FAA Pilot/Controller Glossary
Issued by Federal Aviation Administration, this dictionary know as the P/CG (Pilot/Controller Glossary) is an excellent compilation of acronyms, abbreviations and phrases used in the communication between pilot and controller. This version of the P/CG became effective 2/14/08 and is an addendum to:
Aeronautical Information Manual
Order 7110.10, Flight Services
Order 7110.65, Air Traffic Control.
GLIDESLOPE INTERCEPT ALTITUDE
GLOBAL POSITIONING SYSTEM (GPS)
GRAPHIC PLAN DISPLAY (GPD)