Zezo forum:

Post by GauchoX | 2019-12-10 | 08:49:29

Hello

Great job that yours

I started on the JVT a few days ago but the routing does not offer anything from the island "Vila dos Remedios"

Is this a bug or a setting that I would not have done correctly or is it just normal?

Thanks for your feedback

GauchoX

13 Comments

Post by zezo | 2019-12-10 | 09:59:14

There is no way to do a round-the-world with a single destination point so you have to set your routing destination manually as you go.

Right mouse button -> Go To.

There is a predefined list of waypoints in the Southern hemisphere, but they can be a bit out of the way, depending on the weather. You can also set arbitrary destinations.

Fernando de Noronha is set as defaut destination just to get you started. It's very likely the route will pass close (like 90% of the time)

Post by GauchoX | 2019-12-10 | 15:01:46

Thanks

GauchoX

Post by YourMomSA | 2019-12-11 | 17:42:22

Hi Cvetan -

I'm coming up on 140E, south of Hobart, and it'll give me a routing to Cape Horn now... But the isochrones stop at 90W for some reason. How far East to I have to go before the isochrones will proceed to Cape Horn along with the actual routing?

I ask because everyone in the group I'm with will need to make a decision tomorrow on whether to take a North route or a South route, and I think being able to see the isochrones between 90W and Cape Horn would be helpful in the decision.

Thanks!
-Mom

Edit: Sorry - I just realized they show up if I zoom all the way out to 1%. So nothing is wrong... it's just the scale is huge at this distance. Difficult decision to be made tomorrow. I'm also toying with going all the way to the antarctic coast, but can't see a way to make it work. I'm hoping to one day get a JV run going where I can spend a couple days at high speed below 70S...

Post by alulo | 2019-12-12 | 10:24:44

pourquoi une difference de routage entre zezo et virtual?

Post by BooBill | 2019-12-13 | 03:29:54

This game needs ice gates.

Post by YourMomSA | 2019-12-13 | 14:18:13

VR itself has them, but they haven't used them in a while. For things like Spindrift, they wouldn't anyway... because the actual Jules Verne record rules don't have an ice limit (that I know of). But for races like Brest, which just ended and the real-life event had an ice limit, I'm not sure why they don't.

The last time I recall them using actual ice limits (and perhaps the only time since VRO3 was introduced) was the last Vendee Globe. They were poorly implemented and buggy. The rule was a 70% speed reduction whenever you were on the wrong side of the line... But... It wasn't always applied exactly where the line appeared to be. It was very close, but when conditions warranted short-tacking along the line, precision mattered. The other bigger issue was that if you did a maneuver close to the line (such as tacking away), it seemed to evaluate your compliance based on where you would have been at the end of a 10-minute cycle on your prior course, or something like that, so you'd tack away and then find yourself doing 30% speed while still being on the correct side of the line. Also, it seemed to take at least 10 minutes of being on the right side of the line to clear the penalty.

I wouldn't mind at if they reintroduce ice limits, particularly for events where the real race has ice limits, but only if they can make it work cleanly and reliably. Either that, or define the limit with a string of buoys or gates instead of an actual line.

Post by WaterHammer | 2019-12-16 | 17:05:52

Hi Mom,

I think the isochrones show up east of 90W after you cross the 180EW meridian.

Kind regards,

Anton

Post by YourMomSA | 2019-12-13 | 20:22:20

An interesting point I just noticed... Zezo's chart handles all of the antarctic ice shelves (best-known is the Ross Ice Shelf) as land... but the game handles them all as navigable water. Most of the time, the weather patterns make this irrelevant... but there could be occasional weather systems where it would be worthwhile to sail into the Ross Ice Shelf, or perhaps to do some coastal sailing in the Fimbul or Shackleton shelves... Unless Cvetan decides one day to make adjustments to remove those shelves, Zezo wouldn't recognize those routes as viable options.

Post by zezo | 2019-12-13 | 20:33:49

I think it's more about the projection (and the lack of it here) than a real difference in coast outline. Features are scaled 5 times at 80S in a Mercator chart.

Post by YourMomSA | 2019-12-13 | 21:18:49

It's hard to judge most of the shelves because they're narrow and you're correct about the distortion... But the Ross shelf is a clear difference. In the game, you can sail off the bottom of the screen between 160 and 170W, which would get you to at least 88S, whereas the router's map can't go south of about 78S. If you look at a map of Antarctica that shows the shelves, it appears that the shelf corresponds to the difference.

https://scripps.ucsd.edu/centers/iceshelfvibes/wp-content/uploads/sites/44/2014/09/map_USGS_LIMA_antarctica.jpg

The Ronne shelf is another clear one (and Filchner), but I can't imagine ever having reason to route through there, whereas I could believe it would be worthwhile to go south of 78 in Ross' location in some weather patterns. Berkner Island is what makes it clear... The island is visible in the game and the water around it is easily navigable, whereas the router stops at the edge of the ice shelf.

I believe the same is true of the smaller shelves like Shackleon and Fimbul, because the game shows peninsulas and islands within the shelves whereas the router mostly shows the edge of the shelves themselves.

It's rare for this to matter, and not realistic to be racing down there anyway. I'm not trying to push for a change. Just commenting on the observed difference. I have no idea how hard it is to adjust that kind of thing. My guess is that Shackleton and Fimbul might be both the most helpful to clean up and the most difficult, since the land features are complicated under those shelves.

In fact, cleaning it up could have negative side-effects... Particularly with Ross. Long-range routings to Cape Horn could decide to go down in there and then refuse to come back out.

Edit: PS... One of the things I've enjoyed most about this game over the years is looking at global geography while racing... Looking at satellite images of random islands in the middle of the ocean or in the Philippines, looking up information about the people and economies, etc. In this case, it's just that I ran into some interest about the Antarctic coastline... not a criticism of Cvetan's outstanding work.

Post by zezo | 2019-12-14 | 09:57:08

I can see in now. No idea where VR got the continental look - standard GSHHS shoreline follows the actual ... shoreline.

But it's highly unlikely that passing below 80 can be useful. First, because of the general weather pattern - you end up on the wrong side of the systems, and second, because the weather follows the actual shore.

I still remember that time I won 2nd place (after a long fight) in leg2 of Tour de France. That year France was drawn as an island and it was actual "around France".

So we were sailing in the Alps and the wind was still blowing down the valleys. That observation helped me a lot.

Technically the collision chart here is a black and white image. You just edit it in photoshop to add features . http://zezo.org/raster.png

But this one is limited to 80S/N to save some memory.

Post by BooBill | 2019-12-14 | 01:29:56

I hear you there Mom. As a result of being a fan of offshore racing, both real and virtual, I know more about the Kerguelen Islands than anyone should. If I ever find myself booking travel there it will be time to enter a 12 step program. ;)

Post by Ayre | 2019-12-16 | 20:01:32

Subj.: Abbreviations BTW STW ATWA ABTW

I cannot find any site explaining the abbreviations BTW STW ATWA ABTW used in the table of the Route zezo app. Is there anybody who can help me?
Ayre