Which altitude provides 1000 feet of terrain clearance within 25 nautical miles?

Which altitude provides 1000 feet of terrain clearance within 25 nautical miles?

• A. Minimum Safe Altitudes (MSA)
• B. Minimum Vectoring Altitudes (MVA)
• C. Minimum Crossing Altitude (MCA)
• D. Minimum Reception Altitude (MRA)

Answer: (A)

Minimum Safe Altitude is the altitude that guarantees at least 1000 feet of obstacle clearance within 25 nautical miles of a navigation facility. This makes it the measure used to ensure safe terrain clearance in the area immediately around a VOR or other navaid, which matches the requirement of providing 1000 feet of clearance within 25 NM. The other minima serve different purposes: minimum vectoring altitude is for radar vectoring safety, minimum crossing altitude is the altitude to cross a fix, and minimum reception altitude is the lowest altitude at which a navigation signal can be received.

Minimum Safe Altitude is the altitude that guarantees at least 1000 feet of obstacle clearance within 25 nautical miles of a navigation facility. This makes it the measure used to ensure safe terrain clearance in the area immediately around a VOR or other navaid, which matches the requirement of providing 1000 feet of clearance within 25 NM. The other minima serve different purposes: minimum vectoring altitude is for radar vectoring safety, minimum crossing altitude is the altitude to cross a fix, and minimum reception altitude is the lowest altitude at which a navigation signal can be received.