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Profile for ij



Name ij
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Posts30
  • Re: Colour of boat track and size of the time marker
    Board » Technical Support
    While I don't fully follow what you refer with what, the predictor color could be changed through settings. In my own terminology "track" would refer past track and "predictor" refers to predicted future positions.

    The problem kind of sounds like you had something to occur for your DC-aware predictor. If it is enabled, COG & TWA predictors are dull colored and only the DC-aware predictor should be the bright one. The DC-aware predictor can visually seem "disappear" e.g. when you add TWA=0 DC (because the boat remains stationary from that point on). It's kind of counterintuitive. ...I can imagine this condition occuring e.g. when nearing PR's finish line. Is it relevant to your case?

    A bug in the predictor calculation is of course also possible but without screenshot or some other evidence it's a bit hard to fathom the cause.

    Another unintuitive DC-aware predictor trap occurs when one has DCs in future and BBQes. The bright track will keep showing the course after the next DC so there might be no visual change in the bright predictor that would alert to the problem.

    --
    i.
  • Re: Congrats WRmirek on scoring a perfect 10
    Board » General Discussion
  • Subdomain usage/usecases
    Board » General Discussion
    Hi all.

    Is anyone using the "subdomain" feature such as race1.sailonline.org in different browser tabs/windows? Could you please tell me what's your usecase if you're using them?

    I might need to put some restrictions on them in the near future but I'd like to preserve useful use-cases with a set of non-wildcard subdomains, if they're being used by some.

    Thanks in advance.

    --
    i.
  • Re: Suggestions to extended predictor
    Board » General Discussion
    Hi,

    I've wanted to have the very same feature myself so it should eventually appear. In addition to many others such as aiming from predictor, estimating manouver performance effect, etc.

    --
    i.
  • Re: Legality of the use of extra zoom on the apparent size of end points of finish line
    Board » Sailonline Race Committee » Rules and Decisions
    All marks and finish line endpoints are singular coordinates on server side. That is, the server thinks their diameter is zero.

    However, I don't believe those "closest" pixels are really necessary in practice anyway as we talk very very small distances per pixel. I'd recommend leaving at least 0.002 degree margin in angle to be on the safe side (it's easy to check that the COG number in the infobox changes when aiming).

    The finish line endpoints are not provided by the server currently but they are calculated by the client(s), which is a potential (small) error source on their position. There was an unfortunate incident not so long ago related to it because html5 client finish line code pre-dated my access to server-side formulas. I'd like to change this among many other things eventually such that the finish line coordinates are provided by the server so such errors would no longer be possible.

    Occasionally pixel rounding related "jitter" may result in different positioning for the very same line so "crossing" is not even well-defined if only considered what is seen visually for a line.

    --
    i.
  • Re: Public testing new HTML5 client
    Board » General Discussion
    Hi all,

    I've just updated the dev version with lots of changes. It is possible to enable DC-aware predictor already, however, there are a few caveats. The DC-aware predictor does not consider performance losses at turns correctly. Initial performance is consider correctly like previously, however, when firing any DC, the performance gets beamed up to 100% and remains there for the remaining predictor length. In addition, the calculation only runs with 30s accuracy wrt. boat movement.

    There is now BBQ warning sound and a few new ruler related buttons that were requested.

    Some changes are (should be) user invisible library updates but they might introduce new problems (or bring back vanishing fleet problem which has caused me to hold back one particular library update).

    --
    i.
  • Client Buttons Changed
    Board » General Discussion
    Hi all,

    I've now altered the "GO TO RACE" button so that it leads to HTML5 client (and race registration link likewise leads to HTML5 client).

    If you still want to access the old flash client, a smaller button above it that used to point to HTML5 client is left for your convinience. However, with the demise of Flash support in Web browsers imminent, I'd strongly recommend contacting me if you have strong reasons why you cannot use HTML5 client but need to keep using Flash client so I can see if I can somehow help the situation.

    Happy SOLing.

    --
    i.
  • Re: Public testing new HTML5 client
    Board » General Discussion
    Stable version of the client was updated today (2020-10-05). Long list of changes:

    - Longer predictor (up to 48h, see settings)
    - Relocate weather navigation buttons next to each other
    - Month is now textual in date instrument to avoid interpretation ambiguities
    - Thicker line for the downwind (when wind cursor lines are in use)
    - Improved visibility of some text fields on map (to avoid unreadable mess when TWS/TWD values are enabled)
    - 10m x 10m box to show scale when using extra zoom (can be disabled in settings)

    - Improve ranking tab sort order, sort secondarily based on ranking
    - Ranking tab includes DBL column for fleet races (please don't report those minor inconsistencies in the numbers, it's not a bug in the client)
    - Added "race boundary" labels to help newcomers
    - Use white text for instruments in night/dark mode
    - Remove duplicated labels when the same mark is used more than once for the race course
    - Limit TWS contours density with far-away zoom levels to improve performance


    - Coordinate instruments obey the coordinate format in settings
    - Prevents another fleet boat from showing up as own fleet boat
    - Fix boat key (boat label on map) wrap issues
    - Various clock synchronization improvements that are triggered if local clock is off by more than 2 minutes from the time on the server
  • Re: Weather - Brain Storm
    Board » General Discussion
    There's no differentiation for non-profits. The ECMWF licensing is using the very same conditions for non-profits and commercial. From https://www.ecmwf.int/en/forecasts/accessing-forecasts/licences-available:

    "Provide a service using real-time ECMWF products

    If you wish to provide a commercial, non-commercial, or not-for-profit service to third parties using ECMWF real-time products, you will need to accept the terms of the ECMWF Standard licence and pay for the associated data and handling costs."

