It seems they are using the regular zero or a slashed variant depending on the risk of confusion: https://lii.enac.fr/wp-content/uploads/2021/08/B612-PolarSys...

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realo 6 days ago | parent | next [-]

Now that is an interesting picture! I am far from being a UI expert, but I do dabble and i would not have thought both forms of zero could be used in the same HMI display to lower cognitive load.

Very interesting! Thanks.

	▲	java-man 6 days ago \| parent [-]
		Different contractors, probably.

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atonse 6 days ago | parent | prev [-]

Wow that looks WAY better in the picture than in the various screenshots (and google fonts) we're all looking at. It looks very clean and legible.