What are the VOR course deviation limits for IFR flight?

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What are the VOR course deviation limits for IFR flight?

VOR course deviation limits set the maximum difference allowed between what your CDI shows and the actual course to the VOR during IFR checks. There are two checks: a ground check and an airborne check. The ground check is done in a fixed position with a stable reference, so it can be more precise, allowing ±4 degrees. The airborne check has to contend with the realities of flight—aircraft motion, changing antenna orientation, and signal variability—so a bit more deviation is acceptable, allowing ±6 degrees. So, the standard limits are ±4 degrees on the ground and ±6 degrees during airborne checks.

VOR course deviation limits set the maximum difference allowed between what your CDI shows and the actual course to the VOR during IFR checks. There are two checks: a ground check and an airborne check. The ground check is done in a fixed position with a stable reference, so it can be more precise, allowing ±4 degrees. The airborne check has to contend with the realities of flight—aircraft motion, changing antenna orientation, and signal variability—so a bit more deviation is acceptable, allowing ±6 degrees. So, the standard limits are ±4 degrees on the ground and ±6 degrees during airborne checks.

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