A equipment support for aircraft and the like comprises a base to which a lower link, an intermediate link, and a equipment platform are attached. The lower link rotates horizontally about the base. The intermediate link rotates horizontally about the end of the lower link and the equipment platform rotates horizontally about the end of the intermediate link. This arrangement gives the equipment platform the ability to assume an infinite number of lateral positions and 360 degrees of rotation. The equipment support is locked in position by means of locking pins that engage corresponding metering plates adjacent the support bearings. The locking pins are released by a common linkage that sequentially releases the equipment platform rotation lock then simultaneously releases the rotation locks of the intermediate and lower links.