The Navy has confirmed the wreckage of a sunken vessel found last year off Alaska's Aleutian Islands is that of the USS Grunion, which disappeared during World War II.

Those onboard included 16-year-old Seaman 2nd Class Byron Allen Traviss of Detroit. A family member says he lied about his age to join the Navy.

The Navy says underwater video footage and pictures captured by an expedition hired by sons of the commanding officer helped the Navy confirm the discovery.

The Grunion was last heard from July 30, 1942.

The submarine reported heavy Japanese anti-submarine activity at the entrance to Kiska Island.

That day, the Grunion was directed to return to Dutch Harbor Naval Operating Base. The submarine was reported lost Aug. 16, 1942.