The event saw over 230 sailors, representing 31 countries, descend on Dublin Bay for seven days of racing.
The 4.7 Laser class is for sailors between the age of 14 and 17 with many of the international competitors in Ireland this week ultimately vying to represent their country as Olympians.
The event, in planning for several years, was only made possible at the last minute with changes in government guidelines on international travel.
Two Dun Laoghaire-based sailing clubs, the Royal St George Yacht Club and the National Yacht Club co-hosted the event, which was supported by Dun Laoghaire Rathdown County Council.
The ultimate winner in the female fleet was Emma Mattivi of Italy, followed by Croatian Petra Marednic and another Italian Gaia Bolzonella in second and third respectively.
In the male fleet, Martins Atilia of Latvia took home gold. Greek sailor Alexandros Eleftheriadistook silver with Massimiliano Antoniazzi of Italy taking bronze.
Best of the Irish girls were Tralee's Eimer McMorrow in 38th and Dún Laoghaire's Anna O'Connor in 40th. The Irish boys were led by Rocco Wright of Howth in 49th and Dún Laoghaire's Archie Daly in 61st place, while Luke Turvey was the third Irish sailor in the boys Gold Fleet coming 63rd.