It’s also the way our two eyes work with our brain to judge the distance of an object, and how our two ears work with our brain to discern the direction of a sound. Long before people were taking measurements, many terrestrial, aquatic, and airborne animals "made their living" using navigation by triangulation via their senses. The method of dual range, or dual bearing, measurement for locating a third point (the point of interest) is known as triangulation and it is an age-old surveying technique. Once a transit is properly setup and aligned, its scaled-markings can be used to accurately determine distance and direction, or range and bearing, to a sighted target by making transit measurements from two perspectives of known distance apart. These tripoded instruments can be positioned and aimed very precisely and repeatably at a distant target. Land surveyors have long-since used mechanical/optical instruments called transits, which are essentially sight-glasses or telescopes with built-in angle-measuring markings.
An accurate survey is performed, for example, by the buyer of plot of land, to minimize disputes with neighbors about who owns the land near the lot lines, upon whose land the fence is built, exactly how big the lot is, and such. On land, there are established benchmarks (well-defined points of known location) dotting the landscape all over the world, so surveyors can always “tie-in,” or reconcile, to one or more of these benchmarks in order to ensure the measurement accuracy of their point of interest. How do you locate, or find your way back to, a particular point of interest over a mile below the sea surface on the bottom of the ocean? For that matter, how do you even know where you are at sea when you can’t see the land? Click image for larger view and image credit. Navigation almanacs used on the NOAA ship Ronald H. Click image for larger view and image credit.įigure 2. This 2007 2008 2009 2010 Ford Expedition EL/Max(U354) car stereo is worth your upgrading with a very reasonable price.Figure 1. Besides, optional functions like digital TV, DVR, OBDⅡ, DAB, 3g module and rearview camera can all be added to this stereo to meet your different needs.
2007 EXPEDITION NAVIGATION SYSTEM ANDROID
This 2007 2008 2009 2010 Ford Expedition EL/Max(U354) car stereo is loaded with the intelligent pure Android 5.1.1 operation system and a high-quality RK3188 1.6 GHz Cortex A9 Quad-core processor, which can greatly facilitate the operation and improve the performance.Ī wide of practical and entertainment features are supported by this unit, which include high-precision 3D GPS navigation system, Bluetooth hands-free phone calling, Bluetooth streaming music, DVD player, FM/AM radio, USB and SD card connection, etc. Here I would like to share a link of a 2007 2008 2009 2010 Ford Expedition EL/Max(U354) car stereo from Seicane where you can find an ideal replacement for your factory radio as well as useful help for all your problems. Or if you meet any difficulties in the process of the installation, you can consult your dealer or a professional.
2007 EXPEDITION NAVIGATION SYSTEM INSTALL
If you have any doubts about the steps or find it too hard to install on your own, you can ask a mechanic for help. Wish you learn some skills from the above installation steps. Step 13: Install all screws, trims, panels, bolts and the radio bezel and AC controls into their original place. Step 12: Turn on the new Seicane stereo and check whether the radio is working properly. Step 11: Connect the Seicane stereo to your original car radio’s plugs, and put the new Seicane stereo into the dash. Connect the harnesses to the back of the new Seicane stereo
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