A seat for use in an aircraft having a seat track assembly comprising first and second seat track members and adapted to permit the seat to move along the seat track assembly , the seat track assembly having a plurality of apertures adapted to be engaged by a plurality of moveable locking pins to selectively lock the seat in position along the seat track assembly , the seat comprising: a seat frame having a seat pan portion and a seat back portion ; first and second locking pins carried on the seat frame , the first and second locking pins being moveable into an engaged position in which the first and second locking pins engage the plurality of apertures in the seat track assembly to lock the seat in a predetermined position along the seat track assembly , the first and second locking pins being further moveable to a disengaged position in which the first and second locking pins disengage the plurality of apertures to permit the aircraft seat to be moved along the seat track assembly ; a first actuator arm for moving the first locking pin from the engaged position to the disengaged position; a second actuator arm for moving the second locking pin from the engaged position to the disengaged position, a control link adapted to be moved by a user, the seat being characterized in that the first and second actuator arms are capable of independent movement to move the first and second locking pins independently; and the control link provides a differential input to the first and second actuator arms such that the sum of the displacement of the first and second actuator arms is fixed for a given displacement of the control link , wherein: the control link is operatively attached to the first and second actuator arms by a rotating joint , the rotating joint permits the first and second locking pins to remain in the engaged position as the first and second seat track members move from a parallel to a skewed configuration. a seat frame having a seat pan portion and a seat back portion ; first and second locking pins carried on the seat frame , the first and second locking pins being moveable into an engaged position in which the first and second locking pins engage the plurality of apertures in the seat track assembly to lock the seat in a predetermined position along the seat track assembly , the first and second locking pins being further moveable to a disengaged position in which the first and second locking pins disengage the plurality of apertures to permit the aircraft seat to be moved along the seat track assembly ; a first actuator arm for moving the first locking pin from the engaged position to the disengaged position; a second actuator arm for moving the second locking pin from the engaged position to the disengaged position, a control link adapted to be moved by a user, the seat being characterized in that the first and second actuator arms are capable of independent movement to move the first and second locking pins independently; and the control link provides a differential input to the first and second actuator arms such that the sum of the displacement of the first and second actuator arms is fixed for a given displacement of the control link , wherein: the control link is operatively attached to the first and second actuator arms by a rotating joint , the rotating joint permits the first and second locking pins to remain in the engaged position as the first and second seat track members move from a parallel to a skewed configuration. the control link is operatively attached to the first and second actuator arms by a rotating joint , the rotating joint permits the first and second locking pins to remain in the engaged position as the first and second seat track members move from a parallel to a skewed configuration. <EOS>