Post by iconPost by Ursus Maritimus | 2017-12-18 | 22:22:22

right now (20:20 UTC), there is an imminent gybe for everyone. what is the best moment to gybe?
- just follow like a lemming zezo's 10 minute intervals?
- wait until some others gybe?
- look at when the angle to rumb line becomes the same on port and starboard?

what decision protocol does the router use here?

commenticon 9 Comments
Post by iconPost by zezo | 2017-12-18 | 22:27:39
I'm in a position that suggests gybe in an hour, so I'll wait for the next GRIB to make the jump.

In general it's better to be few minutes late than few minutes early because you never want to sail outside of optimum TWA angles.
Post by iconPost by Ursus Maritimus | 2017-12-18 | 22:34:51
why are most sailing at 140 where 141 gives 0.01 kts better vmg ?

or is it because they choose speed and hope for better vmg anyway ;)

the next grib starts loading in zezo in about an hour, right?
Post by iconPost by zezo | 2017-12-18 | 22:41:32
Because of the VMC. VMG is only good in static conditions. In a shifting wind field it can make sense sailing at 140 or 135 or 130 if places you in the right place at the right time.

The other thing is that indicated optimum might be 141, but 140 gives you exactly the same VMG. Sometimes the polars have a flat spot and the entire 140-146 range gives the same VMG, and then you optimize for minimum gybes and maximum time asleep.
Post by iconPost by Ursus Maritimus | 2017-12-18 | 22:45:43
okay, but vmg reported is vmg upwind or downwind, not vmg towards the mark.

zezo tells me to gybe right now. maybe I take a gamble, otherwise I won't get any better than 200 of all the lemmings for sure ;)
Post by iconPost by zezo | 2017-12-18 | 22:51:44
Yes, that's the VMG/VMC distinction.

It's always a gamble. In the real world you look for the gusts in the water and you look at the clouds. In the virtual world you look for the next GRIB and the difference from the previous one.

Post by iconPost by Ursus Maritimus | 2017-12-18 | 22:53:29
gybed at 20:50:53, teking the penalty like everyone has to ...

Kroosdoiker, Alina and Marinus from Zurich Yacht Club gybed even earlier!

let's wait and see what the grib brings us
Post by iconPost by Ursus Maritimus | 2017-12-18 | 23:49:38
first hour was great, from 193 (dtl 4,20) to 135 (3,54) and no nasty surprises from the grib

*happydjmike*
Post by iconPost by Skully62 | 2017-12-19 | 02:03:26
I gybed earlier as I was a few miles behind the leaders as I was headed more. You were talking about grib and also how often zezo updates can you please explain. Thanks
Post by iconPost by zezo | 2017-12-19 | 06:57:10
See this http://zezo.org/forum.pl?tid=6109
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special boats?
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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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Dashboard not updating.
6
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Boats Skins Vendée Globe
3
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Safari on iOS: Bearing lines gone
3
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Wrong coordinates in zezo
2
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Winds in the chart do not show changes between 78 hours and 114 hours forecast
2
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Decoding of All grib
6
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I CANNOT ENTER FOR 3 HOURS IN THE GAME
23
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Why the vc data is yellow underlined ?
3
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Jules Verne 2020 - "Start NOW" discrepancy VS real time
7
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Would like to know the reasenable time to update your pisition on zezo
16
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Arrival Vendée Globe in Normandy !!?
4
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MIssing the Obvious: How to get Zezo routes back into VR
2
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VG 2020-01-02 has Zezo a problem with geographic or ...
8
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How to retrieve a waypoint (TWA/HDG) that already passed...
16
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Track duration window
3
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Ways to bypass the client to give orders?
6
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Problem to Load zero route in windy.com
40
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French tutorial for zezo
4
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boat positioning
2
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Export routes in GPX format ?
4
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Sail selection issue ?
11
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Your friends boats in Google Earth
2
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Delay in Wind update ?N
1
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VR Dashboard
54
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