Bill Gates, 64, is known to regularly take vacations on board superyachts but this is first time he will own one

Aqua yacht is powered with liquid hydrogen stored in two tanks at -423F, meaning its only emission is water

Comes with space for 14 guests, a gym, yoga studio and massage parlour, and cascading pool on rear deck

Artist's impression of the boat along with a 10ft scale model were unveiled at the Monaco Yacht Show in 2019

Gates is known to regularly take vacations onboard superyachts and would usually rent boats during summer trips to the Mediterranean, however this is the first time he has bought one