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United States Department of Transportation United States Department of Transportation

AC 20-163 - Displaying Geometric Altitude Relative to Mean Sea Level

Document Information

Number
20-163
Title
Displaying Geometric Altitude Relative to Mean Sea Level
Status
Active
Date issued
2009-07-09
Office of Primary Responsibility
AIR-100
Description
a. This advisory circular (AC) shows you how to gain a type certificate (TC), supplemental TC (STC), amended TC (ATC), amended supplemental TC (ASTC), or technical standard order (TSO) authorization for systems incorporating the presentation of geometric altitude relative to mean sea level (MSL) on electronic displays. b. This AC is not mandatory and does not constitute a regulation. In it, we describe an acceptable means, though it is not the only means, to gain approval. If you use the means described, you must follow it in all important respects.
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