You should have a GPS working as stated. Don't go to full power as you will not see debris in the water. Nobody is out there to help you so be self sufficient with safety equipment. Wear a PFD. Never had any luck after sundown, however, fish are on the move. Try after 10:30 pm. The graph comes alive with fish. Fish higher in the water, even out of temp in 60 degree water. Full moon helps. Glow stuff....spoons, and flasher/flies.