9 [ SCIENTIFIC, NAUTICAL, GEODETIC, ELECTRICAL, ELECTRONIC, PHOTOGRAPHIC, CINEMATOGRAPHIC, OPTICAL, WEIGHING, MEASURING, SIGNALING, CONTROL RESCUE, EMERGENCY AND TEACHING INSTRUMENTS, WITH PARTICULAR REFERENCE TO NAUTICAL, MARINE, SWIMMING AND UNDERWATER DIVING, NAMELY DEPTH AND PRESSURE GAUGES, DIRECTIONAL COMPASSES, DIVE TIMERS, ELAPSE TIME INDICATORS, TANK AND REGULATOR PRESSURE GAUGES, BREATHING RATE INDICATORS, UNDERWATER DIVING CHRONOMETERS, MAGNETOMETERS, UNDERWATER STILL, MOTION PICTURE, DIGITAL AND VIDEO CAMERAS, SOUND RECORDERS, UNDERWATER BEACON LIGHTS AND EMERGENCY LIGHTS, STROBES, UNDERWATER LANTERNS AND TORCHES, WEIGHING SCALES, MEASURING STICKS AND TAPES, TWO-WAY UNDERWATER, TRANSMITTERS AND RECEIVERS, MICROPHONES AND EARPHONES, AIR TANKS, OXYGEN TANKS, AIR AND OXYGEN REGULATORS AND AIR AND OXYGEN TANK MOUTH PIECES ]