Abstract: An apparatus (100) for actuating a locking mechanism (12) of a locking sail track car (10) comprises a latch formation (116) disposed in a fixed position with respect to the track (14), a control surface (112) spaced from the latch formation (116) in a hoisting direction, and an actuator assembly (120) for attachment to the car (10). The actuator assembly (120) comprises an actuator (124) for operating a control member (24) of the car locking mechanism, and a latch element (158) connected to the actuator (124) and moveable between a first detent position in which the latch element (158) is not engageable with the latch formation (116) and a second detent position.