I think the "deep" on the map indicates anything from 300 to 8000 feet, shallow can be anywhere from 1 to 150 feet. So ping at depth to keel 100 DUK 680, 780 feet actual depth.
350 plus 30 DUK = 380, it's entirely possible for the bottom to rise 400 feet in a few hundred yards or less, and that wouldn't be shown on the oversimplified chart in the game.
"If you're at battle stations you'll see some crew doing repair"
That's why I keep the damage control slots empty unless it actually needs repair, that idiot standing by the forward planesman prying on a gear with a screwdriver always makes me want to rig a grating and tell the bosun to get his cat-O-nine-tails.
