[Wiz33]

This is where Dangerous water got it wrong. Your crew cannot monitor sound from all around the sub at all time at max range. If you have a possible contact and is actively (not active sonar) listening in that direction. You might pick up a far away launch. If not, you may not detect the torp until you pick up the screw noise or until the sonar goes active. Also, a Real world tactic is to launch from tubes on the side of the sub away from the contact to use the hull to help block the launch tanscient which I don't think is currently modeled in game.