Glossary
What is CTAF?
The radio frequency pilots use to announce their positions and intentions to one another at an airport with no operating control tower. Nobody is controlling traffic on it, so the calls are advisory and separation remains the pilots' own responsibility.
Also called Common traffic advisory frequency
That is the whole entry for now. The longer version, with the mechanics and worked examples, is still to be written. See autorotation for how those read once they exist.