Class D airspace — altitudes, sectional marking?
essential airspace

D = Dashed blue Donut.

  • 📐 Altitudes
    • Floor: surface
    • Ceiling: typically 2 500 ft AGL
  • 🎨 Sectional marking: 🟦 dashed blue lines
  • 🏛️ Shape: single cylinder, ~4–5 NM radius
  • 🛸 sUAS rule: ATC authorization required (via LAANC)
  • 🏛️ Found at: small towered airports
💡

D = Dashed blue Donut. Small 4-5 NM cylinder, 2500 AGL.

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