What should be recorded in column 8 and column 14 if the RVR for runway 06 left is not functioning?

In the context of surface weather observation and reporting, column 8 is typically used for runway visual range (RVR) data, while column 14 is used to indicate the operational status of RVR equipment. When RVR for a specific runway, in this case, runway 06 left, is not functioning, it is essential to record that there is no required entry in column 8 because there isn’t a valid RVR measurement to report.

Column 14 should reflect that the RVR is not operational, which is indicated by the entry "RVRNO." This notation confirms that the equipment responsible for measuring the RVR is currently inoperable, providing critical information for air traffic management and flight safety.

The other choices suggest either faulty information, such as reporting a measurement where none exists or misrepresenting the status of the RVR equipment. This highlights why noting "nothing required" in column 8 and "RVRNO" in column 14 is the appropriate response for this scenario.