Originally Posted by
BackPacker
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Gliders do everything in metric. Speeds, but altitudes as well.
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In the UK both the ASI and the vario are in knots, and the altimeter is in feet. However we record cross-country distances in kilometers.
I know of a K21 that was imported from Spain and believe the ASI and altimeter were changed for instruments in knots and feet - I think they left the mechanical vario alone.