Can a low visibility takeoff be performed with RVR missing or below minima?

A low visibility takeoff can indeed be performed if one of the Runway Visual Range (RVR) readings is at or above the minimum required for that specific approach or takeoff procedure. The RVR is a crucial metric in assessing visibility conditions, especially in low visibility scenarios.

If one of the RVR values indicates a visibility of 2 or higher, it meets the criteria established in regulations and operational guidelines, allowing the takeoff to proceed safely. This ensures that pilots have sufficient visual references to execute a successful departure.

The other options do not accurately reflect the regulations surrounding low visibility takeoffs. Taking off regardless of RVR readings or without any specific minimum requirements does not ensure safety. Similarly, requiring clearance by air traffic control would typically apply irrespective of the weather conditions, but it does not directly impact whether the takeoff can occur based on visibility metrics.