Plain English Meaning

A test the pilot does to make sure the aircraft's VOR navigation radio is showing the correct bearing before flying on instruments. It must be done within the last 30 days, and the result must be written down.

Full Definition

A required accuracy check of an aircraft's VOR (Very High Frequency Omnidirectional Range) navigation receiver, performed and logged within the preceding 30 days before any flight under instrument flight rules that uses VOR for navigation. The check confirms the receiver's bearing indication is within allowable tolerance, using one of the FAA-approved methods: a VOT (VOR test facility), a designated ground or , a dual-VOR , or a check a known landmark on a published . Tolerances vary by method (commonly ±4° for ground checks and ±6° for airborne checks). The pilot must record the date, place, , and signature in the or other reliable record.