Aviation is far from metricated. On the engineering side we still say pounds per square inch and flight levels and vertical separation minima are in feet.
There is a safety hazard in unit confusion and readers may recall an incident with an Air Canada Boeing 767, when fuel was uplifted in one set of units and signed for in another, resulting in the aircraft running out of fuel in mid-air. Conversion factors are well known, but I would not be impressed by being told to change over units mid-way across the Atlantic.
Steven Scott Thornton Heath, UK
Source: Flight International
