Originally Posted by
engineer(retard)
I recall being told that a near miss to a ship with a 1000lb would be good enough as the compression wave would burst bulkheads. No idea if that is true though.
Depends on "how near" and the depth of the explosive at time of detonation.
If it blew up underwater it could approximate the explosion of a torpedo warhead. On a small to middle sized warship it could do some serious damage. (What is the weight of explosives in a 1000 pound bomb? How much is iron and how much is explosive charge?)
If it blew up "just right" in terms of where getting more or less underneath the ship as it explodes, it might create that bubble under the keel that submariner's torpedoes can achieve, which could cause severe structural damage to the main strengthening member of the ship's structure.
So "it depends" is the answer.