The Irish Coast Guard, Royal Navy, Royal Air Force, RNLI and Irish authorities were involved in the search, which was co-ordinated by the Irish Coast Guard maritime rescue sub centre at Malin Head, County Donegal.
The search from the air was carried out by the Coast Guard’s fixed-wing plane Rescue 120F, based in Shannon airport; Coast Guard helicopter Rescue 118, based in Sligo; and the Irish Air Corps plane, CASA 284, Ireland’s Department of Transport previously said.
There was also a search co-ordinated at sea by the UK naval support vessel and three RNLI all weather lifeboats based at Ballyglass, Arranmore Island and Lough Swilly, it added.