What is the role of a wing trimmer in SailGP racing?

Wing Trimmers need to put the wing in the right shape to control its power and be able to gain speed. They need to communicate constantly with the driver to understand what the course is and how to place the wings in order to get there as soon as possible.

From its cockpit, they can also access buttons for trimming the foils. Moreover, he regulates the inclination of the foil downwind at the time the driver crosses to the other side.