The family of the skipper missing off Fiordland with his teenage crewman are making their way to New Zealand from Australia.
Kevin Cosgrove, 60, and Nirvana Drew Reynolds, 16, have not been seen since their boat failed to dock at Milford Sound on Saturday.
An extensive search and rescue operation has been taking place in the hope of finding the pair.
Today a family spokesperson said Cosgrove's ex-wife and daughter are on their way to Greymouth to be with his son.
Cosgrove is originally from Bluff, where his parents still live.
The family spokesperson described Cosgrove as a "very careful sailor" who knew the dangers of fishing, not just off the west coast, but everywhere.
They said they "accept it's highly unlikely his body will ever be found".
Earlier police said they are disappointed they have not yet been able to locate the two fishermen after discovering the wreckage of their boat yesterday.
It is believed the vessel got into difficulty after its fishing net became snagged near Yates Point, north of the mouth of Milford Sound.
An extensive search and rescue operation located the fishing vessel, The Governor, approximately 2.5 kilometres off shore from Yates Point and 50 metres under the surface.
Search teams are consulting with police dive squads about whether it is safe to dive down to the boat, or send a remote observation vehicle to view the wreckage.
However, weather in the area has closed in and this could prevent search teams from diving down until Wednesday or as late as next week authorities said.
Police said given the tide and wind at the time of the accident, they believe the men did not make it to shore and they are not expected to have survived.