What symbol indicates GPS-derived MEA on en-route charts?

What symbol indicates GPS-derived MEA on en-route charts?

• A. A G appears after the altitude
• B. A GPS symbol in parentheses
• C. A G appears before the altitude
• D. No special notation is used for GPS MEA

Answer: (A)

GPS-derived MEA on en-route charts is shown by a G after the altitude. This tells you that the minimum en route altitude for that segment is based on GPS navigation rather than only ground-based navaids, and that GPS coverage is sufficient to meet obstacle clearance requirements along that path. The G after the altitude is the standard way chart designers indicate this distinction. If the altitude appears without a G, it’s the conventional MEA. A GPS symbol in parentheses or a G placed before the altitude would not correctly signal GPS-derived MEA, and no notation would not apply when GPS MEA is in use.

GPS-derived MEA on en-route charts is shown by a G after the altitude. This tells you that the minimum en route altitude for that segment is based on GPS navigation rather than only ground-based navaids, and that GPS coverage is sufficient to meet obstacle clearance requirements along that path. The G after the altitude is the standard way chart designers indicate this distinction. If the altitude appears without a G, it’s the conventional MEA. A GPS symbol in parentheses or a G placed before the altitude would not correctly signal GPS-derived MEA, and no notation would not apply when GPS MEA is in use.