Easy to navigate with GPS or without! It's easy for boaters of all skill levels (from beginners up)to use in their boats at any time during daylight hours from anywhere that has cell service - even if you are not near shore/ocean access points like marinas etc., it is still very helpful when out past dusk / dawn times where there may be no buoys available nearby but they can get help by using this App while underway so long after dark until sunrise again later same day! This helps keep everyone safe & happy onboard together enjoying an evening ride away!!