Class B airspace — altitudes, sectional marking, drone rule?
essential airspace

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
💡

B = Big, Busy, Blue. Solid Blue lines. Wedding-cake tiers to 10 000 MSL.

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