US military units in the Pacific have launched a major search operation after a ship's master was reported missing from a bulker off the island of Guam.

The 47-year-old mariner is said to have fallen overboard from the Panamanian-flagged 82,151-dwt Rising Wind (built 2014).

A US Coast Guard (USCG) C-130 aircraft, a US Air Force C-130 and the USCG cutter Sequoia were immediately deployed to join the search with the reporting vessel.