A search is on for a missing helicopter pilot after the aircraft was forced to make an emergency landing in the ocean about 35km north-west of Port Hedland.
The search-and-rescue operation co-ordinated by the Australian Maritime Safety Authority was continuing on Thursday morning.
A two-person crew was aboard the helicopter, a twin-engine EC135, when it ditched in the water just before midnight on Wednesday.
The aircraft was on its way to the bulk carrier MV Squireship to collect a marine pilot and return them to the harbour.
The marine pilot on board Squireship witnessed the helicopter ditch into the water and immediately notified harbour control, which in turn advised AMSA just before midnight.
The AMSA also detected a distress beacon from one of the helicopter’s crew members. Four flares were seen in the search area shortly after the crash.
One of the helicopter’s crew, suffering minor injures, was rescued from a life raft by another boat crew at about 1am. He was taken to Port Hedland Hospital.
The second crew member, the helicopter’s pilot, is still missing.