Marine Rescue Bermagui unit commander Caron Parfitt said her team received a call about 5pm on Sunday evening that a vessel was experiencing mechanical problems about 15 nautical miles north-east of Bermagui.

"The guys did the right thing and made the call early, which allowed us to send our volunteers tasked with the rescue vessel BG30," she said.

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The boaters also had a member of the public with their own vessel waiting on call if they needed help, but were not required as Marine Rescue conducted the operation.

Ms Parfitt said it was a reasonably calm night and the two people and their 7.3metre motor cruiser were returned to the harbour about 9pm, with both occupants safe and uninjured.

By Monday afternoon their boat had been taken home and Ms Parfitt said it was "one of those unfortunate things" that despite the occupants keeping their boat in as best condition as they could, there was still mechanical problems.

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It has been a mostly quiet first half of the year for Marine Rescue Bermagui, as once the COVID-19 restrictions began the team ceased regular training to protect its members, but remained available for any emergencies.

However, Ms Parfitt said the only other incident over that period was when a trawler ran aground on a beach north of Bermagui, but it was able to be towed free by the surf life saving club and another trawler.

She said while Sunday's incident had a positive resolution, "boaters need to be aware that things can go wrong and be ready to call Marine Rescue if they need help".

She said boaters should make sure they have a safety plan, were lifejackets, have safety gear onboard and make sure they carry a mobile phone.

Marine Rescue Bermagui has returned to active training as of last week.