Marco Sorgassi of the host club leads after three races sailed in the ILCA 6 rig at the Masters' Championships sailing under the burgee of the Royal St. George Yacht Club.
The regatta opened in light easterly winds and bright sunshine on Dublin Bay.
The Italian Master on 12 has a one-point lead over Australian Great Grand Master Robert Jeffreys. In third place is Irish Grand Master Shirley Gilmore with 15 points.
Twenty-seven are competing.
Flannigan from Belfast Lough leads in ILCA 7s
In the ILCA 7 rig, Ballyholme Yacht Club Great Grand Master Gareth Flannigan from Belfast Lough leads overall by four points from Apprentice Conor Byrne of the host club. Queen Mary SC's Rupert Bedell lies third on 14 points.
Twenty-three are competing.
Racing continues on Sunday.