Jack McDowell and Henry Thompson of Malahide Yacht Club had seven wins from 11 races in the 420 division of the Youth Sailing Nationals at Ballyholme on Belfast Lough on Sunday.
The strong score tally gave them an 18-point cushion over second-place rivals Max Sweetman and Robert Jephson of Wexford and Waterford Harbour Sailing Clubs on 32 points.
In third place in the 11-boat fleet were Imogen Hauer and Hugo Micka, also from Malahide Yacht Club, who finished on 39 points.