Water speed record (fastest boat)

Water speed record (fastest boat)
Who
Ken Warby
What
511.11 kilometre(s) per hour
Where
Australia (Blowering,)
When
20 November 1977

The official world water speed record is 275.97 knots (511.09 km./h, or 317.58 mph) by Ken Warby in the unlimited-class jet-powered hydroplane Spirit of Australia on Blowering Dam Lake, New South Wales, Australia, on 8 October 1978. However, it is estimated that Warby reached an estimated 300 knots (555 km/h., or 344.86 mph) unofficially at the same location on 20 November 1977.