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Profile for dtayls



Name dtayls
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Posts29
  • Re: qtVlm thread
    Board » Technical Support
    Interesting. I wasn't aware of the 'selection tool'. I'll have to give it a go.
  • Re: Weather - Brain Storm
    Board » General Discussion
    I agree with you @Zorba that "random factors should come from the weather itself".

    As you know I like the idea of using a different and more accurate model (perhaps ECMWF) for the underlying simulation but that might depend on gaining access to a high quality model to which most users do not have access.

    Another approach might be to introduce a certain degree of randomness in to the simulation's weather model, but what should the source of this randomness be?

    One option would be to choose a random mix of two or more models. This could be (a) fixed for the whole race or (b) change over time or (c) vary by lat&lon across the GRIB or (d) both meaning <x,y,t>.

    If model volatility or uncertainty GRIBs were available then this could also be used to add a little to the randomness model but I suspect many would consider this to be a step too far :-)
  • Re: Weather - Brain Storm
    Board » General Discussion
    While they do indeed say "you will need to accept the terms of the ECMWF Standard licence and pay for the associated data and handling costs." what if that cost was $0 or the equivalent in Euros? I think you will find that their licensing model depends very much on how the data is to be used. The fact that SOL is a not-for-profit, that the data would not be made available for download to end users, and that we would not require 24x7 support might all have a big impact on the quoted price. Maybe someone should contact them and request a quote.

    As it stands in SOL we are given perfect weather information for each 6 hour window which is a little unrealistic. What's more, some people know the idiosyncrasies of how the SOL server interprets the data and are therefore able to use that knowledge to their advantage. Is this really fair? And given that we allow this and the use of routers then we'd might as well allow full autopilot control of our boats!

    If there is instability in in the weather then I would expect the underlying weather to reflect that and probably differ from the predictions. Those who understand the weather the best will generally make the best decisions and may even have a chance at winning over those who can drive the tools to perfection.

    Ideally the underlying weather model used in the SOL simulation is based on the most accurate available. But some people may have access to this unless we 'rule' it out. So maybe we could also introduce some variations in to areas where the model is unstable. Again, this could be fun :-)
  • Re: Weather - Brain Storm
    Board » General Discussion
    VIbex: The key to my idea is to use an underlying weather model for the simulation which powers our virtual boats that is different from the predictions available to SOL competitors.

    I agree when you say "we're not actually living on the boats so you need some measure of predictability" but I don't think that means we need to be able to 100% predict the weather.

    When the weather is very stable and highly predictable then the models will likely be very closely aligned. In those cases it might be safe to sail very close to a mark or an island, but when the weather is less stable you might choose a wider safety margin over absolute performance.

    As for the question of using 'rules' to control which models can or can't be used, there is always going to be someone who wants to cheat.

    Ideally, I like the idea of using something like a pre-release beta version of the ECMWF model not generally available except to researchers, if such a thing exists. Another alternative might be a psuedo-random merge of multiple model GRIBs ... This could be a fun project :-)
  • Re: Weather - Brain Storm
    Board » General Discussion
    Also, they explicitly mention not-for-profits in their license selection guidance so you're just dreaming and there's little point in trying to ask anything from them.
    --
    i.

    Is it possible to get access to the ECMWF model for internal use only on the server while using the GFS model in the gribs provided to users?

    It seems to me that this would fit the licencing requirements for the not-for-profit use of the real-time ECMWF data.

    It would also be closer to reality in that the underlying model used on the server would be different to the forecasts available to users.

    There may also be a need for a new SOL rule that makes it illegal to use commercial paid-for products not available to all users for free.

    I think this would make for some more interesting racing.
  • Re: AGL14 Releases
    Board » Technical Discussion
    14.2.3 doesn't seem to automatically download GRIBs anymore :-(


    Looks like this only affected the Mel-to-Osaka race. Seems to work perfectly in other races. How bizarre!
  • Merge of steering and DC tabs
    Board » General Discussion
    I really like @Zorba's idea of merging the 'steering' and 'DC' tabs. Maybe allow for 8-10 lines of DCs bacause if anyone is using more then they are probably using other tools to generate them.

    It would also help to be able to set an actual time rather than just a delay period.
  • Extended predictors - Suggestion re the hourly indicators
    Board » General Discussion
    Love the new extended predictors. Thanks @ij.

    One small suggestion: Hourly indicators are open circles. Perhaps fill every 6-hourly circle to make a large dot. This would help in interpreting the longer predictors.

