I'm curious what others are using for fuel tank gauges and how accurate they are? My gauges have always been horribly inaccurate. I have 3 fuel sources on my 54' Sportfish. The aft tank is a single tank under the cockpit that measures out just under 700 gals. Then I have Port and Stbd engine room tanks. Each engine room tank is actually three individual tanks connected in series that act as one tank at about 350 gallons. So my total fuel capacity is about 1,400 gallons. The issue is that my gauges all read very low compared to actual fuel level. For example, my aft tank reads empty after using only about 400 gallons. I have verified how much fuel is used by my digital trip fuel monitor as well as what it takes to fill the tank back up at the pump. My engine room tanks are similarly inaccurate and ready very low. All the sending units in the tanks are in the aft portion of the tank as obviously the fuel runs aft when the boat is on plane. When I drop down to idle or slow speed and the fuel levels out the gauges read even lower. But unfortunately they are really far off when I'm on plane or at slow speeds. When I fill the tanks all three gauges read full. I've just lived with this over the years as I'm never really pushing range. However, the engine room tanks are a bit of a PITA to fill as the fuel has to limber fwd in the tanks and unless I fill slowly it won't limber fwd and the fill hoses are in the aft end. So I would like to not have to go to the fuel dock as often. At the same time, running around with all my fuel gauges on empty just causes me stress. So, how can I get a more accurate readings? The sending units I currently have are the basic float style on the end of a rod.