... 2) Built-in large memory electronic chart3) High accuracy marine GPS receiver4) Versatile display mode include - Plotter screen - Echo ... 15, 20, 30, 40, 50, 80, 100, 150, 200, 300, 500, 1000FM: 2.5, 5, 10, 15, 20, 30, ... , 15, 20, 30, 40, 50, 80, 100, 150, 200, 300, 500, 1000FT: 5, 10, 20, 30, 40, 60, 80, ... 100, 150, 200, 300, 500, 1000, 2000, 3000 6. Phasing (shift)1 unit steps ...