I'm still wondering how the Zumwalt and the Burke class ships are called destroyers, with 27-30' draft and 10-15 K tons displacement. Given that getting holes inflicted below the waterline is much more of a problem than above, seems we could use more (smaller/lighter/cheaper) asw-capable cans to mix in with the aaw-capable ones. (They're light cruisers- mind the price tag.) Used to be, a destroyer was a 20-22'-draft 3-3.5K ton ship. The aaw-capability is hugely expensive, what with aegis. Variety is the spice.
Nobody fires torpedoes any more! Although, you are 100% right! I was on a tin-can, FF, Knox class and as my memory serves, she only was 16 ft at it's deepest.