When conducting an approach where no RVR or Ground Vis reports are available, what are the appropriate limits or restrictions?

When conducting an approach where no RVR or Ground Vis reports are available, what are the appropriate limits or restrictions?

• A. MDA, DH or DA
• B. 1200/600 RVR, 200' DA
• C. No restrictions
• D. 1200 RVR

Answer: (A)

When you’re doing an instrument approach and there are no RVR or ground visibility reports, you can’t rely on visibility-based minimums to continue or descend. In that situation the limits you use are the altitude-based minimums: the minimum descent altitude for non-precision approaches, or the decision altitude/decision height for precision approaches or APV. These minima are tied to staying at a safe altitude until you have the required visual references, since you have no reported visibility to confirm that you can safely complete the landing. You must not descend below those altitude-based minimums unless you can sight the necessary visual cues. This is why the correct choice is that the appropriate limits are MDA, DH or DA. The RVR-based or visibility-based options don’t apply when reports aren’t available, and claiming there are no restrictions would ignore the safety requirement to maintain a defined altitude until visibility is established.

When you’re doing an instrument approach and there are no RVR or ground visibility reports, you can’t rely on visibility-based minimums to continue or descend. In that situation the limits you use are the altitude-based minimums: the minimum descent altitude for non-precision approaches, or the decision altitude/decision height for precision approaches or APV. These minima are tied to staying at a safe altitude until you have the required visual references, since you have no reported visibility to confirm that you can safely complete the landing. You must not descend below those altitude-based minimums unless you can sight the necessary visual cues. This is why the correct choice is that the appropriate limits are MDA, DH or DA. The RVR-based or visibility-based options don’t apply when reports aren’t available, and claiming there are no restrictions would ignore the safety requirement to maintain a defined altitude until visibility is established.