Lloyd's unlimited rating

Royal Yachting Association unlimited hydroplane rating is a rating applied to hydroplanes competing for the water speed record, as applied by the RYA. It is usually denoted by a circular white badge on the hull, with an infinity symbol "" above the K and number for RYA "unlimited" hydroplane group.

The group has included:

Boat Driver
K1 Miss England III Henry Segrave
Kaye Don
K2 Miss Britain III Hubert Scott-Paine
Hubert Scott-Paine
K3 Blue Bird K3 Malcolm Campbell
K4 Blue Bird K4
renamed Bluebird K4
Malcolm Campbell
Donald Campbell
K5 White Hawk Frank Hanning-Lee
K6 Crusader John Cobb
K7 Bluebird K7 Donald Campbell
K8 British Pursuit Tony Fahey