The UK-registered yacht en route from Kinsale to Crosshaven broadcast a PAN PAN alert after its skipper spotted smoke in his engine bay.
Crosshaven’s crew of Warren Forbes, Denis Cronin, Aidan O’Connor and Derek Moynan were paged at 4.13pm and launched their inshore lifeboat to the reported position.
Once on scene, they assessed that there was no fire in the engine bay, but that the engine was disabled.
The casualty vessel was then towed to Crosshaven boatyard and safely berthed.
Crosshaven RNLI helm Warren Forbes said: “A fire onboard a vessel is a sailor's worst nightmare but fortunately no fire was observed when we arrived on scene.
“The yachtsman made the correct decision by not opening the engine bay and calling for help.”
Fortunately the swimmer managed to get to safely back to shore as the inshore lifeboat arrived at the scene.