You can program the settings on a Smartcraft system for one tank. This could be the under seat belly tank.There is also a sight window in front of the fuel tank under the drivers seat. This is not always easy to see a fuel level through, though it does work. It will be able to be seen for a couple of years, until the fuel tanks age and get a rust colored coating inside of them which seems to be present in newer fuels.The rear kicker tanks are easily seen through the rear hatch. BCB