Can a non-RVSM aircraft operate within the RVSM band?

• A. Yes, without restrictions
• B. Yes, but clearance is subject to traffic and RVSM priority
• C. No, never
• D. Only in emergencies

Answer: (B)

RVSM airspace is the vertical slice where reduced separation applies, and it requires aircraft to be RVSM-compliant with the appropriate equipment. A non-RVSM aircraft doesn’t meet those requirements, so it cannot rely on the standard RVSM separation. Still, ATC can authorize a non-RVSM flight to operate in that band on a case-by-case basis, issuing a clearance and managing traffic so that RVSM-equipped aircraft retain priority and safety margins. This is why the best choice is that it can operate there, but only with explicit clearance and under ATC control given traffic conditions. The other options overstate the ease or restrictiveness of the situation: it isn’t unrestricted, it isn’t categorically forbidden in all cases, and emergencies don’t define the everyday rule.