Northstar Model 660 Combo Fishfinder/Plotter The finest fishfinder technology with Northstar's renowned navigation technology to create a no-compromise unit with one of the highest screen resolutions in its class. The 7" combination color chartplotter and fishfinder boasts 800x480 screen resolution with 3000 waypoints, 25 routes and 5 track logs. The 660 is gasoline fuel computer and SmartCraft compatible, and is C-Map NT and NT MAX compatible.