Clearance Flight Plan OAT 
AeroSavvy
AUGUST 20, 2021
It’s technically an IFR procedure, but can be used by any pilot to assure clearance from obstacles. It’s very similar to the obstacle departure procedure and, like the ODP, guarantees clearance from obstacles. Since I filed an IFR flight plan, I requested the Flagstaff One SID.
Pilot Institute
MARCH 26, 2025
For example, if we were to takeoff on an airfield at sea level at 0C (32F), it would take 1520ft to reach our obstacle clearance height of 50ft. Whereas for the same airfield on a different day, if it were 30C (86F), that same obstacle clearance height would take 1880ft. That’s an extra 360ft! The post What Is Air Density?
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