There is many façades to Boating, more than what can be covered in a paragraph. Boating we have recreational boaters, sailing, in land, ocean, commercial, kayaking, canoeing the list goes on. A basic Marine gps should be able to view water maps, have the ability to record data ( Waypoints - Courses - Tracks and have an electronic compass. ) Multi use is an option one should look at when buying a Marine gps, the more use you get in your gps the better you get at using it the way it was meant to be used. Here is a list of a couple we would suggest: