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.[1]
The group has included:
| Boat | Driver | ||
|---|---|---|---|
| K1 | | Miss England III | Henry Segrave Kaye Don |
| K2 | | Miss Britain III | 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 |
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