fleet Air Squadron and (general Headquarters, Grand Escort Fleet.

Interrogated by: Commander T.H. Moorer, U.S.N

Q. What size of depth bombs did your aircraft use?
A. 250 kg.

Q. Did you use any other airborne weapon besides depth bombs?
A. We had nothing besides bombs. The bomb was a standard 250 kg bomb with a modified flat nose attachment and a special tail, a nose and tail fuse was used.

Q. What depth setting did you use?
A. We used 25 and 45 meters. If the submarine was discovered near a convoy at periscope depth and immediately submerged, we dropped the 25 meter; if time passed and gave the submarine time to go to a lower depth, we would drop the 45 meter bomb.