Navy crew are using sonar equipment to search Wellington Harbour today for kayaker Cameron Millar, missing for four days.
Police say there is little chance of survival for the 19-year-old after he was tipped from his kayak and became separated from his paddling companion late on Wednesday afternoon. He was not wearing a lifejacket and his kayak was found on the shore and a rucksack and paddle in the water of the harbour.
The water temperature in Wellington Harbour is about 10degC.
An intense search, involving boats, helicopters, divers and searches of the shoreline, since then has been unsuccessful and police asked for the navy's assistance with the use of sonar equipment. The equipment is being used for the first time today.
Mr Millar's parents Ross and Jo Millar yesterday went on the police launch Lady Liz IV to Ward Island, off Eastbourne, near where Mr Millar was last seen, as divers continued searching for him.