Today marks the first anniversary of the Rescue Helicopter 116 crash off the north Mayo coast.
Four crew members were onboard when the Coastguard helicopter went down near Blackrock Island in the early hours of March 14th 2017.
The bodies of Captain Dara Fitzpatrick and Captain Mark Duffy were recovered, however Paul Ormsby and Ciarán Smith remain lost at sea.
Over one hundred family, friends and loved ones attended the candle lit vigil last night, as well as members of various agencies including the Irish Coast Guard and An Garda Siochana.
Further memorial services will be held in honour of the crew this morning on the first anniversary of the tragedy.
An anniversary mass is planned for 10am at St Brendan's Church, Tirrane while a wreath laying service is due to take place at the Blacksod lighthouse later this morning.