VOR Checks need to be made within 30 days of an IFR flight if you intend to use them to navigate. Here are the different ways the checks can be performed per 91.171.
Check out IFR Ground School at [ Ссылка ]
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VOR Checks need to be made within 30 days of an IFR flight if you intend to use them to navigate. Here are the different ways the checks can be performed per 91.171.
Check out IFR Ground School at [ Ссылка ]