Champion JPK 10.80 Rockabill VI skippered by Paul O'Higgins completed Friday night's ISORA points-weighted night race off Dun Laoghaire Harbour in a time of four hours and ten minutes.
Light airs on Dublin Bay frustrated a number of competitors who retired, according to the race tracker.
Provisional results show the Royal Irish's Rockabill VI with the gun in line honours, IRC Zero and IRC overall.
The race tracker shows Robert Rendell's Grand Soleil 44 Samatom second in line honours and IRC Zero.
As reported earlier by Afloat, an ISORA Welsh night race will be held this evening.