Apparatus and instruments for use in navigation, surveying, inspection, and life-saving applications, namely, underwater sonars, sensors for determining position, positioning lights being luminous beacons, cameras; apparatus and instruments for conducting, switching, transforming, accumulating, regulating and controlling the distribution or use of electricity; diving suits, divers' masks, ear plugs for divers, nose clips for divers and swimmers, gloves for divers, breathing apparatus for unde...