5/5/5 would still be good braking action and directional control (it’s out of 6).

I stand corrected.

5 is not "poor", but "good", with a wet runway or one with light snow or slush. [1]

[1] https://www.faa.gov/sites/faa.gov/files/about/initiatives/ta...

FYI: Canadian runways use true north, not magnetic.

Depends if you're in Canada's "northern domestic airspace" or "southern domestic airspace":

https://www.canada.ca/content/dam/dnd-mdn/images/technical-a...

Airports in the southern half of Canada still use magnetic for runways.

TIL!

... for now. Goal is to get everything on True within the next 5 years. https://www.navcanada.ca/en/magnetic%20north%20vs%20true%20n...

The global effort. https://www.icao.int/safety/OPS/OPS-Section/Pages/Truenorth....

I had to look this up, and I found the answer interesting because I used to develop software to accurately report magnetic declination at any point in time, for directional drilling oil wells in Canada. https://www.geomag.nrcan.gc.ca/mag_fld/magdec-en.php has some great information on why. For example, Yellowknife can experience declination changes over one degree every three years.

I haven't used a compass since I was a kid and at that time declination where I live was 21 degrees. Now it's down to 13 degrees. I had no idea it changed that much.