[RustySubmarine]

As a ex submariner aboard an "O" Class Sub during the late sixties, you can definitely hear a sort of muffled sound, ( Similar to gravel or pebbles hitting the boat as Steve has mentioned). This depending if the attacking ship is within a certain range. You don't get a ping like the sonar operator hears. One thing I can definitely confirm, is that you do hear Mortar Bombs (these were fired from tubes on Anti Submarine Frigates) with a range of 600 yards. These live bombs fired in a spread pattern, (toned down versions were used on exercises), but were not powerful enough to cause any serious damage, but they did rattle things inside the boat and shake it about a bit, if they detonated close too. Quite an experience, but I'm glad I wasn't in one of the Uboats, where proper Depth Charges & Hedgehogs were used, these were certainly more lethal than the practice equivalents used in peace time.


Seems Iv'e reached the dizzy heights of an Engineer now,with 200 posts. That is what I was when I was in the RN. Petty Officer Engineering Mechanic.
Got a lot of catching up to Sailor Steve, with almost 44,000 posts. Is he The Admiral Of The Fleet?