The resident, who didn't want to be named, said immediate action should be taken.

The 15 metre steel sailing boat sunk on a mooring at the Laurieton Coop on August 16 and NSW Maritime were alerted to the incident.

Fire and Rescue NSW, the lead agency for marine pollution in the Camden Haven and inland waters area, attended and placed a containment boom around the vessel as a precaution.

On September 20 NSW Maritime executive director Mark Hutchings said the organisation had taken custody of the vessel and is taking steps to have the vessel removed from the water.

"This follows repeated attempts by NSW Maritime to have the boat owner remove the vessel," he said.

A spokesperson for NSW Maritime said in August officers issued regulatory notices for the owner, who is responsible for the salvage.

This was for the owner to submit a plan for removing the vessel from the water, under environmental legislation.

Mr Hutchings said NSW Maritime will continue to monitor the vessel and to date, there has not been any evidence of pollution.

The organisation will attempt to recover any costs incurred through a legal process.

On August 15 local crews from Birdon Contracting used a crane to transport a derelict vessel from the emergency mooring on Laurie Street, Laurieton to the tip.

Transport for NSW was seeking about $20,000 from the owner to cover the cost of salvaging the 11-metre ferro-cement sailing boat.

Mr Hutchings said a poorly maintained vessel can sink, polluting the waterways and the environment. He said it can also be a hazard to navigation.

NSW Maritime is working with boat owners to ensure waterways across NSW are safe. Crews are carrying out regular checks to ensure private moorings are compliant.

For more information about mooring types and requirements, visit https://www.rms.nsw.gov.au/maritime/moorings/private-moorings.html