Question 1338Navigation General

The correct answer is B) the relative humidity is 100%. When the air is saturated, it means the water vapor content in the air has reached its maximum capacity at the prevailing temperature. At 100% relative humidity, the air cannot hold any more water vapor, and the vapor pressure is at its maximum for that temperature. This is the definition of "the air is saturated". The other options are incorrect because: A) the vapor pressure being at its minimum is not the definition of saturation; C) precipitation has not necessarily commenced just because the air is saturated; and D) 100% cloud cover does not necessarily mean the air is saturated.