The altimeters must be within how many feet in RVSM Airspace?

The altimeters must be within how many feet in RVSM Airspace?

• A. 100 Feet
• B. 200 Feet
• C. 300 Feet
• D. 400 Feet

Answer: (B)

RVSM requires tighter altitude accuracy because the vertical separation is reduced to 1,000 feet between aircraft. To reliably maintain that separation, the aircraft must have two independent altimetry systems and the altitude data they provide must be within 200 feet of each other and within the required reference. This tolerance keeps the displayed and transmitted altitudes trustworthy enough for ATC to manage closer spacing safely. Therefore, the allowable discrepancy among the altimeters in RVSM airspace is 200 feet. A smaller tolerance would be safer but isn’t the standard; 300 or 400 feet would not meet RVSM requirements.

RVSM requires tighter altitude accuracy because the vertical separation is reduced to 1,000 feet between aircraft. To reliably maintain that separation, the aircraft must have two independent altimetry systems and the altitude data they provide must be within 200 feet of each other and within the required reference. This tolerance keeps the displayed and transmitted altitudes trustworthy enough for ATC to manage closer spacing safely. Therefore, the allowable discrepancy among the altimeters in RVSM airspace is 200 feet. A smaller tolerance would be safer but isn’t the standard; 300 or 400 feet would not meet RVSM requirements.