9 marine electronics; namely, knot meters, depth sounders, wind direction meters, speed meters, GPS (global positioning system) receivers, VHF radios, auto pilots, marine electronic interface, electronic compasses; electronic charting instruments; namely, digital maps, digital navigational aids, and digital position aids; engine instrument gauges; namely, engine heat gauges, engine cooling system gauges, engine oil pressure gauges, RPM gauges, volt meters, amperage meters, fuel consumption and fuel level gauges and engine fluid level and pressure gauges; and racing instruments; namely, VMG (velocity made good) meters, computerized wind speed, wind direction, and boat speed instruments with computerized analysis contained in one single instrument for use with sail boats