IRC Class 0 J125 entry Jackknife skippered by Andrew Hall of Pwllheli Sailing Club was the winner of ISORA's 120-mile Race Ten from Dun Laoghaire to Pwllheli on Saturday.
The race was won in an IRC corrected time of 14 hours 35 minutes and one second.
The Class Zero entry beat classmate Nigel Ingram's Farr 30 Wild Haggis for the top spot in the nine-boat fleet.
Third was Howth Yacht Club's Robert Rendell in the Grand Soleil 44, Samatom.