Explorer 660: The vertical format of the Explorer 660 optimizes the boater’s forward visibility when navigating, and in sounder mode, takes advantage of the 800 vertical pixels for unbelievable clarity through the water column.Low Profile, High Functionality...Northstar M84:Track-Your-BuddyWhen connected with the Explorer 721 VHF, you can automatically plot the position of your DSC radio-equipped boating buddies.Fish like the Pros…High vertical pixel count plus 100X zoom functions mean you can see bottom structure detail like never before. Fish inshore or offshore with the dual frequency sounder and 600 Watts of output power.Fuel ManagmentExplorer Chartplotter/Fishfinder Combos are the perfect devices for managing important fuel consumption and economy information. Built-in software allows you to plot and calculate fuel economy curves easily, helping you get the best performance year after year.C‑Map for AllAll units run C‑Map NT MAX™ cartography, with enhanced port details, tidal overlays, location photos and comprehensive chart info.