Obstacle-free zone (OFZ)

EASA defines “Obstacle-free zone (OFZ)” in one regulation. The wording below is reproduced verbatim from the EASA Easy Access Rules, with a link to the paragraph it comes from.

‘Obstacle-free zone (OFZ)’ means the airspace above the inner approach surface, inner transitional surfaces, and balked landing surface and that portion of the strip bounded by these surfaces, which is not penetrated by any fixed obstacle other than a low-mass and frangibly mounted one required for air navigation purposes.

CS ADR-DSN.A.002 · Aerodromes · Regulation (EU) No 139/2014 · Easy Access Rules, 13 Mar 2026 revision · Read CS ADR-DSN.A.002

Defined in the same article

accelerate-stop distance available (ASDA)
accuracy
aerodrome
Aerodrome beacon
Aerodrome elevation
aerodrome equipment
Aerodrome operator
Aerodrome traffic density

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