Tartan Marine 10

The Tartan Marine 10 is a 10.1-meter fractional sloop designed by S&S (Sparkman & Stephens) and built by Tartan Marine from 1978 to the present. It features a fin keel with a spade rudder, a 2.8-meter beam, a 1.8-meter draft, and displaces 3039 kg. S&S designs from the International Offshore Rule (IOR) era, like the Tartan Marine 10, prioritized racing handicaps, leading to hulls with short waterlines, wide beams, and significant tumblehome. These design choices, while optimizing for racing rules, could compromise stability in heavy seas, a vulnerability highlighted by the 1979 Fastnet race.14:35 IOR-era boats, such as the 35-foot *Lady K*, require a constant heel to engage their full waterline and achieve maximum speed.8:28 While offering predictable handling and efficient performance when heeled, their narrow lower sections limit storage for long-term cruising.