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Chapter 2. UNITED STATES OF AMERICA
AERONAUTICAL CONTRACTIONS

Section 1. Decode

EXPLANATION OF CODES

GEN - Indicates general aeronautical usage.

NWS - Indicates National Weather Service and aeronautical weather usage.

ATC - Indicates Air Traffic Control usage.

ICAO - Indicates ICAO usage. International messages should use these.

METAR/TAF - Indicates ICAO weather usage.

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