Weather Routing
Where can I fing the VPPs (Velocity Prediction Polars aka "polars") for my boat ?
Why to use customized polars ?
I have created my customized VPP with Avalon VPP. How to load them into Avalon ?
How to load external grib files, retrieved from Internet or Saildocs ?
How to select my preferred Weather Sources for my navigation area ?
How to use Avalon Offshore with a satelllite phone (Iridium, Iridium Go, Inmarsat) ?
Please feel free to use this page to ask any technical question
does the map weather cover EGYPT RED SEA area ? and for how long days does the forecast for weather cover ? like forecast for 2 or 3 days ahead ? or i need update it daily ?
Yes, there are less models available for Egype as we have for Western Europe or USA, but we have the NOAA GFS model.
It covers the world with a granularity of 0.25 degree (approx 12 km) and includes almost 400 hours of forecast (14 days)
It includes wind and gust, temperature, rain, clours, thunderstorms, etc
It is updated 4 times a day.
You can find mode information on production times here:
https://www.avalon-routing.com/wp-content/uploads/2019/11/Weather-Sources-En.pdf
How do I request a polar for a stock Beneteau 423 (not performance) with a 140% genoa?
No problem, I will add the Beneteau Oceanis 423 (stock) in the database.
The Oceanis Beneteau 423 ‘stock) is now available in the library of polars
Good sailing,
Phil
excellent uk maps available soon ill reload avalon again as i will be able to use it now
Thanks,
Yes we have signed a licence agreement to integrate Admiralty charts into Avalon. We are starting with UK, Croatia, Spain and Portugal.
We have also added the mega quilted charts from the NOAA. Those are free. Their quality and precision and really great. We will use the same technology to integrate UKHO charts.
Phil
Is there a polar of a Beneteau First 47.7 available?
Thanks. Andreas
Not yet but I can add it.
Please note that this polar will only be available within Avalon.
Once you have confirmed that you are an Avalon Offshore user, I will calculate and add this polar.
Hi Phil, i’m a Avalon offshore User V3.0.1. My Premium ends at 2018/04/28. I’ll use it first time in a few days in a race.
And how can i add more than 1 waypoint?
Thank you! A
Hi Andreas,
I will calculate and add the First 47.7 tomorrow so that you have it for the race.
Please feel free to send us a picture of your boat if you want that we illustrate our polar database with it.
Do you need the racing option for the race ? It is free in 2017 and will help you manage the start. If yes, there is a doc on how to get access to the racing version here: https://www.avalon-routing.com/new/documents/users-guide/
To add a second waypoint (and a third, a fourth, etc, etc), just tap on the blue line between the start and the first waypoint or the first waypoint and the arrival.
You can create as many as you need with different parameters on each of them.
I let you know when the 47.7 is ready.
Good regatta,
Phil
..sounds great Phil.
I got this waypoints and i created an Account with my mail adress. Do you need my Id-nr as well?
And i’ll send a picture of my 47.7 to the devt mail, maybe it’s ok..
Many Thanks!!
Andreas
I got the picture… very nice boat… thanks
To validate you on the racing option, I need the id that you created when you connected to Avalon Cloud.
Thanks,
Phil
Hi Phil, thank you for the 47.7 polar, looks very good….
But the App makes trouble. If i load a saved route or use an old route, the app freezes in the computing window. And i have to delete the App and Start again!? Do you have an idea?
Regards. Andreas
This can happen when you use routes that have been saved with an older version of Avalon, as saved route parameters have evolved over time.
Please make sure that you are always using the latest Avalon version (now 3.0.1) and that should ensure consistency between saved routes.
Another suggestion is to save your routes (calculated or navigation) on our server using the Avalon Cloud facility. This can also be use to share routes between tablets or even between friends.
Phil
Hello Phil, do you have the polar files of an RM 1200/Fora marine? I am thinking of starting with Avalon …
Hi Christian,
You will get much better results if you calculate the vpp by yourself using our Avalon VPP system as they will be customized to your boat setup.
Please see the tab VPP on this site. There is also a video tutorial.
However, il you prefer, we can calculate and add to our library a standard VPP file for the RM 1270
Phil
Plz load a Pearson 40 VPP.
Thks
Hi,
Should we load them in the standard library or as a model in Avalon VPP ?`
The 2 options are possible but Avalon VPP is better as you can customize them as needed.
Which sailsets do you need ?
Phil
Hi,
I use Avalon offshre on 2 iPads with the same apple id. I have a subscriptet navionics app. On 1 ipad it‘s not a probleme to login to navionics, and down load the navionics charts. On the second iPad I have no chance to login to navionics. What can I do?
Wolfgang
Hi,
I also have a Navionics (demo) account and I could login from both my iPad and my iPhone from Avalon.
Avalon is just acting as a gateway. There is no limitation in our app on the number of devices that could use Navionics.
Can you contact the Navionics support and let us know ?
Thanks,
Phil
I am trying to use your VPP calculations to see the theoretical impact of a folding prop, a larger headsail and/or main sail.
I am probably doing something wrong but I seem to get the exact same “polars” every time.
My boat is a 2002 Beneteau 361 with in mast main furling.
Thanks in advance for your help,
Gerard
Hello,
There should be differences as the parameters you are modifying are considered in the calculations.
Can you send me the screenshots of your Avalon VPP parameters screen and I will make the calculations myself to ensure it works ok.
You can send your screenshots to support@avalon-routing.com
Hi,
I have not got your screenshots so I did some tests on the Oceanis 361.
The systems seems to work ok. Maybe a problem of cache with your browser. Did you save your parameters before computing a new hypothesis ?
Here is what I got:
Case 1: fixed propellor
Case 2: fold blades
Case 3: Main sail + 5 square meters, standard genoa, fold blades
Thank you for your quick response.
I don’t know what was going on but I am now also able to see some small differences on the graph.
Is there a way to get a table similar to the one you used in your answer?
My main interest was to see the theoretical effect of a larger genoa (135% to 155%) when sailing in the 105-180 TWA range. Does your model consider using a whisker poll in this high TWA range? or is it possible to add this input?
Thanks again for your help,
I will use your product during a 250 nm passage next week.
Gerard
We do not provide the data in a table format for obvious competitive reasons…. but it is exactly the same data that you will get in Avalon.
But if you download the set of VPPs that you need to analyze in Avalon itself (please refer to our doc or our video tutorial to see how to do this… it is pretty simple), you just need to go to the settings of the selected polar and display the exact value for a given twa and tws. You will then get exactly the same data that I showed on the tables. Much more precise than the graphs on the web site.
I think this will enable you to complete your analyses.
Phil
Hello I would be interested in purchasing the VPP for the Micro Challenger 2000 but I don’t know if it is available in your database.
Thanks a lot in advance.
Yes, we have in our library of standard polars the Micro Challenger, the Bravo Challenger and the Horizon Challenger.
But those VPPs are not for sale. They are provided free of charge to Avalon Offshore users.
As an alternative, you can calculate them using our Avalon VPP tool that you can access on our site. There is also a documentation and a video available. It will give you a good idea of your VPP.
As a second alternative, if you are using another weather routing system, you may consider asking this VPP from the provider of your weather routing system.
Best regards,
Phil