Jetlev, ambitiously described by the company as applicable to firefighting, search and rescue, marine structure inspection and repair, and peacekeeping, is certainly an unusual device. The propulsion engine, fuel and related systems are housed in a separate trailing vessel about the size of 
a waverunner hull and tethered to the jetpack. Water is the jet propulsion medium that allows riders to reach heights up to 28 feet and maximum speed above water at 35 kph, according to the manufacturer. Jetlev has a price tag of $175,000.
Specifications:
Flight ceiling (measured at feet level): 28 feet (8.5 meters)
Duration at wide-open throttle (approx.) 1 hour
Duration at cruising speed (approx.) 1.5-2 hours
Follow this link for a selection of Superyachts and Luxury Charter Yachts that carry the best in water toys on board.