automatic solar tracking sensors; dosage dispensers for liquids, not for medical use; electronic distance meters; instruments for measuring distances and dimensions; laser distance sensors; navigation control instruments for watercrafts; navigation, guidance, tracking, targeting and map making devices; pool alarms; position sensors; ultrasonic object detectors for use on vehicles; ultrasonic sensors; apparatus for the transmission and communication of data; distance measuring apparatus; infrared detecting apparatus; apparatus and instruments for controlling and monitoring watercrafts; scientific, research, navigation, surveying, photographic, cinematographic, audiovisual, optical, weighing, measuring, signaling, detecting, testing, inspecting, life saving and teaching apparatus and instruments; underwater acoustic detecting apparatus; underwater cameras; view cameras; water activity meters