Five people including a child had to be rescued on Lough Derg on Saturday night in what was the eight incident on the lake in less than three weeks.
The Lough Derg RNLI Lifeboat was alerted at around 7.25pm and requested to launch and investigate a report of a 24ft boat broken down and drifting in Force 6 winds..
The boat had only just left Garrykennedy on the Tipperary side of the lake and was destined for Mountshannon, Co Clare on the western shore.
The lifeboat launched at 7.35pm and raced to the scene while staff at the Irish Coast Guard marine rescue sub station on Valentia Island maintained radio contact with the crew of the casualty vessel.
The rescue crew located the casualty vessel 15 minutes later between Parkers Point and Garrykennedy.
An RNLI crewmember transferred across to the casualty boat and found that all on board were safe and wearing their lifejackets. He reassured the passengers before setting up a tow line.
The lifeboat towed the boat back to Garrykennedy, where it was safely tied up alongside.
The skipper of the cruiser thanked the RNLI crew for their speedy assistance and confirmed that he raised the alarm himself.