The veteran radio operator told the skipper to take shelter alongside bigger vessels in seas being whipped up by strong easterly winds and when he arrived at a lodge on Preservation Inlet to advise Bluff authorities they had arrived safely.
But the Munetra never arrived and there had no been reported sightings from fishing fleet who were in the same area.
Leask said the skipper acted in a headstrong manner and disregarded basic safety advice.
He had left Bluff without filing travel plan and was using an inadequate VHF handheld radio as his only means of communication.
Leask said the alarm was raised this week when a friend of one of the female crew members reported the vessel overdue.
The skipper's employer was also concerned when he did not show up for work.
The coastguard had mounted two aerial searches in recent days with a fixed wing plane and a helicopter scouring the seas for signs of the craft.
A small search team would go out today combing the sea around the Mutton Bird Islands.
Police said they were still uncertain about the identities of the women on board the missing craft and would not be releasing their names until next of kin had been notified.