Quote Originally Posted by Gary C View Post
SoS through a medium is dependent of Density. Greater the density the faster the SoS. My first degree, plus post grad qualifications, was in surveying and this is one of the basic concepts of underwater survey. In terms of air, unless I am mistaken, Air is less dense at higher altitudes therefore SoS will be slower, therefore Baz is right and you are wrong.
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Aint as daft as I look then