Scroll down for Bob Bateman's photo gallery of Day one racing below.
The Cove Sailing Club hosted event is the first on design championships of the season and was sailed over windward-leeward courses on the Eastern Bank of the Harbour.
13 are competing including three Northern Ireland entries and a strong seven boat turnout from Kinsale.
Racing so far has been in light to medium westerly breezes.
Royal North of Ireland's Peter Wallace, on five points, trails Dunne by two points with Dunne's club-mate Ian Travers five points off the lead.
The Championship resumes this morning with a first gun at 10.55
Results are here