NAVIGATION DEVICES

A movable object includes a plurality of actuation devices configured to move the movable object, a processor configured to control the actuation devices and the movements of the movable object, and at least one sensor. The sensor has a coordinate system not substantially in alignment with a coordinate system of the movable object. The sensor senses the state of the movable object and the processor controls the propulsion devices and the movements of the movable object based on the sensed state.