Marine Navigation

GPS receiver in marine navigation

Ręczny odbiornik GPS

Around amongst many different ways of locating the yacht at sea, the satellite navigation is being used universally, on account of the availability of GPS receivers of all kinds. Every yacht is equipped with such a device which is showing the position coordinates with the ±10m accuracy today practically, he is summing the travelled road up, he is giving the GMT time. Contemporary receivers are enabling to lead points of the route, they are estimating courses to these points taking amendments to the drifting, the electricity, they are indicating deviating from the course. Alas such a receiver won't know that shoals, stones, shipwrecks, different ships can on course be found. If to start to flow for example from Gdańsk to Stockholm by the shortest route, in harmony with the course suggested by GPS, the voyage would end in the vicinity for Jastarnia somewhere on the beach. And he can therefore one should know different ways of carrying the navigation on and can read a map. Using in sea GPS voyages one should not forget that it is only electronics which is able to disappoint often. There is a fact that the GPS system all in Kosowo was a NATO left while landing of armies turned off for a short while with the curiosity. So it's good to combine the satellite navigation and different navigational methods.

On yachts equipped with the GPS receiver the navigation is being carried on mainly with the help of this device, on account of the accuracy of coordinates, and most importantly the item is available at any time and entire twenty-four hours. GPS is also useful to summing up the travelled road (log), is pointing the exact GMT time out. It is worthwhile in this moment mentioning that, reading of coordinates around GPS-u is an only method of locating the very accurate title and summing the travelled road up. Nobody is wasting time on .. there traditional for the coastal navigation drawing on the map bearings, summing the road up with the help of traditional logs. GPS Carrying the navigation on the basis of recommendations around GPS-u it will be sufficient appropriately often to plot on a map coordinates, writing down the time and the state of the log beside, minimally hourly (log-book), and if need be a little more often. However the good navigational practice is telling that one should duplicate navigational methods. So true the navigator should know it for the navigation as not all methods at least a few. One from more important there is a coastal navigation, needed at least for making sure that we are in this place on the sea which GPS showed us.

Using the GPS receiver one should pay attention whether the map which, we are going to carry the navigation on, on is in accordance for example with the WGS 84 system not, one should move it to GPS to the system in accordance with the map.
It is possible to find more information about the WGS 84 system under this online address: [Only in the Polish Version]

In the coastal navigation locating is coming with the help of permanent and swimming navigational marks, so as: lighthouses, ponds, buoys type LANB. For the coastal navigation we are using: nautical charts, navigational boards, lists of lights and beacons. When we transfer coordinates from the GPS receiver to the map and we can see on her that the yacht is in a range of the light of some lighthouse, it is worthwhile being forever wearing .. to the deck and checking whether she is really there, whether it is just the one rather than different lamp post. We can during the day easily compare a shoreline with the description of wharves contained in descriptions of the given sea basin. To do a few positional lines (through details on lamp posts), setting the observed stance into this way. When however we are in the range of no light of the lamp post, or during the day, when has nothing in view apart from the sea, to compare we can of pointing the sonic depth finder out from the depth read out from the map. The comparison will be more accurate at changeable depths what can with the stance summed up give us the probable position. It is possible to use elements of course for the astronavigation which is often applied in oceanic voyages.

He is reminding me in the end oneself quotation from the book 'Drugi raz dookoła świata' of Krzysztof Baranowski

"(...) I already worked out a long time ago, that to lead GPS to wilderness in spite of the accuracy given to the position, perhaps. And it is a course not so, and it is an incorrect distance. GPS antenna, somewhere or other on the aft rail, is swinging on one and the second page well Atlantic waves aren't indulging and the signal comes once in one position in the second position. Hesitations of the course enumerated this way are dating back to of several dozen steps.
Is it an accuracy? "

Certainly the inaccuracy of the position isn't outweighing from GPS in the middle of the ocean somewhere. Alas in the vicinity of edges, attempts at the port (particularly night) has great meaning.

More about Global Positioning System in the last chapter of the 'Base of astronomy':
Outlining coordinates with the help of the constellation of GPS satellites
[At the moment only in the Polish Version]



The text is in the preliminary translation. I am apologizing for mistakes in the text and I am asking for understanding.





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