Boats, aircraft resume search for missing fisherman

He had left Batemans Bay Marina on the NSW south coast about 6am in an eight-metre Arvor cruiser.

Contact was made with the man about 10am but when he failed to return that night emergency services were called.

The search by vessels, fixed-wing aircraft and helicopters, led by the Marine Area Command, continues on Monday.

Marine Rescue NSW Inspector Stuart Massey said the crews from Narooma, Bermagui and Merimbula are determined to find the 56-year-old.

"All of our dedicated volunteers are tired but ready to continue ... they are an incredible group of committed people," he said.

There were almost 30 volunteers on the water across six vessels on Sunday, covering an area from Ulladulla to Merimbula and up to 22 kilometres seaward under the direction of police, Mr Massey said.