Royal Irish JPK 10.80 Rockabill VI skippered by Paul O'Higgins reigned in Saturday's first ISORA cross channel IRC race for over two years but with a winning margin of less than a minute after nine hours on the water.
The Dun Laoghaire yacht – which has won all its ISORA fixtures this season – had just 52 seconds over Welsh rival J109 Mojito, skippered by Peter Dunlop and Vicky Cox.
The yachts finished under spinnaker in light airs at tea time at Dun Laoghaire Harbour with respective corrected elapsed times of 9 hours 34 minutes and 28 seconds and 9 hours, 35 minutes and 20 seconds.
From a pre-race billing of over 20, a fleet of 17 came to the line at Holyhead in North Wales on Saturday morning with 13 finishers of the Musto sponsored race on Dublin Bay.
The fleet sailed into fog off the Irish coast that reduced visibility so severely that it led to the cancellation of the bulk of DBSC racing on Dublin Bay but cleared briefly around 6 pm to let the leaders at least finish in relatively clear conditions.
The line honours winner was the Grand Soleil 44 Samatom (Robert Rendell) of Howth, who finished on a corrected time of 9.46.35 to take third overall on IRC.
With IRC Zero victory going to Rockabill VI, second in the big boat division was Rendell's Samatom, with Andrew Hall's Pwhelli based J125 Jackknife second.
Second to Mojito in IRC One division was Paul Sutton's sistership and Pwhelli clubmate, Jaydreamer. In a J109 clean-up in that division, Simon Knowles was third in the Howth Yacht Club J, Indian.
IRC Class 2, Pwllheli Sailing Club's Pete Ashworth's Sunfast 3200 beat Mark and Jo Thompson's Sunfast 3200i.
Live Dublin Bay webcams here