How is altitude expressed in a NOTAM?

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Multiple Choice

How is altitude expressed in a NOTAM?

Altitude in NOTAMs is given in feet relative to mean sea level or as a flight level (FL) based on standard pressure. This means you’ll see values like 10,000 feet MSL or FL180. The reference is MSL, not above-ground height, and the units are feet (or FL), not inches or kilometers. AGL or local datum references aren’t used for NOTAM altitude, which is why the correct approach is expressing altitude as feet or FL relative to MSL.

Altitude in NOTAMs is given in feet relative to mean sea level or as a flight level (FL) based on standard pressure. This means you’ll see values like 10,000 feet MSL or FL180. The reference is MSL, not above-ground height, and the units are feet (or FL), not inches or kilometers. AGL or local datum references aren’t used for NOTAM altitude, which is why the correct approach is expressing altitude as feet or FL relative to MSL.

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