3 ms·

> However the runway landing was 33, or 330° magnetic. They were landing on runway 23. > At the reported -9°c if the runway has been de-iced it could be dry I

> However the runway landing was 33, or 330° magnetic. They were landing on runway 23. > At the reported -9°c if the runway has been de-iced it could be dry I guess? From the NOTAM, the runway condition codes for 23 were 5/5/5, so not dry, but "good". [1] https://avherald.com/h?article=52439b47&opt=1 https://avherald.com/h?article=52439b47&opt=1

ericpauley 2y ago
5/5/5 would still be good braking action and directional control (it’s out of 6).
- fransje26 2y ago
  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/talpa/TALPA-Airport-RCAM.pdf https://www.faa.gov/sites/faa.gov/files/about/initiatives/ta...
imoverclocked 2y ago
FYI: Canadian runways use true north, not magnetic.
- yello_downunder 2y ago
  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 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.
- tjohns 2y ago
  Depends if you're in Canada's "northern domestic airspace" or "southern domestic airspace": https://www.canada.ca/content/dam/dnd-mdn/images/technical-airworthiness/english/taa-2017-02-figure-1.jpg https://www.canada.ca/content/dam/dnd-mdn/images/technical-a... Airports in the southern half of Canada still use magnetic for runways.
  - imoverclocked 2y ago
    TIL!
    - capitainenemo 2y ago
      ... for now. Goal is to get everything on True within the next 5 years. https://www.navcanada.ca/en/magnetic%20north%20vs%20true%20north.pdf https://www.navcanada.ca/en/magnetic%20north%20vs%20true%20n... The global effort. https://www.icao.int/safety/OPS/OPS-Section/Pages/Truenorth.aspx https://www.icao.int/safety/OPS/OPS-Section/Pages/Truenorth....

ericpauley 2y ago

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

fransje26 2y ago
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/talpa/TALPA-Airport-RCAM.pdf https://www.faa.gov/sites/faa.gov/files/about/initiatives/ta...

imoverclocked 2y ago

FYI: Canadian runways use true north, not magnetic.

yello_downunder 2y ago
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 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.
tjohns 2y ago
Depends if you're in Canada's "northern domestic airspace" or "southern domestic airspace": https://www.canada.ca/content/dam/dnd-mdn/images/technical-airworthiness/english/taa-2017-02-figure-1.jpg https://www.canada.ca/content/dam/dnd-mdn/images/technical-a... Airports in the southern half of Canada still use magnetic for runways.
- imoverclocked 2y ago
  TIL!
  - capitainenemo 2y ago
    ... for now. Goal is to get everything on True within the next 5 years. https://www.navcanada.ca/en/magnetic%20north%20vs%20true%20north.pdf https://www.navcanada.ca/en/magnetic%20north%20vs%20true%20n... The global effort. https://www.icao.int/safety/OPS/OPS-Section/Pages/Truenorth.aspx https://www.icao.int/safety/OPS/OPS-Section/Pages/Truenorth....