Editing

**Class B airspace ("Big / Busy").** - **Floor:** surface (SFC). - **Ceiling:** typically **10 000 ft MSL**. - **Shape:** inverted wedding cake — progressive tiers expanding upward and outward from the busiest airports (ATL, LAX, ORD, JFK, SFO, BOS, etc.). - **Sectional marking:** **solid blue** lines. - **Drone rule:** always needs ATC authorization (Part 107.41 / LAANC).

Cancel