There is still no sign of the missing helicopter crewmen Ciarán Smith and Paul Ormsby, despite one of the largest sea searches ever undertaken today.

More than 100 civilian ships and small boats came together today with the Naval service, the RNLI and the Irish Coast Guard, in a combined effort off the Mayo and Donegal coasts.

The RNLI's Garrett Morrison says it's disappointing but there's great appreciation for the civilian effort that was made today.