To the maximum extent possible, Air Force One will be cleared unrestricted climb to ____ or higher.

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Multiple Choice

To the maximum extent possible, Air Force One will be cleared unrestricted climb to ____ or higher.

Altitude reference matters for safety: using feet AGL (above ground level) ensures the clearance is tied to the local terrain, not to a fixed sea-level value that can vary with field elevation. When Air Force One is cleared for an unrestricted climb to a set altitude, the aim is to get the aircraft up to a safe altitude as quickly as possible without overcomplicating the clearance. Nine thousand feet AGL is high enough to clear most local obstacles along typical departure paths, yet not so high as to unnecessarily delay climbing. The “or higher” part allows the pilot to continue climbing if traffic or weather permit, without needing another clearance. Why not the other options: nine thousand feet MSL would not guarantee obstacle clearance in areas with higher terrain relative to the airport, since MSL is tied to sea level and ignores ground elevation. Eight thousand feet AGL may be too low for safe clearance in many environments, and ten thousand feet AGL would impose a higher altitude than necessary, potentially impacting airspace efficiency.

Altitude reference matters for safety: using feet AGL (above ground level) ensures the clearance is tied to the local terrain, not to a fixed sea-level value that can vary with field elevation. When Air Force One is cleared for an unrestricted climb to a set altitude, the aim is to get the aircraft up to a safe altitude as quickly as possible without overcomplicating the clearance.

Nine thousand feet AGL is high enough to clear most local obstacles along typical departure paths, yet not so high as to unnecessarily delay climbing. The “or higher” part allows the pilot to continue climbing if traffic or weather permit, without needing another clearance.

Why not the other options: nine thousand feet MSL would not guarantee obstacle clearance in areas with higher terrain relative to the airport, since MSL is tied to sea level and ignores ground elevation. Eight thousand feet AGL may be too low for safe clearance in many environments, and ten thousand feet AGL would impose a higher altitude than necessary, potentially impacting airspace efficiency.

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