Battleship <i>Arkansas</i> <a class="external autonumber" href="https://en.wikipedia.org/wiki/USS_Arkansas_(BB-33)">[1]</a> lying upside down at a depth of 180 feet in Bikini Lagoon.  Diver's sketch from a 1989 National Park Service dive.
National Park Service, Jerry Livingston and Larry Nordby
Delgado, James P., <i>et al., The Archeology of the Atomic Bomb</i>, National Park Service, Santa Fe, New Mexico, 1991, p 95.