The Navy's "Self Defense Test Ship," an aging, decommissioned destroyer, is vital to security, but there's no clear plan to replace it, watchdogs say.

Following a marathon four and a half year excavation, archaeologists in Croatia have excavated a remarkably well-preserved 2,000-year-old Roman navy ship, Ancient Origins reported. The vessel, ...

Some retired vessels from the U.S. Navy go on to serve as artificial reefs, while others are completely scrapped. But some go on to become floating museums.