What obstacle clearance does the MSA provide within its protected distance?

• A. 500 ft
• B. 1000 ft
• C. 1500 ft
• D. 2000 ft

Answer: (B)

Minimum Safe Altitude provides a fixed safety margin: within its protected distance, you have 1000 feet of obstacle clearance. This means if you’re operating at or above the MSA within the defined protected area around the navigation aid, there’s a 1000-foot cushion above terrain and obstacles. The other numbers aren’t the standard MSA clearance; 1000 feet is the established figure used to ensure a reliable margin in that area.