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 == Meaning of Aerostat == 

 I question the statement, ""The narrower and more technical meaning of aerostat refers only to tethered or moored balloons: here, airships are distinct from aerostats."" This distinction is less technical rather than more technical, since it arises from a misunderstanding of stat meaning stationary, i.e. moored. It actually refers to the lift for the craft being aerostatic, as opposed to aerodynamic. I would suggest changing this to say, ""A narrower meaning of aerostat refers only to..."" and then go on to explain the cause of the confusion. For further information, see the wikipedia article for Aerostat. 
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