IFR pilots (or applicants on practical tests with me) will readily tell me the different types of VOR checks available, and many will even be able to find designated points they can use, but fewer apply some of the more practical questions related to VOR tests for IFR navigation.
Let’s assume you remember the types of tests you can do (dual, FAA designated check points of which there are a couple options, and having an avionics shop check the devices being the most common methods) and that you also recall that when you do a check you have to log where it was done, when it was completed, who did the test, and the error that was present (if any) to prove it has been done within the preceding 30-days.
From here, let’s ask a question.
Most pilots do “dual VOR checks” as the most common method of testing. For this test, in the air, an allowable difference of no more than 4-degrees is required to be useable. Ok, most of you are with me so far. But, and here is the question.
What if the error between the two VORs is depicting a 6-degree difference? Continue reading