On a sectional chart, airspace class is often indicated by color and line style. Which symbol indicates Class B airspace?
Why →
Class B airspace is depicted on sectional charts with solid blue lines that outline the class's characteristic concentric shelf structure around major airports. Each shelf shows the floor and ceiling as a pair of numbers (e.g., 100/SFC means 10,000 feet to surface).The trap →
Choice C refers to Class C airspace (dashed magenta in many older publications) or Class D (dashed blue). Confusing Class B shelves with Class C rings is a common sectional-reading error.SOURCE → FAA Aeronautical Chart User's Guide, Airspace ClassificationsCHECKED APR 21ACS II.A.K1EASY