tlew wrote:So now I've selected "windgrid timestamp + a time zone".
The points will show the UTC time, but that is ok for me.
After you set the "New track start" check that the displayed "Forecast Age" is correct. It should show the elapsed time since the last wind update. This verifies that the tracks will align correctly with the weather grids.
The marks on the tracks are not the time - they indicate where you are on the weather grid. For example between the "0hr" and "12hr" marks the track is using the 0h weather grid. At the "12hr" mark it switches to the 12h weather grid, and so on.
To see the weather at any point along the track go to the toolbar and display the weather grid indicated by the mark.
The same applies when you lay a track manually and mark it.
That's as I understand it.