why do none of the speeds match up? it was doing this with MPH too (i didn't test for KPH, however, i think the central HUD is measuring KPH. i don't know about its mach number tho.)

when i was measuring in MPH i saw that the UI speed was measuring TAS, so i think the right side HUD is measuring IAS, and i think the mach number for the central HUD is IAS. it makes sense

and the metric unit allegations for the central HUD line up with the fact that converting the altitude in feet to meters line up with the number displayed on the right side of it.

altitude lines up:

speed lines up: (measured off the IAS, so that means the central HUD is measuring IAS)

the inferior units are sneaking into my HUD!! soon you'll see a british watermark on my jet's stabilizers