Minimum terrain clearance.

CFR · 2024-01-01 · US · Title 14

Except in an emergency, when necessary for takeoff or landing, or unless otherwise authorized by the responsible Flight Standards Office for a purpose listed in § 93.309(c), no person may operate an aircraft within 500 feet of any terrain or structure located between the north and south rims of the Grand Canyon.

official document · source cfr-2024 · id 14:§ 93.311