Master compass:dia. 16" (41.9cm) This consists of a gyro wheel, enclosed in a case suported on knife edges within a vertical ring. A Control and Damping system is mounted on the gyro case together with a pririt level. an aluminium dial marked in degrees (0-360) is fixed on top of the vertical ring, quadrantal balance wrights being fixed to the bottom of the ring. A lubber line ring is mounted on the main pendulum frame and beneath it is an AirVane Folloe-up Ring is located at the side of the main frame. A motor driven oil pump is at the bottom of the main frame. The gimbal rings on which the Master Compass is suspended in its binnacle are fitted with oil dashpots for damping the movement of the pendulous frame. Spring shock-absorbers are also fitted. The binnacle is all metal, fitted with an aluminium cover and ventilated by means of gauze coverd ports.
Switchboard:14 x 5.5 x 23.5" (35.5 x 14 x 59.7cm) Type A. This unit includes a variable resistance for voltage control; DC meter, DC ammeter, battery cut-out, switches, fuses and repeater transmission controller.
Motor Generator Unit: 10" (25.4cm) length, dia. 7" (17.8cm) Permanent magnet inductor type, driven by 50 volts DC current at 2,000 RPM and supplying a 70 volt 3-phase alternating current.
Anti-shocking Mounting-Steel bulkhead mounting bracket with sprung hinged arms.