HMS Queen Elizabeth is the biggest ship in the history of the Royal Navy.
 
Weighing in at 65,000 tonnes, her vast flight deck, when finished, will provide four acres of British sovereign territory which can be deployed anywhere on the planet.
 
But how does the aircraft carrier compare to the American Nimitz class - the biggest and for decades, the best?
 
Forces TV's Will Inglis has been aboard to find out.