    I don't see any way around paying, regardless of non-for-profit or not (research, as expected, doesn't allow providing any services and it would be really twisting the rules anyway).

    If a "secret" wx is desired, it's relatively easy to create one with WRF, just some parameter tweaks that remain secret are required. But then we will find out the WRF is volatile enough in itself so the secrecy loses its useful/meaning (one cannot plan long-term route with wrf even nearly as reliably as with gfs).

    A "secret" wx would really just force people to sit in front of computer whole the time, especially in low TWS conditions, because twa steering becames a joke for racing purposes (or not to participate at all which is hardly useful goal to aim at ;-)). ...It gave me another idea though, maybe the platform should allow truly crewing the same boat with different usernames to share watches (different from private boat sharing that is of course possible even today). Then it would be a bit less solo mission to keep an eye on the wx.

    --
    i.

    --- Last Edited by ij at 2020-09-29 19:48:35 ---
  • Re: Weather - Brain Storm
    Board » General Discussion
    Of the available forecasts, these regional ones certainly seem interesting for higher than GFS precision:
    - ICON-EU
    - AROME
    - NAM conus & maybe caribbean nests

    For global models, I don't think there are freely available alternatives with enough incentives to make it worth replacing GFS, and many have clear disincentives such as non-even forecast lengths for different times.

    Without at least seriously trying out with GFS 0.25 x 0.25 first, I wouldn't spend too much effort on the other global models that are freely available. (ECMWF is not freely available, if it would be, it would certainly seem attractive enough).

    In practice, the blocker for any high-res wx is the lack of tiled wx support which requires too large modifications before some other blockers are removed first so it's not going happen over a weekend (I've definitely made some progress towards that direction but it's a big task with rather limited help so far). Even the WRF weathers which we've not been able to use for some time were somewhat big data sizewise for anything else than those small sprints (but certainly made the races much more interesting, IMHO).

    --
    i.

Races

Next Race: 00d 00h 00m


Current Races:

Gulf Run 2021
It is 550nm on a course of 175 true from Dingle to Vigo, and from Pensacola to Yucatan as well, across the Gulf Stream and The Gulf respectively. It's warmer down in The Gulf, so we return to its azure waters for a re-run in J-130s of a course designed by RainbowChaser back in 2012, but only first run in 2018. Bring your deck chairs and the barrier cream.
Race #1513
INFO by brainaid.de
J-130 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: SYC
Race starts: Oct 26th 21:00 Registration will open soon

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Isla del Sol Re-Run 2021
Scanning the globe for special sprint locations, our intrepid course designer Renegade came across Isla del Sol in the middle of the world's highest navigable body of water, Lake Titicaca. We tried to race around it last month, but at 3812m above sea level, comms to our boats broke down for a little while, and our SRC decided to abandon the race, so we are running it again: 26nm RTI in "how-did-we-get-them-here?" Fox 9.50s.
Race #1512
INFO by brainaid.de
Fox 9.50 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking:
SPRQ4 - SPRCH - SUPSOL - SYC
Race starts: Oct 23rd 16:00 Registration Open!

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China Coastal Race 2021


Racing in reality around the world is tough during a global pandemic and RHKYC's calendar is having to be flexible too so instead of a run to Vietnam, welcome to a competitive coastal race inside Hong Kong waters - 97nm in TP52s against the local fleet!
Race #1519
INFOby brainaid.de
TP52 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: SYC
Race starts: Oct 23rd 03:00 Registration Open!
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Virtual PIC Coastal Classic Yacht Race 2021


Welcome! Kia Ora! to Auckland, New Zealand, and Sailonline's annual multihull race against the NZ Multihull Yacht Club competitors over 118nm from Auckland to Russell. Sadly, COVID19 restrictions mean the real race will not be running, but we welcome real racers to our virtual event where we are racing our 60ft trimarans in this testing event in the endlessly varying conditions off the east coast of North island. As is tradition, a hearty breakfast of bacon butties and rum will welcome yachties on their arrival.
Race #1515
INFO by brainaid.de
60ft trimaran PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: SYC
Race starts: Oct 21st 21:00 Registration Open!
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ESRW6 Singapore to Kuwait 2021
Join us as we embark on our final leg(6) of the fabulous ESRW round the equator race series, this time onboard the speedy 90 foot Monohull as we wind our way out of the Malacca Strait and across the Indian Ocean 3000nm to Kuwait. It'll be steamy all the way!
PRIZE: SMPF
Race #1508
INFOby brainaid.de
90 foot Monohull PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: ESRW-OCQ4-OCCH-SUPERSOL-SYC
RACE CLOSE: Tuesday,
October 26 at 2300 UTC.
Race starts: Oct 01st 03:00 Registration Closed

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SYC Ranking

  1. Sailonline Yacht Club Member WRmirekd
  2. Sailonline Yacht Club Member rafa
  3. Sailonline Yacht Club Member bonknhoot
  4. Sailonline Yacht Club Member Sax747
  5. Sailonline Yacht Club Member FreyjaUSA
  6. Sailonline Yacht Club Member GREATSKUA
  7. Sailonline Yacht Club Member Cippalippa
  8. Sailonline Yacht Club Member Dingo
  9. Sailonline Yacht Club Member Kipper1258
  10. Sailonline Yacht Club Member Mediterranean

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