VFR Obstacle Clearance Requirements

Once again, there are various exceptions when it comes to minimum altitudes and distances, based on the operating context.  Let's see if we can make some sense of it all.

Except for the purpose of take-off or landing....

CAR 704.23 (Commuter)

• Day: must be at least 500 AGL and 500 feet horizontal from any obstacle
• Night: must be at least 1000 feet above any obstacle within 3 miles of route

CAR 705.32:  (Airline)

• Day: must be at least 1000 AGL and 1000 feet horizontal from any obstacle
• Night: must be at least 1000 feet above any obstacle within 5 miles of route (2000 feet in mountainous regions)