9 NAUTICAL ELECTRICAL APPARATUSES AND INSTRUMENTS NAMELY, TACHOMETERS, THROTTLE REVERSER FEEDBACK APPARATUS AND GUAGES; CONTROL ACTUATION UNITS FOR OPERATION OF AIRCRAFT AND MARINE VEHICLES, NAMELY, THRUST OR NOZZLE REVERSER FEEDBACK UNITS FOR EMERGENCY CANOPY ACTUATION FOR AIRCRAFT, ENVIRONMENTAL CONTROL UNITS FOR AEROSPACE VEHICLES, FLAP POSITION FEEDBACK UNITS, AIRPLANE EMERGENCY EJECTION UNITS, THROTTLE QUADRANTS FOR AIR NAVIGATION FOR AIRPLANES AND HELICOPTERS, CONTROLS FOR CARGO HANDLING UNITS NAMELY, HOISTS, WINCHES, BOMB RACK ACTUATION UNITS, PRIMARY AND SECONDARY FLIGHT CONTROLS, ROTOR BRAKE CONTROL UNITS, ENGINE NOZZLE FEEDBACK CONTROLS, CONTROLS FOR DRAG CHUTES, WING-FOLD CONTROL UNITS, ELECTRONIC ORDINANCE RELEASE UNITS, CONTROLS FOR MISSILE LAUNCHING UNITS, DRIVE CONTROL FOR NUCLEAR FLUX-MAPPING UNITS, CONTROLS FOR STEERING, TRANSMISSION CONTROLS, BALL BEARING CONTROLS FOR DRIVING AND STEERING MOVABLE LAND, MARINE OR AEROSPACE NAVIGATION, LINEAR AND ROTARY MOTION UNITS, AND PARTS THERE