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Radio beacons: Difference between revisions
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[[File:Position ndb vor vor dme.jpg|frame|Position finding with NDB, VOR and VOR-DME]] | [[File:Position ndb vor vor dme.jpg|frame|Position finding with NDB, VOR and VOR-DME]] | ||
Standing blindfolded in the middle of a field. In a distance a friend is shouting "I am here!". You turn around till you hear | Standing blindfolded in the middle of a field. In a distance a friend is shouting "I am here!". You turn around till you hear your friend best and start walking towards the sound. When there are two friends (with distinctive voices) and a map telling you where they stand, you can even figure out about where you are on that map. This describes how a Non Directional Beacon ([[NDB]]) works. | ||
If the friends do not like to shout all the time they can lay down numbered ropes around them. Each rope leads directly towards a friend. The numbers on the rope are the same numbers as the degrees on a compass. So by comparing the numbers on the ropes that cross the place where you are standing you know where you are. This describes how a VHF Omnidirectional Range ([[VOR]]) works. | If the friends do not like to shout all the time, they can lay down numbered ropes around them. Each rope leads directly towards a friend. The numbers on the rope are the same numbers as the degrees on a compass. So by comparing the numbers on the ropes that cross the place where you are standing, you know where you are. This describes how a VHF Omnidirectional Range ([[VOR]]) works. | ||
But what if you want to know where you are and you have just one friend? Then the friend had to make knots in the ropes telling how far away you are. This describes how a VOR-Distance Measuring Equipment ([[VOR-DME]]) works. | But what if you want to know where you are and you have just one friend? Then the friend had to make knots in the ropes telling how far away you are. This describes how a VOR-Distance Measuring Equipment ([[VOR-DME]]) works. | ||
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A [http://en.wikipedia.org/wiki/Radio radio] is a generic term for the transmission of electromagnetic waves. In the above comparisons, a radio beacon is the one that is shouting or that is laying out the ropes. A beacon can include information, it can even send out music. Two-way communication is possible where the equipment on-board questions equipment on-ground or the beacon is used for ATIS or Tower communication. | A [http://en.wikipedia.org/wiki/Radio radio] is a generic term for the transmission of electromagnetic waves. In the above comparisons, a radio beacon is the one that is shouting or that is laying out the ropes. A beacon can include information, it can even send out music. Two-way communication is possible where the equipment on-board questions equipment on-ground or the beacon is used for ATIS or Tower communication. | ||
Radio beacons enable [[Radio navigation]] and [[IFR]] taking away the need for visual landmarks. Navigation at night and at high altitude | Radio beacons enable [[Radio navigation]] and [[IFR]] taking away the need for visual landmarks. Navigation at night and at high altitude are possible. | ||
==NDB== | ==NDB== | ||