Global positioning systems (GPS) have become more familiar to consumers in recent years. In addition to being used in cellular phones for safety, GPS systems are also available in automobiles as navigation systems. You can even purchase accessories for your PDA or laptop to use GPS to get directions and find points of interest around you. If you own a boat, a marine GPS unit can be a useful addition to your maritime accessories. It can provide you with detailed information about the course that you are charting, including depth contours, tidal zones, buoys, and other relevant navigational items. In addition, a marine GPS unit can guide you toward popular fishing locations and help you to avoid dangerous areas. Some marine GPS units also enable you to save the route that you have mapped out on removable media cards. You may then be able to transfer the information that you have saved to a computer. You can also find marine GPS units available that transform your laptop computer into a GPS system, which may be advantageous because the monitor will be larger than what you will find on most GPS systems. One of the key features that differentiates marine GPS systems from standard navigational units used in cars is that they are waterproof. The battery and memory card compartments are designed to protect them, and some marine GPS units will float if they are accidentally dropped overboard. With a link to satellites, marine GPS units can provide you with all the help that you are accustomed to receiving from your car's navigational system.
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