I leave the lagoon in the middle of the night to get to the fishing grounds for first light, and we like to use something to see the channel markers in the bay. This lights them right up from pretty far away. It's got a lot of different beam widths but we use the tightest, which easily lights up the reflector on a marker buoy from about 100 yards. Once in the ocean we simply rely on radar, but this light is impressive.