Marine Instruments and Components Thereof-Namely, Wind Auto Pilot System for Sailboats Comprising Power/Computer, Binnacle, Control Unit, Indicator Assembly, Wind Direction Indicator Assembly, Auto-Warm Assembly, Close Hauled Apparent Wind Indicator, Wind Speed Indicator, Speed Indicator, Wind Vane/Anemometer Assembly, Junction Box Assembly, Switch/Dimmer Control Assembly, Zero Adjust Indicator, Gyro Compass/True Wind Indicator, and Test Set; Water Angle Indicator Assembly, Water Speed Sensor Assembly, and Water Angle Sensor Assembly, Propellor Position Indicator; and Mechanism in the Nature of a Lock Comprising Disks with Interlocking Pin for Controlling the Shape of a Roller Furling Headsail on a Sailboat When Sail Is Reefed; Aircraft Instruments and Components Thereof-Namely, Angle of Attack Transducer, Angle of Attack Encoder Transducer, Lift Comparator Assembly, Limit Switching Assembly, Lift Input Assembly, Gust and Mixer Inputs Assembly, Wind Shear Indicator, Torque Limiter, Speed Control Indicator Adjustment Unit, Radio Rack Mounting Assembly, Angle of Attack Indicator, Alpha/Mach Computer, Airspeed Select Controller, Speed Command Indexer Controller, Performance Computer Controller, Performance Computer, Indexer Controller Assembly, Altitude Alerter Controller, Altitude Alerter Computer, Wind Shear Annunciator, Wind Shear Computer Assembly, Wind Shear Computer Assembly with Aural Alert; Test Sets for: Speed Command Computer, Speed Command of Attitude and Thrust Computer Module, Speed Command of Attitude and Thrust Calibration Module, Speed Command of Attitude and Thrust Acceleration Module, Servo Amplifier, Flap Transmitter, Pendulous Accelerometer, Signal Summing Unit, Prestall Warning, Characterization Module, Lift Transducer, Continuity Tester, Calibration, Comparator, Associated Ground Equipment for Control Column Shaker, Computer Module, Test Adapter-Speed Command of Attitude and Thrust Connector, Continuity Test Adapter Assembly, Apparatus in the Nature of an Electronic Circuit/Clock Combination for Use in Measuring the Time Constant of a Varying Electrical Signal, Lift Transducer Force Applicator, Pressure Transducer, Card Tester, Lift Transducer Simulator, Lift Transducer Test Weight Set, and Alpha/Mach System Analyzer