A ramp was fitted to the Sunseeker out of sight and the jet boat jumped it, performing the barrel roll in mid-air before landing and delivering a glancing blow to the dockside (edited out in the film).
Six cameras captured it in a single take. The chase climaxed at the Millennium Dome, still under construction in 1999.
Having torpedoed the Superhawk, causing it to be rammed into the shore so that the assassin could escape in a hot air balloon, the last jet boat stunt was to jump the burning Sunseeker, clear a low wall and land in a small lake, Bond – played by Pierce Brosnan – having decamped mid-flight onto the balloon.
The stunt team had a five-minute window of slack water to make the jump, allowing just one attempt per day. Six attempts later it was in the bag, co*pleting six weeks of filming for six screen minutes of spectacular boating stunts.
Source: World's coolest boats: Why the Q Boat from The World Is Not Enough is 007's ultimate pocket rocket (http://ht**://www.mby.c**/specials/worlds-coolest-boats-q-boat-world-is-not-enough-james-bond-129754)