The notorious variable northerly wind in Schull Harbour, West Cork, created a problem for Calves Week OD Alan Crosbie, who cleverly devised a short cross harbour starting beat before sending the various fleets on an interesting inter-island three-hour course around Carburys hundred isles.
In Class Zero IRC, it was business as usual for Paul O'Higgins' JPK 10.80 Rockabill VI taking the top spot with Royal Irish clubmate Prima Forte (Paul Burke) from Dublin Bay taking the ECHO trophy.
A reversal of yesterday's results in class One saw the Howth-based J99 Snapshot clinching victory from the Parnell family Beneteau 34.7 Black Velvet.
In Class Two, it was a clean sweep for the Bad Company crew from the Royal Cork, winning both divisions.
In Class Three, Patrick Collins Ealu continues to dominate the IRC fleet, with local Schull boat Aphrodite winning ECHO for Edmund Krugel.
Class Four IRC continues to be dominated by Rob Reilly's Bon Journo, with Cove-based Netta J taking the ECHO trophy.
In the White Sail classes, Kieran O'Brien's Magnet from RCYC held off the challenge of fellow club member Prince of Tides to claim the IRC trophy, while the Kinsale-based Y Dream won ECHO.
In White Sail 2, Simon O Keeffe's Lady Min continued Wednesday's success with another victory ahead of Niall Mc Philips' Guapa.
Racing continues on Friday. The full results are below.