The International 470 remains one of the world’s most technically demanding Olympic sailing classes. At the top level, performance isn’t decided by rig tune or foils alone—it’s decided by how efficiently skipper and crew can move the boat through coordinated kinetics, including body pumping, while keeping the hull in its fastest trim.
Now that the 470 is a mixed event, teams are most often pairing sailors with different body mass, height, reach, and movement profiles. That changes how power is applied and how consistently teams can hit the same rhythm—particularly downwind, where pumping, steering, and trim must stay perfectly synchronised. It also changes the “platform” requirement: the hull and cockpit need to remain stable, balanced, and forgiving across a wider range of crew combinations, so teams can spend less energy correcting heel and trim and more energy converting movement into speed.
That shift is exactly what M10 was developed to address: a 470 hull designed around modern kinetics and mixed-crew dynamics, enabling faster, cleaner, more repeatable body pumping in today’s racing style.
How can the 470 hull change from the existing hull?
The 470 is a measurement controlled class, not a strict one-design like the ILCA. This leads to different shape hulls on the race course, all within the allowed tolerances of the Class rules. Top sailors can feel even small differences in the tolerances which affect how the boat trims, accelerates and even performs on the water.
What’s New in the M10?
1. Hull Shape Optimised for Pumping
The M10 features increased volume in both the bow and stern, providing greater stability and balance to better suit more aggressive downwind and upwind sailing. The midsection retains the proven, efficient lines of Mackay’s previous 470s, ensuring familiar handling and speed.
2. Fairer, Faster Bow
Significant effort went into refining the bow for a fairer, cleaner hull shape, helping the boat slice through waves with less resistance—especially important when the boat is driven hard by crews.
3. All-New Deck and Cockpit
The deck has been redesigned and the cockpit is now wider; with the gunwales higher amidships. Improved foredeck aerodynamics also help reduce drag and enhance speed.
4. Maximum Dimensions for Maximum Performance
Staying true to Mackay’s philosophy, the M10 is built to the absolute maximum waterline length and deck width allowed. On the M10, the maximum deck width extends further aft, enabling the skipper to contribute even more to righting moment—critical when driving the boat with powerful body movements.
More Than a Hull—A Platform for Teamwork
Body pumping in the International 470 is a highly technical and physical skill, involving rapid, rhythmic movements to generate speed by flexing the sail leech. With the 470’s lightweight (120 kg) and highly responsive hull, every movement counts. The M10 has been designed to translate a mixed team's physical effort directly into forward speed, upwind or downwind, enabling them to reach their full potential.
Check out the M10 in action on launch day:
