The Lough Derg RNLI lifeboat was called to assist two people who got into difficulty on board a yacht on the lake last night.
The alarm was raised at around 8.30pm when the Irish Coast Guard received a report of a 26ft yacht aground south of Coolbawn, on the Tipperary shore.
On reaching the scene, two RNLI volunteers entered the water and waded to to the casualty vessel. The yacht had run aground on a rock shoal and left stranded in just a 2 feet of water.
The RNLI crew checked the boat and once satisfied that it was not holed, set up bridle and tow. One rescue crew member remained on board and the other returned to the lifeboat.
The vessel was taken gently off the rocks and towed into deep water, where the lifeboat removed the tow and the yacht made way using its outboard motor. Both passengers were found to be safe and unharmed and wearing their lifejackets.
The incident was coordinated by watch officers at the Irish Coast Guard marine rescue sub centre on Valentia Island in Kerry.
Meanwhile, the Killaloe unit of the Irish Coast Guard was called out to assist the National Ambulance Service with a medivac operation near Woodford in Co Clare on Saturday morning.
The volunteer teams was alerted at 11.50am requested to provide support for ambulance paramedics and the Shannon based Irish Coast Guard helicopter.
The helicopter had been called into airlift a casualty, who had been injured in a farm incident, to hospital.