Gibraltar!

[AO1_AW_SW_USN]

Originally Posted by Ducimus

EDIT:

almost forgot, how calm the seas are also effects passive detection. If your trying to cross through gibralter and the wind is low, and seas are likecalm, the range at which they can detect you is increased. Similarly the heavier the wind, the rougher the seas, the less they can hear.

In real life, yeah it's plausable... but did they include this in the game?