Dots on TWA and Course
Post by iconPost by Klauwhamer | 2018-10-31 | 22:33:57

Hello,

Can someone explain the dots on the TWA and Course indicators in zezo
Thanks very much in advance

Bas

commenticon 8 Comments
Post by iconPost by PietjeBell | 2018-11-01 | 07:20:14
Hi Klauwhamer,
For an explanation see under Q&A.
Post by iconPost by MidnightFoiler | 2018-11-02 | 11:41:50
Don't think it talks about that. I think he means the dots/circles and squares along the green, red and blue lines that move with the mouse pointer. Have often wondered myself - the dots/circles seem to be time increments along the track but the square on the red track is weird...
Post by iconPost by zezo | 2018-11-02 | 15:18:59
Dots are 10 minutes. Larger dots are 1 hour. Circles are 3 hours.

Squares are supposed sail changes. Not very accurate, just to remind you of the possibility.
Post by iconPost by Klauwhamer | 2018-11-02 | 19:44:17
Thank you, zezo
Post by iconPost by MidnightFoiler | 2018-11-02 | 22:25:52
Aha! Thanks
Post by iconPost by MidnightFoiler | 2018-11-02 | 22:39:49
While we are talking finer points...

The TWA on a route dot isn't exactly wind dir - heading

If i set the wind field to +3h and hover the mouse next to the 3hr dot the smaller wind info box has very different wind dir/speed to that for the route info box.

How come?
Post by iconPost by zezo | 2018-11-03 | 17:25:47
The visual wind field is not interpolated over time. Only the "current" moment is, then the wind barbs are fixed to the 3-hour winds.

So if you click a dot on a thick blue line the popup info will match the wind hover box.

The track tool itself uses interpolated data for every 10 minute point.

Post by iconPost by MidnightFoiler | 2018-11-03 | 21:49:20
I see, thanks again
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