A worker carrying out a coastal survey was airlifted to hospital after being knocked over by a wave.
The man was winched to safety from the base of a cliff at Kerry Head shortly before 12 noon by the Shannon-based Coastguard helicopter.
He was transferred to Kerry General Hospital for treatment for his injuries, which are not thought to be life threatening.
A spokesperson for the Ordnance Survey Ireland said a member of its staff undertaking a coastal survey, as part of a team surveying at water level at Kerry Head, Co Kerry, was hit by a wave and knocked over on rocks.
The man was working at water level when the incident occurred, and did not fall off a cliff.
"The three members of the survey team were wearing their full complement of protective equipment, including helmets, life-jackets, and harnesses, and also were anchored to the rocks with climbing ropes," he said.
"As a precaution, the lead surveyor called on the assistance of the emergency services which airlifted the surveyor to Kerry General Hospital. He suffered no apparent injuries but was being detained for observation."
The rescue was coordinated by the Ballybunion Sea and Cliff Rescue Service with the assistance of the Ballybunion and Glenderry Coastguards and the Fenit Lifeboat.