Being constructed by Harwood Marine the new rescue vessel has an overall length of 13.6 metres, a beam of 4.15 metres and a draft of one metre.

It will be powered by twin Yanmar 6LY440-CR diesels with a top speed of 32 knots and a cruising speed of 25 knots.

The range of the vessel at cruise speed is 300 nautical miles.

Marine Rescue JB publicity office Ron Walsh said the new vessel will have a flybridge with controls that can accommodate two people.

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"Having the flybridge will mean a better, more efficient search capability with the extra height above water," Mr Walsh said.

"A carbon fibre removable davit is also fitted to assist with lifting people/objects from the water and the aft duckboard can be raised or lowered hydraulically."

The vessel will also be equipped with a Zipwake Interceptor Dynamic Trim System for improved stability and optimum running when underway.

Marine Rescue JB is also working with Shoalhaven City Council on a proposed major upgrade of its rescue unit complex at Huskisson, which will see the complex transform from an effective radio room into a fully functional Maritime Search and Rescue Coordination Centre.

The plan for the complex, located in Voyager Park at Huskisson, overlooking both Jervis Bay and the opening to Currambene Creek, will enable volunteers to more efficiently deliver emergency rescue services through the addition of new technologies, professional training facilities and improved amenity for volunteers.

The proposed works will expand training facilities, upgrade radio room space accommodating digital radio technology, while meeting council's need for a first aid room, swimming pool maintenance facilities along with the existing accessible public toilet and showers.

Improvements in building access will enable members of the community with limited mobility who are currently unable to, to safely enter the premises and become volunteers.