In the April 2023 issue of Seahorse, IRC Technical Committee member Claude Charbonnier explained the inputs for the calculated Hull Factor. The hull factor that appears on our IRC certificates is ...

The BONIFACIO IRC EUROPEAN CHAMPIONSHIP 2025, to take place in Corsica from 4-12 October, is organised by the YACHT CLUB DE BONIFACIO in partnership with the Pole Course of the Yacht Club de France, ...

The BONIFACIO IRC EUROPEAN CHAMPIONSHIP 2025, to take place in Corsica from 4-12 October, is organised by the YACHT CLUB DE BONIFACIO in partnership with the Pole Course of the Yacht Club de France, ...

The 2024 Maples RORC IRC European Championship will be held in Dun Laoghaire (Dublin Bay) from September 12th to 15th, hosted by the Royal Irish Yacht Club. This promises to be the premier event in ...

Seahorse – the official magazine of the Royal Ocean Racing Club – continues to be the world’s foremost sailboat racing magazine. All IRC certificate holders can enjoy an automatic subscription to ...

The following IRC Rule changes were approved by Congress in October 2017: ...

b) IRC Displacement is directly related to Boat Weight. Any addition to Boat Weight will be reflected by a relative increase in IRC Displacement. c) The calculated value of DLR is rounded to the ...

mmoc is defined by ISO 12217-2. It is the anticipated minimum weight that the boat will be when in use.

A boat is ‘on a beat to windward’ when the course she would sail to finish as soon as possible in the absence of all other boats is a close-hauled course or above. For the purposes of rules 18.1(a) ...