The St Peter Port Lifeboat was launched at 05:39 local time on Sunday 5th April following reports of a red flare sighting from Rousse Headland on the North-West of Guernsey.
The RNLB Spirit of Guernsey departed St Peter Port at 05:57 arriving on scene at 06:15 local time.
Weather conditions at the time were good with excellent visibility and calm seas.
The St Peter Port Lifeboat searched the area for approximately two hours whilst at the same time the shoreline, local moorings and car parks in the Rousse area were checked by Guernsey Coastguard.
With nothing being found both ashore and at sea and no further information forthcoming, the Lifeboat was stood down and was back on station at St Peter Port from 08:19 local time.