Definition
A NOTAM contraction indicating that information previously published has been modified. CHG signals that the current notice replaces or amends earlier content concerning a facility, procedure, frequency, or other aeronautical item.
Plain English
CHG just means something has been altered from what was published before. When you see it in a NOTAM, the item it refers to is not the same as it used to be.
Context Anchor
Seen in NOTAMs, weather briefings, airport information, and other aviation text where space is limited.
Derivation
CHG is a shortened written form of change. Aviation messages often shorten common words to save space and make important updates easier to scan quickly.
Why Pilots Care
A CHG entry tells you the current information differs from what's printed in your charts or handbooks. Missing a CHG can mean flying with outdated frequencies, runway data, or procedures.
Intuition Check
CHG does not mean spare coins or a casual suggestion here. In aviation text, it means specific information has been altered and the new information matters.
Example Sentence 1
The NOTAM showed CHG next to the tower frequency, alerting the pilot that the published value had been updated.
Example Sentence 2
Pilots review CHG entries on the briefing to confirm the latest runway lengths.