"DDAY" wrote in
link.net:

I've been doing some research on old Navy missile tracking ships and came
across the story of the American Mariner, which was a converted freighter.

A website says that at the end of its career in 1966, the AM was sunk in 20
feet of water in Chesapeake Bay near Lookout Point to serve as a "target"
for Navy jets flying out of Pensacola. There's also a picture of the hulk
in 1985 (nearly two decades later).

Pensacola?
Oceania surely....

IBM