essential
likely
maybe
probably not
Front (prompt)
Class B airspace — altitudes, sectional marking, drone rule?
Plain English (default view) — short, conversational, lightly seasoned with science
🔬 Scientific / formula (revealed on click) — markdown + $$…$$ ok
B = **Big, Busy, Blue.** - 📐 **Altitudes** - Floor: surface (SFC) - Ceiling: typically **10 000 ft MSL** - 🎨 **Sectional marking:** 🟦 solid **blue** lines - 🏛️ **Shape:** inverted wedding cake — tiers expand upward and outward - 🛸 **sUAS rule:** ATC authorization required (via **LAANC**) - 🏙️ **Found at:** the busiest US airports — JFK, ORD, ATL, LAX, BOS, SFO
💡 Mnemonic / memory aid (shown on hover)
B = Big, Busy, Blue. Solid Blue lines. Wedding-cake tiers to 10 000 MSL.
Cancel