What does "CIG 012V029" indicate in meteorological terms?

The indication "CIG 012V029" refers specifically to the ceiling of the clouds above the ground level, expressed in feet. In this context, "CIG" specifies the cloud ceiling, while "012V029" conveys that the ceiling is variable between 1200 feet and 2900 feet. This means that within the given range, the altitude of the cloud ceiling can fluctuate, impacting aviation operations and flight planning.

Ceiling represents the height of the lowest layer of clouds above the ground. The use of "V" in the phrase indicates variability, suggesting that conditions can change and are not fixed. This is particularly relevant in aviation, where knowing the exact cloud ceiling can determine whether flying is safe under visual flight rules (VFR) or instrument flight rules (IFR).

In contrast, the other choices incorrectly interpret the information. For instance, some might suggest fixed or singular measurements that do not account for the variability indicated by the "V," or they might misconstrue feet for meters, which is also incorrect in this context. Understanding the correct interpretation of meteorological terms is crucial for effective air traffic management and ensuring safety in aviation operations.