GPS qpparatus namely, GPS speedometer; Navigation apparatus, namely, GPS speedometer; apparatus for positioning vessels, namely, GPS speedometer; sensors for liquids that detect, measure and sense the quality, level, concentration, pressure and temperature of liquid, namely, liquid sensors for fuel additives for ethanol, diesel exhaust fluid, bio fuel, bio diesel; sensors for liquid fuels that detect, measure and sense the quality, level, concentration, pressure and temperature of gasoline, diesel, kerosene, compressed natural gas, liquefied petroleum gas (LPG), synthetic fuel(non-petroleum fossil fuel), biodiesel, methanol, ethanol, butanol, hydrogen, ammonia; Sensors for liquids that detect, measure and sense the quality, level, concentration, pressure and temperature of liquids; sensors for liquids, namely, for measuring level, temperature, pressure for fuel levels, water levels, black and grey water levels, holding tank levels, diesel exhaust levels, air fuel/ratio levels, boost levels, oil temperature levels, exhaust gas temperature levels; signaling nautical apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling electricity, namely, voltmeters, ammeters, tachometers, speedometers, temperature indicators, and pressure gauges