An unmanned remote device is set to leave for the Canterbury coast as an attempt to recover a sunken fishing boat that lost three crew members resumes.
The FV Jubilee sent a distress call on Sunday morning, from north of the Rakaia River mouth, prompting search and rescue efforts.
Searchers found an empty life raft and debris, but did not locate the three men that had been aboard the boat.
Attempts to recover the boat have been hampered by weather and mechanical problems, with waters too rough to attempt a recovery yesterday.
But police say they hope an unmanned navy device will be able to finally confirm if the wreckage - about 40m below the surface - is the Jubilee.
Inspector Craig McKay said a diving support ship, the HMNZS Manawanui, would leave the navy base in Devonport this morning.
The three crew members were on Tuesday named as Jared Reese Husband, 47, Paul Russell Bennett, 35, and Terry Donald Booth, 55.