    The longer predictors will be really helpful when training up those new to SOL. The curly-whirly patterns can be very instructive.
  • Re: AGL14 Releases
    Board » Technical Discussion
    14.2.3 doesn't seem to automatically download GRIBs anymore :-(

    This might help explain it:

    Exception in thread "Thread-1" java.lang.NullPointerException
    at grib.GribFactory.waitForGrib(GribFactory.java:215)
    at grib.GribFactory.run(GribFactory.java:146)
    at java.base/java.lang.Thread.run(Unknown Source)


    --- Last Edited by dtayls at 2020-09-07 04:30:17 ---
  • Re: Poetry Saved for Posterity
    Board » General Discussion
    Pushing haiku to new limits:

    Laozi *pokes
    bonknhoot
    what the *

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Current Races:

San Diego Islands Race 2021

Sailonline is partnered with San Diego Yacht Club for the 2021 Islands Race. This year we are racing TP52s to compete against the real crews in the 132nm course from Long Beach, around the Catalina Islands to San Diego.
Race #1435
INFO by brainaid.de
TP52 PARTICULARS
NAM_AWIP WX Updates:
0245 / 0845 / 1445 / 2045
Ranking: SYC
Race starts: Mar 05th 21:00 Registration will open soon

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Bora Experience 2021
Visit the Adriatic Sea for Bora Experience 2021.
Bora winds are feared by local sailors and tend to blow most strongly during the winter months, reaching record speeds above 200 km/h (125 mph). In our virtual Seascape 18 we fear not, and you are invited to race from Venice to Dubrovnik, navigating between the islands along the Croatian coast.
Race #1448
INFO by brainaid.de
Seascape 18 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: SYC
Race starts: Feb 27th 16:00 Registration Open!

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New Hebrides Slalom 2021
Welcome… back to the carved-out coastal backdrop of New Caledonia’s opencast nickel mines, for a quick getaway in elegant Italia 14.98's to the islands of the Coral Sea across the Loyaute Basin and on via a mazy zig-zag north to a finish line in exotic Vanuatu's Big Bay. Only 578nm; enjoy!
Race #1425
INFOby brainaid.de
Italia 14.98 Particulars
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking:
SYQ1 - SYCCH - SUPSOL - SYC
RACE CLOSE: Thursday,
March 4 at 2300 UTC.
Race starts: Feb 23rd 18:00 Registration Closed

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Aland Sea TIMED Race 2021
Norrtalje Segelsallskap, 70km NE of Stockholm was founded in 1920, and time was when the society’s season opened with a challenging offshore race from the club line off Flaten island at the mouth of the long and narrow Norrtaljeviken, out onto a triangular course around the Aland Sea, to finish at Simpnas slightly to the north on Bjorko island - some 78nm in total. A fine race that SOL, being from these parts, ran annually up until 2013. Last run in autumn 2018, we return here to race the course again in the form a TIMED RUN in our flashy Club Swan 50s.
RE-REGISTER HERE to race again after finishing a run.
Race #1444
INFO by brainaid.de
Club Swan 50 Particulars
WX Updates:
0430 / 1030 / 1630 / 2230
RANKING:
TRQ1 - TRCH - SUPSOL - SYC
RACE CLOSE: Sunday, 28 February at 23:00 UTC
Race starts: Feb 15th 12:00 Registration Open!

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CCA Delivery Cruise 1 2021 - Sandwich MA to Halifax NS

The Cruising Club of America invites you to join them on a (virtual) delivery cruise starting from Sandwich, Massachusetts, the oldest town on Cape Cod in the USA to Halifax, Nova Scotia, Canada, some 354nm away. Once we clear the tip of Cape Cod at Race Point our rhumb line course will be 70 deg T for 225nm across the Gulf of Maine to Cape Sable NS, so the best delivery departure window for sparing the crew and gear pounding into a northeast winter gale across Browns Bank will likely be following a frontal passage with strong favorable westerly winds. You may choose one of two boats, both tailored for cruising and new to Sailonline's boathouse, so flip a coin, study their Particulars sheets and make ready! You may start at any time after 1900utc on 8 February 2021 and you must arrive in Halifax by 4 March at 2300utc.
Race #1417
INFO by brainaid.de
Santa Cruise 52 PARTICULARS
Passport Cruise 40 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
RANKING: NONE
Race starts: Feb 08th 19:00 Registration Open!

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Haifa to Sao Vicente - 2021 ESRW - Leg 1
Welcome to bonknhoot’s alternative round the world race, there where it is wide, in six legs, following the setting sun – the ESRW Equatorial Sailonline Round the World Race; equatorial to differentiate it from more traditional antarctical circumnavigations. Expect then to cross the equator frequently, although on this 3500nm first leg from Haifa to the Cape Verdes in Ker 40s you should probably stay north of it. Being a proper ocean race, there are no intermediate waypoints, but please try to leave Tangiers to port anyway.
Race #1427
INFO by brainaid.de
Ker 40 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: ESRW - SYC
RACE CLOSE: Thursday,
March 4 at 2300 UTC.
Race starts: Feb 05th 16:00 Registration Closed

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