Make a direct to VOR navigation aid[PDF]

Map

This is a chart showing:

  1. The aircraft coloured in orange
  2. VHF Omnidirectional Range - VOR : TRENT TNT 115.7MHz
  3. NDB : WHI 368kHz
  4. Airfields: EGOE Ternhill ; EGBD Derby ; EGCT Tilstock
VOR location.png


The purpose of the example is to go direct to the TNT VOR from the present position

VOR Receiver

In order to properly fly to this VOR, please refer to the following page: VOR receiver

Flying inbound a VOR

Establish the reception of the VOR

The first step for the pilot is to tune the instruments:
  1. Tune the VOR frequency on the NAV frequency selector of your choice
  2. Verify that the VOR instrument is updated (arrow moved from standby position to the beacon)
After tuning the VOR frequency, the red flag must disappear

Tuning a VOR receiver.png

The VOR can sometimes be received at great distances. It is very important to verify the Morse-code identifier of the station to be certain you are navigating from the right beacon

Tune the course on navigation instrument

There are different ways to make a direct to a VOR but, we will give you one of the simplest methods.

The simplest method is to search with the navigation instrument which radial you are currently on.
  1. Turn the OBS selector (figure 1)
  2. Turn until you will have the white triangle pointed to the TO mark and Turn until the vertical needle is centered:
  • BAD: needle centred but indicator shows FROM (figure 2)
  • BAD: TO indicator is showing but needle not centred (figure 3)
  • GOOD: TO indicator and needle centred (figure 4)

Finding the right course to the VOR receiver.png

Turn to the VOR

When your instrument is tuned, just take the course indication of your instrument and, turn your aircraft toward this course: Heading = Course.

Find the right course to the VOR.png

In our example, Course is 80, aircraft turn to 080° heading.

After this turn, the needle, like our example above, can move a little to the right or to the left.
You can make some little adjustment:

  1. Centre the NAV needle using OBS navigation button again
  2. Set heading to the new course indication on your instrument

One minute after this manoeuvre, we can see the progress of the aircraft on the map:
Map as we turned inbound the VOR.png

Mind the wind effect

The VOR navigation using CDI and course selector is precise. If there is a crosswind component, the aircraft may leave the radial (aircraft is ‘pushed’ by the wind off the selected radial).

Wind effect when the drift is not corrected.png

In order to keep the same radial, just perform small adjustments using your heading only!
  1. Turn in direction of the needle (in our example to the right) in order to centre the needle.
  2. When the needle is centred, adjust your heading again to the selected navigation course.

Of course, you can compensate for the wind effect by selecting a new heading.

Heading taking the drift into account to the VOR.png

After aircraft manoeuvre and having added some degrees in the heading to compensate wind.

Here is the result after the wind effect and heading adjustment to catch the right course:
Map after drift calculations - VOR tutorial.png

Overhead the VOR

When approaching the VOR, the needle will move to one direction quickly. If you don’t want to change direction, then do not touch heading and navigation instrument.

Your aircraft is in the ‘silent cone’. When an aircraft is overhead a VOR, the information given by the beacon is not correct. You must wait a little in order to retrieve proper VOR reception. Overflying a VOR.png

After crossing the VOR, check that the white triangle moved to the FROM (FR) indicator

From-To indicator after overhead of VOR.png

Go forward from the beacon

If you maintain the heading, you continue your route outbound the VOR station. To maintain outbound:
  1. Maintain the needle of the VOR navigation instrument centred, and the indicator to FROM position
  2. Use the same course heading

VOR receiver when VOR is straight behind.png
Map VOR tutorial when VOR is overflown.png


See also

  • None

Reference

  • None

Author

  • VID 150259 - Creation
  • VID 200696 - Wiki integration

DATE OF SUBMISSION

  • 02:26, 14 May 2021

COPYRIGHT

  • This documentation is copyrighted as part of the intellectual property of the International Virtual Aviation Organisation.

DISCLAIMER

  • The content of this documentation is intended for aviation simulation only and must not be used for real aviation operations.