What minimum obstacle clearance applies in non-mountainous areas?

What minimum obstacle clearance applies in non-mountainous areas?

• A. 500 feet
• B. 1,000 feet
• C. 2,000 feet
• D. 3,000 feet

Answer: (B)

The idea is to have a safety buffer above the terrain and obstacles along the intended flight path. In non-mountainous areas, the required clearance is one thousand feet above the highest obstacle within the protected area around the route. This margin helps cover wind drift, navigation errors, and small deviations from the intended path, keeping the aircraft safely above obstructions. In mountainous terrain, where obstacles and terrain are generally higher, the clearance is increased to two thousand feet to maintain an adequate safety cushion. So for non-mountainous areas, the minimum obstacle clearance is one thousand feet.

The idea is to have a safety buffer above the terrain and obstacles along the intended flight path. In non-mountainous areas, the required clearance is one thousand feet above the highest obstacle within the protected area around the route. This margin helps cover wind drift, navigation errors, and small deviations from the intended path, keeping the aircraft safely above obstructions. In mountainous terrain, where obstacles and terrain are generally higher, the clearance is increased to two thousand feet to maintain an adequate safety cushion. So for non-mountainous areas, the minimum obstacle clearance is one thousand feet.