I have read that early in the war it was a very real threat. I don't think it was as bad as trying to cross the Bay of Biscay in 1943 for the German U boats, but it was definately on their mind. Read of several occasions where a crash dive was initiated because a jumpy sailor standing watch spoted a seagull
In Ed. Beech's book Submarine he spoke frequently of spending their days at periscope depth and comming up at night to charge batts and make up the distance when off the coast of Japan.
Bowfin is a good book too. Read it back in HS while playing Silent Service on the C128 (Old School

). Never read of them engaging aircraft either. Always dive as soon as radar picked up a blip. AA weapons on submarines sunk way more sampans than aircraft.
Most submarine cmdrs didn't like aircraft at all regardless of the insigna on the wing. Too much of a chance to be mis-identified. Nothing sucks more than being sunk by your on guys. (RIP Seawolf

) Has anyone had a friendly attach in SHIV? Just currious if that was considered in prog the AI.
Capn_Sinky
O.I.C.I.C.
Officer In Charge of Ice Cream
USS Drum