Oceanic Systems Fresh Water Deck Gauge NMEA2000® / PLC - 5250-WOceanic Systems Fresh Water Deck Gauge NMEA2000 PLC 5250 W The Oceanic Systems Deck Gauge provides an accurate and clear display of the tank level right at the point of filling. It is designed to be installed near to the tank filler to help avoid refuelling spills and prevent water pollution incidents. It has a clear blue LED digital display that automatically dims at night to preserve night vision mounted in an attractive stainless steel bezel that