[TorpX]

Originally Posted by Dronston

Can you confirm they would simply float (in easy waters), or am I hugely mistaken?

Torpedos are slightly heavier than water; that is maybe having a negative buoyancy of 300 to 500 lbs. or so. So, if a torpedo is launched, and the propulsion should fail for some reason, it will sink. This makes a good deal of sense, as otherwise the torpedo could float up and hit some part of the sub, or give away their location.