Plain English Meaning

It is the legend at the front of the approach chart booklet that tells you what every symbol and number on the charts actually means, including how to read the lowest weather conditions allowed for landing.

Full Definition

A section of the FAA Terminal Procedures Publication that explains the abbreviations, symbols, and conventions used on instrument approach charts, and defines how the published landing minimums (visibility, ceiling, and decision altitudes) are to be interpreted and applied. It serves as the reference key for reading approach plates correctly.

Context Anchor

Seen when reading an instrument approach chart, especially near the used before deciding whether an approach may be continued for landing.