[CaptainHaplo]

As for launching "deep" - it was possible then, and possible now. The issue was and currently still is (until the water ram system is perfected) that a torp is fired using high pressure air - and so the deeper you go - the more air pressure (and thus actual air) you need to get the bugger out the tube. WW2 subs had alot less reserve air than a modern nuke boat - they are allowed to fire from 500+ feet as needed - although deeper is frowned upon. 2-3 hundred is preferable as modern torps can then dive to a preset depth. WW2 boats had little "reserve" air - so once the sonar approach (which was made around 100 feet) went by the wayside, it was VERY rare for a torp to be launched deep.