Post by iconPost by wakeup | 2020-05-31 | 21:43:17

I am surprised that zezo very rarely propose the VMG as the good route?
Of course sometimes you have to luff up or bear away because of Wind rotation but sometimes you just have to make VMG route and zezo very rarely propose it?
Is it a silly question?

commenticon 4 Comments
Post by iconPost by BooBill | 2020-05-31 | 23:18:47
If you are close to the front in the Tahiti race, there's going to be a gybing duel for the next few days. Sail max VMG on each tack and see how your gap to the leaders is.

Difference in VMG between max and sheeted in 5 deg is tiny. Difference in boatspeed is huge. There are often times that you want to make it to stronger wind faster. Since zezo knows where all the puffs are with certainty till the next update, it's often steering towards wind at the expense of max VMG. IRL you could never do that, since you never know with precision where the puffs are going to be.
Post by iconPost by wakeup | 2020-05-31 | 23:37:03
OK got it. In fact I am close to the front in Tahiti race and I am really hesitating between VMG and following more accurately zezo's routing ;) .
I'll try to manage it the best way I think it could be (and probably loose compare to follow zezo :-D ).
It is now time to program for the night.
TY.

Post by iconPost by YC6211 | 2020-05-31 | 23:39:53
You need to try to figure out why zezo is routing you where it is. Is it sending you into more breeze? Is there a subtle shift it's positioning you for? Zezo will tell you to sail VMG if it's the best route, if it's telling you to do something else it has it's reasons.
Post by iconPost by zezo | 2020-06-01 | 07:46:44
The router knows the VMG angles, but does not have a preference for them, and as noted above, sometimes the polars are quite flat around that spot, VMG-wise.

That's is why the red and green line of the projected track exist - they let you compare a fixed TWA/HDG course against the isochrones and decide yourself where to point the boat.

My usual process is to check the projected track then check the polars for the VMG and possible sail changes, also for sail crossover points.

Sometimes polars have dips that make it faster to sail TWA 65 and 75 alternatively instead of straight 70 - See the Maxi polars at 16 knots TWS (also at TWA 130 there). The router usually gets that, but still may not propose the exact optimum route, or may suggest a change more often than needed.
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How to manage buoys during absence
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Vela- route choosen by your mom
6
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VR Team ranking race criteria
1
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No news from Virtual Regatta about VOR (the ocean race).
1
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Log-in VR game marathon..
5
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VR Dashboard
5
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Dashboard - Precdicted Time ATLANTIC RECORD
1
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the prawn star
9
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polars virtual regatta
8
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how to convert Grib files to Grib2?
3
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VSR, XP points
7
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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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Dashboard not updating.
6
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