A specially adapted trawler has joined a new search for the crew of the coastguard helicopter R116 off the north Mayo coastline.
It will use sonar equipment and nets to trawl the seabed near Blackrock Island today where the chopper went down last March.
The bodies of Captains Dara Fitzpatrick and Mark Duffy have already been found - but there's no trace of winchmen Paul Ormsby and Ciaran Smith.
Superintendent Tony Healy of Belmullet Garda station is coordinating the recovery. operation.