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Radio beacons: Difference between revisions
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===Basic techniques=== | ===Basic techniques=== | ||
====Pitfall==== | |||
Often there are radio stations near each other that transmit on the same frequency. Our equipment will tune into the signal that is strongest. The strongest signal is not always the nearest. Always be sure you know the identity of a station before using it. | |||
====Dead reckoning==== | ====Dead reckoning==== | ||
[http://en.wikipedia.org/wiki/Dead_reckoning Dead reckoning ('''DR''')] is technique you will use every day in many situations. If you know where you are and how fast you move you can predict where you will be after some time. If you have a good compass and know your (ground) speed well you can even do some navigation with this method. Even with the navigational tools that are available today you will rely on this method without knowing it. For long tracks without radio beacons nearby (and no GPS) it is the only way to navigate. | |||
====Position finding==== | ====Position finding==== | ||
We always start from an airport, we know where it is on the map. Going further on the way it is possible to get lost so it is important to figure out where we are if we get lost. Lucky most radio beacons tell their identity, in Morse code or in other ways. That identity gives a good clue where we are on the map but we have to pinpoint our position before we can navigate any further. (images needed) | |||
=====VOR-DME===== | =====VOR-DME===== | ||
We need tune in to just one VOR-DME to pinpoint our position. It gives the radial we are crossing and the distance. From that you use the map, a compass rose and a ruler to pinpoint the position. | |||
=====VOR===== | =====VOR===== | ||
With two VOR stations we receive two radials. On the map we draw the two radials from the station to find our position at the cross point. | |||
=====NDB===== | =====NDB===== | ||
With two NDB stations we have two bearings towards two stations. On the map we draw the bearing lines from the station to find our position at the cross point. | |||
====Go to==== | ====Go to==== | ||
====Go from==== | ====Go from==== | ||