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⚖ Airspace · FAA Aeronautical Chart User's Guide, FAA Remote Pilot Study GuideQ-047 · 47 of 251

On a sectional chart, a solid blue line typically indicates the boundary of:

Why →
Class B airspace is depicted on sectional charts with solid blue lines. Class C uses solid magenta lines, and Class D uses dashed blue lines.
The trap →
Blue lines appear for both Class B (solid) and Class D (dashed). The color AND line style both matter. Solid blue = Class B.
SOURCE → FAA Aeronautical Chart User's Guide, FAA Remote Pilot Study GuideCHECKED APR 21ACS II.A.K2EASY
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