If you are running offshore a bit I would not leave without a radar. Once you have one you will wonder why you never put one on before. If you run in the fog it is great, it allows you to run slightly more confident knowing you will not hit any ships or nearby boats. It can also pick up bouys or fish pots that may not be on a map. You can set the radar to alarm when boats or objects get within a set range, this lets you keep your eyes on the water in reduced visibility and alarms you when a potential object in your path is within a certain range of your boat. Once you learn to use it, you can tune it to pick up bird life if the fish you are targeting are surface feeding. Also, when I run offshore I will use it to scope out where boats are heading or fishing. It helps to waste time searching for an area to start. I also run at night a bit and it makes life a bit easier to have a radar. You do not need a high powered unit, but a radar nonetheless is a great thing to have.