Aviation_Instruments Decca Roller Map Display MK3 Aviation Integrants Software Ferranti Moving Map Display Decca Drift angle and Groundspeed indicator Ferranti Control Inverter Ferranti Static Inverter Leyland Rotary Inverter Smiths Director Horizon H6 Altimeter Encoder Azimuth Gyro KCA 1903 Compass Computer Pilots Indicator Horizontal Situation Indicator Radio Magnetic Indicator Synchro Multiturn Indicator Horizon Gyro Detector Unit Type A Fluxgate frequency doubler Synchro connections to re-orientate Tx/Rx relationship Synchro rotations Illustration form 'Synchro Engineering Handbook' by Upson & Batchelor, 1965