Two overturned boats off Tweed Heads on Sunday were among 50 calls for assistance received by Marine Rescue units along the NSW coastline at the weekend.
In the first incident, one of the two people on board was picked up by a jet-ski operator and taken to shore.
The other had been rescued by another vessel and was transferred to Marine Rescue vessel Point Danger 30 and taken to a waiting ambulance for transport to hospital.
Three people from the second vessel were rescued, with one requiring medical attention for minor injuries sustained.
MRNSW Northern Rivers Regional Controller Stephen Reading said marine rescue units responded to 23 calls for assistance on Saturday, and 27 more by 5pm on Sunday.
Deputy Commissioner Dean Storey said that with the exception of the Tweed Heads incidents, reports indicated that all problems were mechanical, electrical or fuel related.
“The fine weather for the official start of the boating season has seen large numbers of vessels take to the water with a high proportion of breakdowns caused by mechanical problems,” he said.
“All boaters should ensure their vessels are ready for the boating season, especially those that might not have been used since last summer.
“In fine weather with calm seas, skippers can radio for help. The worst result of the breakdown can be simply an interrupted day. In poor conditions, a breakdown can be life-threatening.
“A rigorous boating safety check at the start of the season can be some of the best insurance a skipper can take for a safe and trouble-free boating season.
“Make sure everyone on board is wearing a lifejacket and log on with your local MRNSW volunteers by your marine radio or the free MarineRescue App for smartphones.”