How are GPS MEA's depicted on the chart?

How are GPS MEA's depicted on the chart?

• A. have a 'G' after the altitude
• B. shown in parentheses
• C. shown with bold type
• D. displayed as a shaded area

Answer: (A)

The key idea is that a GPS-based minimum enroute altitude is indicated with a G after the altitude on IFR charts. That little G tells you the published altitude is a GPS MEA—meaning the obstacle clearance is assured when you’re navigating that segment with GPS (RNAV) rather than relying on traditional VOR/DME signals. If GPS isn’t available, you’d need to use altitudes based on other navigation aids, and you may not be guaranteed the same clearance. Other display formats like parentheses, bold type, or shaded areas aren’t used to mark GPS MEAs, so the presence of a G is the specific cue that this MEA depends on GPS navigation.

The key idea is that a GPS-based minimum enroute altitude is indicated with a G after the altitude on IFR charts. That little G tells you the published altitude is a GPS MEA—meaning the obstacle clearance is assured when you’re navigating that segment with GPS (RNAV) rather than relying on traditional VOR/DME signals. If GPS isn’t available, you’d need to use altitudes based on other navigation aids, and you may not be guaranteed the same clearance.

Other display formats like parentheses, bold type, or shaded areas aren’t used to mark GPS MEAs, so the presence of a G is the specific cue that this MEA depends on GPS navigation.