A crewman died this week in an explosion aboard the Bering Sea factory trawler Alaska Ocean, Unalaska police said.
Preliminary investigation found that welding set off gas inside a storage locker that held a leaking acetylene tank, said Mike Holman, Unalaska deputy chief.
The blast unhinged the locker door, which struck Franz d'Alquen, 48, from Arizona. He was declared deceased shortly thereafter.
The accident happened at 9:20 p.m. Tuesday. The Alaska Ocean was about 165 miles out of Unalaska at the time.
The 376-foot vessel belongs to Seattle-based Glacier Fish Co.
The body has been sent to the state medical examiner's office, Holman said.