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AC 90-108: RNAV Substitution Rules Every IFR Pilot Must Know
The CTS Team
July 30, 2026
In-Flight Safety » AC 90-108: RNAV Substitution Rules Every IFR Pilot Must Know AC 90-108 Explained: Using RNAV in Place of Ground-Based Navaids Can your GPS legally replace that VOR on your next instrument approach? The answer depends on more variables than most pilots realize. FAA Advisory Circular AC 90-108—active
AC 90-108: RNAV Substitution Rules Every IFR Pilot Must Know
The CTS Team
July 30, 2026
In-Flight Safety » AC 90-108: RNAV Substitution Rules Every IFR Pilot Must Know AC 90-108 Explained: Using RNAV in Place of Ground-Based Navaids Can your GPS legally replace that VOR on your next instrument approach? The answer depends on more variables than most pilots realize. FAA Advisory Circular AC 90-108—active
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