Originally Posted by
CAPS_pin_removed
Please see above from ETOPS: "Just to correct a bad piece of fake news from the OP, the forthcoming met uploads from Pilotaware are standard Metars with visibility in nautical miles as is usual in the UK.
The colour coding proposed has absolutely nothing to do with military operations - many light aircraft pilots will have no knowledge of RAF procedures anyway."
METARS in the UK have to my knowledge used metres and kilometres for met visibility for over 50 years; this system being US based uses statute miles not nautical miles.