Rotation lock mechanism for aircraft seat

A braking mechanism to control rotational movement of a seat is disclosed. The braking mechanism may comprise a circular member (10) (e.g., a disc or ring) that is coupled to a base assembly (24) and a caliper (18), coupled to a seat assembly, to engage the circular member (10). In a biased position, a braking element (40) of the caliper (18) applies a braking force to the circular member (10). A user can reduce the braking force by increasing the tension on a cable coupled to the caliper (18). Once the braking force is sufficiently reduced, the user may rotate the seat until the desired rotational orientation is attained. Upon release of the cable, the braking mechanism re-engages to prevent further rotational movement.