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VHF omnidirectional range
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===Intercepting VOR radials=== [[File:VOR Course Deviation Indicator explanation.gif|thumbnail|780px|center|On the course deviation indicator the radial is selected, and together the needle and TO/FR flag show the aircraft's position.]] There are many methods available to determine what heading to fly to intercept a radial from the station or a course to the station. The most common method involves the acronym T-I-T-P-I-T. The acronym stands for Tune β Identify β Twist β Parallel β Intercept β Track. Each of these steps are quite important to ensure the aircraft is headed where it is being directed. First, tune the desired VOR frequency into the navigation radio, second and most important, Identify the correct VOR station by verifying the Morse code heard with the sectional chart. Third, twist the VOR OBS knob to the desired radial (FROM) or course (TO) the station. Fourth, bank the aircraft until the heading indicator indicates the radial or course set in the VOR. The fifth step is to fly towards the needle. If the needle is to the left, turn left by 30β45Β° and vice versa. The last step is once the VOR needle is centred, turn the heading of the aircraft back to the radial or course to track down the radial or course flown. If there is wind, a wind correction angle will be necessary to maintain the VOR needle centred. [[Image:VOR Tracking.GIF|thumb|Aircraft in NW quadrant with VOR indicator shading heading from 360 to 090 degrees]] Another method to intercept a VOR radial exists and more closely aligns itself with the operation of an HSI ([[Horizontal Situation Indicator]]). The first three steps above are the same; tune, identify and twist. At this point, the VOR needle should be displaced to either the left or the right. Looking at the VOR indicator, the numbers on the same side as the needle will always be the headings needed to return the needle back to centre. The aircraft heading should then be turned to align itself with one of those shaded headings. If done properly, this method will {{em|never}} produce reverse sensing.{{Definition needed|date=September 2024}} Using this method will ensure quick understanding of how an HSI works as the HSI visually shows what we are mentally trying to do. In the adjacent diagram, an aircraft is flying a heading of 180Β° while located at a bearing of 315Β° from the VOR. After twisting the OBS knob to 360Β°, the needle deflects to the right. The needle ''shades'' the numbers between 360 and 090. If the aircraft turns to a heading anywhere in this range, the aircraft will intercept the radial. Although the needle deflects to the right, the shortest way of turning to the shaded range is a turn to the left.
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