A Global Positioning principles (Gps) has come to be one of the de facto "must have" electronic marine devices for every boat on the water. A marine Gps expedient provides two functions in singular that, once you get used to, you will wonder how you ever managed without.
First, it provides you needful facts about where you are and how fast you are traveling. Most marine Gps units will tell you where you are within two to three meters of accuracy, how fast you are traveling and how far you are from shore.
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Second, most marine global positioning units allow you to set waypoints. A waypoint is a label for where you are currently. This highlight allows you to plot a navigation route through craggy rocks or difficult waters, avoiding buoys, nets and other obstacles. Many waypoints form a route that you can save and use as a guide for the inbound journey or re-use another time for safer and easier navigation to a favorite location. another great advantage of setting waypoints is that you can mark needful finds whether this is an abundant fishing spot, a great scuba diving location or the position of a wreck.
By overlaying Gps waypoints with an integrated mapping tool or chart plotter, a marine Gps can give you a very definite picture of where you have been, where you are, where you want to go and what lies in your path.
Ultra-precise Gps marine electronics comprise the addition of signals from the Wide Area Augmentation principles (Waas). Waas is program that was industrialized the Federal Aviation administration to definite any errors. Satellites trip on an elliptical path in orbit colse to the earth. The calculations used to decide where you are depend also on knowing exactly where the Gps satellites are. The orbital path of a satellite is disrupted by a score of natural phenomena, including space weather, the gravitational pull from the Earth and other factors. Waas performs corrections for these factors, addition the accuracy of the Gps signals that your Gps receiver processes.
If your marine Gps is Waas enabled (and most are these days) then you will advantage from this improved accuracy without doing a thing. You don't have to configure it or subscribe to it. However, it is only ready in North America; so if you are navigation outside the Us waters just know that the accuracy of your Gps may dip from great than three to less than seven meters and perhaps to less than fifteen meters. Waas is a good highlight to look for when shopping for discount marine Gps.
Waas enabled marine Gps can be mounted (fixed position) or movable (hand-held) systems. Hand-helds are beneficial if you leave the boat to visit a local hotspot on dry land, observe an island or plainly find where you left your boat in a large and unfamiliar marina. If you do intend to use your movable Gps on dry land, then it is definitely worth paying more for one that comes with built-in maps because following a compass point that is plotted as a level line is not easy on land, especially in urban areas or over large terrain.
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