Sir Ben Ainslie's AC45 catamaran passes the Spinnaker Tower and his team HQ (large building left of the sail) during the first day's competition in the America's Cup World Series in Portsmouth.
His team, Land Rover BAR had a first and second place in the two races today.
The world's oldest sporting trophy has not been contested in British waters until now.
Sir Ben Ainslie's team, Land Rover BAR, hope to wrestle it from the current holders Oracle Team USA in Bermuda 2017.
Picture date: Saturday July 25, 2015.
Photograph by Christopher Ison ©