Navigational markers in Camden Haven river lost by recent massive rainfalls

Boaters across NSW are being warned to be on high alert for navigation hazards with significant debris and missing navigation markers after the recent rainfall.

Marine Rescue Camden Haven unit commander Ken Rutledge said the water was a dangerous place for boaters at the moment.

"My advice would be to not go out on the water," Mr Rutledge said.

"There are a lot of logs and trees moving through the river at the moment and it is quite dangerous. You don't know what is under the water and with the navigational markers also moved things aren't great.

"On the weekend we even had a kangaroo come down the river so our message is to be extremely cautious."

Mr Rutledge said NSW Maritime were doing all they can locally to get the navigational markers back into place.

"Because there has been a lot of water coming through the river the makers have moved," he said.

"We know a few have floated out to sea and others are just in the wrong spot.

"It is not surprising but the markers play an important role in showing boaters where the deepest parts of the chanel are.

"With more rain expected later in the week my best advice is not to go out."

NSW Maritime Executive Director Mark Hutchings said the boating conditions are potentially so unsafe in many areas, it would be advisable to delay boating until flood waters have subsided and the clean up of waterways has taken place.

"Up and down the coast there is a significant amount of debris in the water and this is particularly dangerous when it is submerged or semi-submerged as it is impossible to know it is there," Mr Hutchings said.

"In Camden Haven, a starboard lateral mark which indicates where it is safe to navigate, has been dislodged and found in the surf zone at North Haven Beach, several kilometres away."

Mr Hutchings said the system of buoys, poles and lights helps boaters with safe navigation and guides boating traffic on NSW waterways.

"Without these navigation markers in place, there is the potential for vessels to run aground or get into difficulty while navigating," he said.

"There are literally hundreds of navigation markers up and down the NSW coast which have been swept 'off station' due to a combination of increased water levels, the speed of the water flow, and the volume of debris building up in the water."