Up to 120 people will resume the search operation this morning for missing Co. Armagh man Daryl Burke.
The 30-year-old is feared drowned after the boat he was in sank in Lough Ree, near Athlone last Thursday.
A 60-year-old man remains in a critical condition while a 27-year-old man died in hospital last Friday after both were taken from the water following the incident.