The men had been travelling on the water scooter across the North Channel from Ballycastle in Northern Ireland to Campbeltown in Scotland and back - a round trip of some 130km - but ran out of fuel on the return leg, and drifted to Corsewall on the north point of the Rhins of Galloway.
The RNLI Stranraer lifeboat launched at 5.20pm from Lady Bay and 20 minutes later arrived on scene, where they discovered that two of the men were cold and one had an ankle injury - although a conflicting report via the Belfast Coastguard says only two men were found.
The men were transferred safely on to the lifeboat and taken to Dally Bay, from where they were taken by road to Stranraer Accident and Emergency Hospital.
But as BBC News reports, they were beset by further problems on their return trip to Northern Ireland later that evening, when the private vessel on which they were travelling also ran out of fuel and had to be towed to Red Bay in Co Antrim.
Belfast Coastguard confirmed to the BBC that the men had been travelling on their water scooter with "no navigational aids" and that "they could not get a signal from their mobile phone".