Northstar Model 550 Chartplotter with GPS Northstar's most popular chartplotter includes a built-in 16MB regional background map and the introduction of C-Map's latest cartography: NT MAX. The 550 offers a 5" color screen with 320 x 240 resolution. There is room for 3000 waypoints, 25 routes and 5 track logs. This unit also includes a built in fuel computer and is SmartCraft compatible. C-Map NT+/MAX compatible.