THE search for a missing Golden Beach man at Lake Wellington was still underway, with police conducting an air search last Friday, and the State Emergency Service combing on foot.
It is understood 48-year-old Trevor McKie and his 72-year-old father from Sale were in a small boat on the lake on Sunday, July 19, towing a larger boat.
The younger Mr McKie took the smaller boat to refuel before 4pm, leaving his father on the large boat.
It is unclear what happened to the younger Mr McKie after he headed back towards his father.
His father returned to shore in the larger boat, and was taken to hospital for observation.
Police divers found Mr McKie's phone on Wednesday, and his boat was found at Tucker Point last Monday, but Mr McKie remained missing as of Monday morning.
A specialist search and rescue unit has been on the scene since Monday last week, including divers, Police Air Wing and Water Police, the Coast Guard, and the SES.
Police thanked the community for their exhaustive efforts in recent days, and encouraged people with information to phone CrimeStoppers on 1800 333 000.