Information I found said your Mag Dec was 0, but then I realized that was 2006.
Here's a nifty site that agrees with you http://magnetic-declination.com/France/ ... 60984.html
Even so ... do you really want airfield type (Mag) headings for that page ?
They 'only' affect the wind rose and the arrow mouseover direction. The arrow is aligned 'true' on the assumption the map is also 'true'.
@ anyone and Jenny playing with this very old and messy code ...
At the bottom of ...DashBoard_ajax.js is the function flummox.
This needs clearing up
It's for working out cross / tailwinds on the runway
Code: Select all
function flummox() {
alice = new Array(04, 22); // these are the runway numbers which are also their rounded mag dec losing last digit
// ** CHANGE **
// nancy = val2_ave - 24;
// TO
nancy = val2_ave - mag_deviation;
Cumulus does much more now (Apparent Temp and VRB wind for example) which that old code had to work out for itself.