Start with the fundamentals
The Knowledge Base explains aviation terms, systems and concepts. USAviation.info Resources remains the maintained directory for current official tools, offices, operators, contacts and datasets. The two sections intentionally do not duplicate each other.
Airspace & Air Traffic Control
A plain-language guide to U.S. airspace classes, ATC facilities and basic pilot/ATC responsibilities.
Read guide →REFERENCEAircraft Identification & Type Designators
How aircraft manufacturer/model names differ from FAA/ICAO aircraft type designators used in air traffic systems.
Read guide →REFERENCEAvionics & Navigation Basics
A practical introduction to GPS/GNSS, WAAS, VOR/DME, ILS, RNAV, RNP and performance-based navigation.
Read guide →REFERENCEAviation Weather Products
What METARs, TAFs, PIREPs, SIGMETs and G-AIRMETs are and how they fit into aviation weather awareness.
Read guide →REFERENCEFAA Regulations & Certification — Parts 61, 91, 121, 135, 141 & 142
A plain-language map of commonly referenced FAA regulation parts covering pilots, operations, air carriers, charter, pilot schools and training centers.
Read guide →REFERENCEAviation Glossary A–Z
Search plain-language definitions for common aviation terms across operations, airspace, weather, navigation and certification.
Open glossary →REFERENCEAcronyms & Abbreviations
Search common aviation abbreviations and acronyms, their meanings, categories and practical context.
Open acronyms →