Post by iconPost by Luis75 | 2020-05-14 | 19:43:11

Hi all! I have a question: when checking the recap of the suggested route sometimes (most of times at 100% zoom) there is a big gap between the TWA in a certain split of time and the ATWA in the same split. I guess this depends from the zig-zag route that Zezo suggests (in particular when the wind direction and intensity is not constant) but I would like to understand how to evaluate and use such value.
Thanks for all the support!

commenticon 3 Comments
Post by iconPost by zezo | 2020-05-15 | 07:43:41
I always use the track tool myself to check the real directions.

Compare the circles against the lines. You can see very well the optimum angles, when the fixed heading falls behind the fixed TWA etc.

The story of ATWA and the fact that the TWA, TWD and BTW don't always add to 360 is that

1) The router has some noise which I'm trying to smooth out
2) With the interpolated wind the wind conditions in the middle of a 10-minute track segment are not exactly the same as in the middle of that segment. So even with the exactly same data the server will move your boat a bit differently than the router.
Post by iconPost by Luis75 | 2020-05-15 | 14:24:05
Thanks Cvetan!
Post by iconPost by GeGaX | 2020-05-15 | 16:53:23
ATWA (& ABTW) is a trigonometric calculation taking into account the 10 min iterations not listed.
It is the average of the TWA (& BTW) instructions from T + 0:00 to T + xx: xx
When there is a change of tack/gybe, the calculation restarts.
I did this because I use it when I work it makes and it difficult for me to connect, so I "smooth" the instructions
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Predicted times
3
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Nord Stream *3*
11
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Game on 12Z, but Zezo still working with 06Z
3
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race wait points
1
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special boats?
7
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VR Dashboard in Firefox?
6
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ESCARGOT CLASS
11
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Los Angeles - Honolulu
26
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Rounding a Buoy
12
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VR Waypoint Heavy Bug Reporting
3
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Time of ending Jules Verne
4
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Shore detection by Zezo
2
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Nord Stream Race 2
7
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Trying to Break the VR Map Mistery !
3
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Navigating to "xxx.0" TWA
26
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Tara4 - no refresh
2
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Jules Verne: Inconsistency of headings and speeds, simulation !!
5
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VR, Zezo, Qtvlm card offsets
2
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Island's coordinates
34
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Tara Ocean 4
6
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Solo Maitre Coq
21
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Adjustable timeshift ?
3
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gate crossing question
7
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Expanded View on PC
3
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Panic at VR Nord
7
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Delays during the sail changes, or directions changes
3
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(Game wind = Zezo wind ) ⍯ (Grib winds = Windy.com)
7
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VR ending the ELO ranking.
34
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NMEA feed
128
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Dashboard Map Track Label not including the segment.tag
5
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VR ingame time
6
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VIRTUAL REGATTA and Phillip Ganier. Worst and worst every day...
7
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beta.realsail.net
2
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Escort Frigate
6
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Out of memory. If you are the developer of this content ....
17
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Question about GFS Grib
5
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RORC Caribbean 600
14
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sliding VSR
16
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Trying to use Zezo to select best combination of sails to select
7
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TARA OCEAN 3
9
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RORC Transatlantique Race
6
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Game appears stuck on 00Z weather from yesterday
4
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Sydney to Auckland
28
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Personal Message pages deleted
7
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New zezo fonction
2
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VR Ranking 2021
7
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Autosail malfunction
3
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Comments from a newbie to "long term" routing
1
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Massive thanks to Cvetan
7
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Fleet section mode record not working
2
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Possible routes on the Map tab
3
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Purple skippers on VR Dashboard
3
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UTC or CET time ?
2
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multiple routes?
2
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Real Sail
4
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Map a little gloomy
8
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Trophée Jules Verne - Route à l'envers ?
2
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Looks like weather updates offline for next 18h
26
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Bring the good old days back
7
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All.grib 0.0k ?
9
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different speed
3
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Strange 0.5 mille VR Scale
3
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Just an idea for a new feature...
7
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Connexion impossible
1
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Donations
7
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New leader - seems to be using Zezo
38
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Bravo Zezo
4
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zezo : Huge job - Huge thx
2
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Difference between boat speed display on VR, dashboard and polar curves
7
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Vendée Globe: Track lines falling too short of ischrones
8
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Tara Ocean
29
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VR winds currently not up to date ?
1
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"Sails Change" within the Programming
3
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RORC Transat finish moved to Antigua
3
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Weather update not appearing...
19
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