“A paradigm shift in design and how we sail – this is not a small step or a subtle design trend – this is a revolution”.

Over ten years in its development, involving an intensive program of the most advanced testing and research available, the Dynamic Stability System, designed by Hugh Welbourn, is now set to revolutionise sailing as we know it. Never before has an increase in performance not meant a reduction in comfort.

The patented DSS system utilises retractable foils to reduce heel angles and provide progressive dynamic lift, complementing the traditional fixed or canting keel. This revolutionary system heightens comfort for sailors, reduces displacement, increases performance and even improves upwind increase Velocity Made Good (VMG) in offshore sailing, while providing a significant increase in stability to the yacht.

When the breeze is light or the yacht is manoeuvring, the foil may be centred or retracted within the yacht, without impinging upon the interior, interior, unlike other foil
systems which affect berthing and increase drag when sailing in light winds.

DSS is in use on a variety of other production yachts and one-off designs. DSS foils were retrospectively fitted to multiple Sydney to Hobart winner, Wild Oats,and provide the key design feature behind the entire Quant Boat range (www.quant-boats.com), including 2016 European Boat of the Year, the Quant 23.

DSS foils are currently being fitted to a 142ft superyacht, designed by Farr Design, in build at Baltic Yachts. As the experts in the implementation of these foils, Infiniti Yachts are working closely with the team. The incorporation of DSS to a superyacht such as this, marks a significant turning point in the design of sailing superyachts.


The Infiniti 36 and 46 proved beyond any question the ability of DSS to deliver, and now the options are greater than they ever have been before. Be part of the next generation…


Is it safe?
DSS is inherently fail safe.As the system is contained in a water tight housing a failure does not compromise the integrity of the yacht. As the keel remains fixed, in the event of failure the yacht remains stable to AVS (Angle of vanishing stability) RORC requirements.

Is it legal?
DSS is legal under IRC, ORC and PHRF handicapping systems.

Is it insurable?
Completely and in most instances without premium.

Does it affect the interior living space?
In most cases the DSS system is under the cabin sole.

What happens if the foil breaks?
The yacht remains safe and sails in “normal” sailing mode.

What maintenance is required?
The system is designed to be as maintenance free as possible.

Surely the DSS foil just causes drag?
See “how does it work?” – it does cause drag but also lift and more lift than drag = benefits!

Does the DSS foil make the yacht harder to steer?
No, in fact the opposite. all DSS yachts have proven themselves to be perfectly balanced in all conditions.