121 Standard Takeoff Minimums are defined as RVR and visibility?

• A. RVR 4000 or 0.75 mile
• B. RVR 5000 or 1 mile
• C. RVR 6000 or 2 miles
• D. Visibility 3 miles

Answer: (B)

Takeoff minimums are the lowest weather conditions under which a takeoff can be started. For standard takeoff minimums, the rule is a fixed threshold that applies unless a different minimum is published. That threshold can be met either by Runway Visual Range (RVR) of 5,000 feet or by a prevailing visibility of 1 mile—the two measures express the same level of visibility in different terms, and either one satisfies the standard minimums. So the statement that matches the standard is RVR 5,000 feet or 1 mile visibility.

The other choices don’t fit the standard: they propose lower or higher values or rely on a single measure (visibility) that isn’t the standard pairing with RVR.