Which equipment is required for RVSM operations?

• A. Two independent altitude measurement systems, an altitude holding system, an altitude alerting system, and a transponder with altitude reporting (Mode C)
• B. A magnetic compass and weather radar
• C. A single inertial reference unit
• D. A basic transponder without altitude reporting

Answer: (A)

RVSM operations rely on precise and reliable altitude information, with built‑in redundancy and automatic altitude control to maintain safe separation. The required setup includes two independent altitude measurement sources so a failure in one source doesn’t jeopardize altitude data, an altitude-keeping system to actively maintain the assigned flight level, an altitude alerting system to warn if you drift or if an altitude is not being held correctly, and a transponder that reports altitude (Mode C) to air traffic control. Together, these elements ensure accurate altitude awareness, automatic control, and proper altitude reporting in RVSM airspace.

The other options don’t meet these needs: a magnetic compass and weather radar don’t provide the necessary altitude data or monitoring; a single inertial reference unit lacks the needed redundancy; and a basic transponder without altitude reporting can’t convey altitude information to ATC or satisfy RVSM requirements.