In icing conditions during flight, visible moisture exists between which temperatures?

The correct response indicates that visible moisture can exist in icing conditions when the total air temperature (TAT) is between 10°C and the static air temperature (SAT) is down to -39°C. This temperature range is crucial because it encompasses temperatures where supercooled water droplets can form, which are a primary cause of icing.

In the context of aviation, icing conditions are present when there are clouds or precipitation with temperatures above freezing that can freeze upon contact with aircraft surfaces, such as wings and controls. The key to this range is that it represents a scenario where, despite the ambient air temperature potentially being well below freezing, visible moisture can still be present due to the presence of supercooled liquid water droplets. Awareness of these temperatures ensures pilots and operators can be vigilant about the risk of icing, which can significantly affect aircraft performance and safety.

The other temperature ranges provided do not adequately capture the correct conditions for the presence of visible moisture that can lead to icing, thus reinforcing the importance of the selected correct ranges in understanding icing phenomena in aviation.