The diver whose body was found at an Auckland lake yesterday has been named as Tyrone North.
The 37-year-old South Auckland man was part of an eight-person trainee group diving at Lake Pupuke on Auckland's North Shore which reported problems about 1.45pm.
Another student diver remained missing and the police national dive squad would continue to scour the lake today, police spokesman Kevin Loughlin said.
The missing diver's name has not been released.
The police dive team from Wellington arrived at the lake last night but the conditions were unsuitable and the search was called off for the night. The search resumed at first light today.
Specialist sonar equipment was being used today to search the lake in depths of more than 30 metres and a barge with a platform had been set up 100 metres from the shore as a base, Mr Loughlin said.
Police also carried out another shoreline search earlier this morning.
It was not yet known what caused the tragedy.
A third diver was also injured in the water and was taken to hospital for further medical treatment. That diver has since been discharged.
The training dive team was made up of five students and three trainers from Tauranga-based outdoor education provider Adventure Education.
Adventure Education general manager Sharon Sutherland last night said the team's total focus was on finding the missing diver and they were helping police with their investigations.
"We will be doing a thorough investigation into what has happened here today, but our immediate priority is to find the missing person."
A group of young men from the dive course watched as Mr North's body was taken away, the New Zealand Herald reported.
They then walked on to a jetty for about three minutes and appeared to pray.
An autopsy on Mr North would be carried out today.
Malcolm Kidd of the Dive Centre told the newspaper he knew another group had cancelled their dive at the lake yesterday because of poor visibility caused by a week of heavy rain, but he did not think the divers would have got into trouble because of the conditions.
"The issue I don't think really is environmental. I think it has to either be an equipment malfunction which has happened to one diver and two others have tried to save them.
"Or a person's run out of air and the other two have tried to stop them bolting for the surface ...
"Instead of doing a proper out-of-air procedure - going up to your buddy and sharing the spare mouthpiece that everyone has, they've panicked and bolted to the surface and they've tried to stop them."
The Department of Labour said an inspector had been sent to the lake to make initial inquiries.
