An Alert Area on a sectional chart is identified by:
Why →
Alert areas are depicted with 'A-' prefixed identifiers and magenta hatched borders similar to MOAs. They indicate locations with high concentrations of pilot training activity or other unusual air operations. Flight is not restricted but heightened vigilance is expected.The trap →
Alert and MOA styling can look similar; the prefix distinguishes them (A- versus MOA name).SOURCE → FAA Aeronautical Chart User's GuideCHECKED APR 21ACS II.A.K3EASY