Simviation Forum - A VOR positioning question

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A VOR positioning question (Read 2915 times)

Reply #15 - Apr 13^th, 2008 at 6:51pm

Brett_Henderson Offline
Colonel
EVERY OUTER MARKER SHOULD
BE AN NDB

Gender:
Posts: 3593

And it just goes to show ya... Leave those GPSs off Cool

.. or at the very least, use a VOR when racking radials..use the GPS as a DME and to keep your butt out of controlled or restricted airspace... Cheesy

Seriously though... here's the kicker. The VOR reciever and gauge can be off, too. I think +/- 4 degrees is considered, useable. (or is that 4 degrees difference between to VOR gauges, tuned to the same VOR constitutes a VOR check ?)

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Reply #16 - Apr 13^th, 2008 at 7:42pm

Splinter562 Offline
Colonel
Tampa, FL

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Posts: 217

[Those squemish about FARs should turn away now]

VOR checks are based on indicated bearing to the station. Which for a CDI means centering the needle and reading the bearing.

For a "dual systems VOR (units independent of each other except for the antenna)", the maximum permissible variation is ±4°. For a single VOR you need to use an airborne or ground VOR check point (listed in your handy A/FD). For ground checkpoints the max error is ±4°. For airborne checkpoints the max error is ±6°.

To legally use the receiver for IFR it has to be checked using one of the methods above (or a VOR Test signal) within the preceeding 30 days.

References:
AIM 1-1-4
FAR §91.171

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Reply #17 - Apr 13^th, 2008 at 8:22pm

Brett_Henderson Offline
Colonel
EVERY OUTER MARKER SHOULD
BE AN NDB

Gender:
Posts: 3593

LOL

Don't bother feeling squeemish about FARs.. it's a waste of energy.

I remember one session at the club... Me, a CFI, a DE, a 20,000hr pilot, and an aviation attorney. We found more than one FAR section where a consensus on what it said could not be reached, or if it was even logical.. Shocked

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