Royal Yachting Association unlimited hydroplane rating is a rating applied to hydroplanes competing for the

water speed record The world unlimited water speed record is the officially recognised fastest speed achieved by a water-borne vehicle, irrespective of propulsion method. The current unlimited record is , achieved by Australian Ken Warby in the ''Spirit of Austra ...

, as applied by the RYA. It is usually denoted by a circular white badge on the hull, with an

infinity Infinity is something which is boundless, endless, or larger than any natural number. It is denoted by \infty, called the infinity symbol. From the time of the Ancient Greek mathematics, ancient Greeks, the Infinity (philosophy), philosophic ...

symbol "∞" above the K and number for RYA "unlimited" hydroplane group. The group has included:

References

{{DEFAULTSORT:Lloyd's Unlimited Rating Water speed records