Great Britain SailGP are the second team to sail their F50 on San Francisco Bay ahead of the second round of the SailGP series which gets underway in less than ten days.
All teams are working out of the SailGP base - the old sea plane base in Alemada which was used by Sweden's Artemis Racing in the 2013 America's Cup regatta.
Earlier the Rome Kirby led US SailGP team, were the first to launch.
After the first Round in Sydney, the Great Britain SailGP put in several hours training and learning on the Artemis Technologies simulator at Heathrow, London.