20-163 - Displaying Geometric Altitude Relative to Mean Sea Level
- Date Issued
- July 09, 2009
- Responsible Office
- 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.
- AC20-163.pdf (PDF, 30 KB)