Plain English Meaning
A short list of important chart changes that happened after the charts were printed. It tells you what is now different from what your chart shows.
Full Definition
A section in the Chart Supplement U.S. that lists major changes affecting aeronautical charts which have occurred since the charts were last published. They alert pilots to corrections, updates, or new information that has not yet appeared on the printed chart itself.
Context Anchor
Seen in the Chart Supplement U.S., especially when checking current information that may affect a flight route, airport, or airspace shown on a chart.
Derivation
A 'bulletin' comes from the Italian 'bulletino,' meaning a short official notice. Here it carries the same idea: a brief, official update issued between full chart printings to keep pilots current.
Why Pilots Care
Using outdated charts can lead to navigation or encounters with new or .