Police are bringing in specialist Navy equipment to find a missing boatie in the Hauraki Gulf, after recovering the sunken boat and narrowing the search area.
A fishing trip ended in five friends having to swim for their lives after their boat capsized and sank off Kawau Island around 3pm last Tuesday.
Three men and a 13-year-old boy were rescued from Motuketekete Island on Wednesday morning after spending the night in near-freezing conditions.
Police are still searching for Warkworth man Anthony Preston, 41.
Maritime police found the 5.5m aluminium vessel yesterday after boaties saw a line in the water and told police.