GPS has been a boon to recreational and commercial boaters. Moving-map displays and navigation overlays are incredibly convenient, easy to use, and dramatically enhance all-weather, all-light-condition safety. The ability to provide precise position information in case of an emergency is another key safety feature. Built-to-purpose, portable chartplotters often come loaded with detailed coastal maps, and many additional maps for the earth's oceans and lakes are available.
Marine portable features include:
- Bright, color, moving-map display
- Navigate to point
- Navigate route
- Navigate saved track
- Man overboard emergency waypoint button
- Speed, distance, course
- Digital compass
- Satellite images
- Auto guidance
- Tide station information
- Fishing charts
- Customized alarms
Portable marine units range in price from $350 to $4,000.