UPDATE:
Police have brought in a special machine to assist them in their search for a missing 48-year-old man on Lake Rotoiti.
Rotorua constable Colin Fraser from Search and Rescue said the machine, called a sonar, meant they could search areas without the divers.
A sonar was a machine that used sound propagation to navigate, communicate with or detect objects on or under the surface of the water, he said.
"It will speed things up a bit. We are still confident we will find him. It's not a question of if he is there, it's just a matter of looking."