Rating headsail numbers – Seahorse April 2024
Sails are a boat’s driving force and a key area of development, so it’s no surprise how often an IRC rule change involves the rating of sails or associated rigging. A key change for 2024 was to start rating the number of headsails carried on board. T…
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40 years of development – Seahorse June 2024
As an 18-year-old in January 1985, Jenny Howells’ first full-time job was as office junior at the RORC Rating Office; little did she know that she would get deeply involved in a nascent yacht rating rule that, over the next 40 years, would become a w…
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IRC Hull Factor – Seahorse April 2023
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 sometimes viewed with caution by owners and designers…
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