More than 70 members of organisations, services and the community attended the morning gathering.

The garden's semi-circular design represents an "incomplete family".

Flowers in Marine Rescue's colours (white, blue and yellow) were planted with native plants to represent resilience.

READ MORE: Marine Rescue action: Vessel in flames, mechanical failures and fireworks

Each yellow grevillea was accompanied by a re-purposed silver spoon, engraved with the names of deceased members. A hardwood seat from Narooma Men's Shed is the centrepiece.

Unit administration officer Gillian Kearney said the day was special and meaningful and families of departed members attended.

"Everyone looked down on the garden and out to sea for one-minute's silence," she said.

"It was very emotional and something we did from the heart."

The "small unit" of 43 volunteers looks forward to the use of the refurbished radio room and storage shed.

"The additional radio console will make communication much easier and more efficient," Ms Kearney said.

"The signal is very clear and we can communicate with other bases.

"The storage shed was also repaired with new roller doors which were previously falling apart."

Bega MP Andrew Constance thanked volunteers for their service and said volunteerism allowed government to direct funding towards infrastructure and facilities.

Commissioner Stacey Tannos said Marine Rescue NSW had helped more than 50,000 people return home safely from their outings.

"In response to calls for assistance, over the past 10 years, volunteers from Marine Rescue had assisted to bring 50,000 people safely back home," he said.

"We look forward to taking on more equipment and improving our capabilities for many years to come."

The project follows a NSW Government statewide $37.6 million cash injection to cleanup radio blackspots and upgrade equipment over the next four years.