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Profile for JB



Name JB
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Sail Fair.
  • 2018 SYC rankings
    Board » Sailonline Yacht Club
    Good afternoon all.

    Probably I'm missing sometning but, I don't understand why my first seven 2018 40' Series results were discarded from my SYC results.

    Thank you.

    João/psail
    Sail Fair.
  • 40’ Series hiatus.
    Board » Sailonline Race Committee » Races
    Good morning all.

    I’ve read the SRC annual report about the 40’ Series and it’s sad to know this SOL championship won’t turn in 2019.
    I understand and also agree with SRC exposed arguments. Pity that a phew conditioned the remaining majority.

    One possible way for overcoming the main issue, if not, the only one - the boats overuse/abuse from some skippers - is to make the Series races with pre-fixed boats for all, turning the Series to a OD championship with #4 - #5 40 footers to be used.
    But you loose part of the game.

    Other suggestion, independently of the Series future format (OD or multiple choices), is to upgrade the Series with faster boats, instead of “artificially” downgrading the faster ones (notice: one was already available in the SOL marina for the 2018 Series).

    From my part I’ve trying since a while to bring the Melges 40 Polar but till now without success.
    So, if anyone out there can give an hand on this I’ll be very thankful.

    Thank you.

    João/psail
    Sail Fair.
  • Re: qtVlm thread
    Board » Technical Support
    Hi Philippe and all.
    Good afternoon.

    Well, the settings I’ve been using a long time (since they were available) are the same, so I don’t have any induced distortion on comparing results generated with different settings.

    Those settings have proved to give results in all kind of WFs and with different boat Polars, being also more relevant with the faster boats, as you easily understand and as per example I sent you recently.

    Correct, the lower the Time Step (TS) used for calculating the Isochrones, the bigger will be number of potential WPTs. That’s the price for getting precision.

    The first point you mention misses rationality.
    We all know that ANY GRIB file won’t be exactly what you are going to sail IRL. Under that argument - yours - I ask why do we make routings?

    I totally agree with your second point and part of the third. For that I can give you one plausible answer for people not using TS = 5 minutes: I takes a lot of time to get a result, not because is less precise.

    In relation to fourth point, previously I gave you a suggestion: bring back the old "cutter", which I now reiterate.

    If it doesn’t have anything to do with the used TS, what’s the problem for implementing it again?

    My Dear Friend have also
    a Merry Xmas

    João/psail
    Sail Fair.
  • Re: qtVlm thread
    Board » Technical Support
    In past years we saw a quick evolution not only on weather routing software but also on sidekicks aiding tools.
    One of the best weather routing programs used around the corner is qTVlm. Since the very first versions it has been upgraded in a good rhythm bringing also a plethora of innovations, sometimes using info and suggestions gathered from the community.

    Anyhow, one qT aspect that has been roller coasting is the Optimizing/Simplifying algorithm processes applied to the calculated routing WPTs.

    It is very simple to verify that in spite of using the “Optimum Simplify” process first, and "Optimize" after (applied only once or several times), normally we won’t get the best ETA - even before any trimming operation on the fixed calculated WPTs, the ones in “red” color generated around land/rocks/barriers and on the remaining "green" movable ones.

    The cause for this is identified. Is a direct consequence of the used decimating algorithm implemented in qT for the “Simplify”/ “Optimum” processes.

    In recent versions - 2018 - this issue was aggravated as the decimating operation during the “Simplify” process stopped being uniformly applied along the routed path, leaving us to the somehow paradox of having more remaining WPTs in the end of the route, precisely where the predictability of the WFs are worse, which is a contra sense.

    There are ways to overcome this issue but, again with another contra sense, as you have to spend more time rehabilitating an over decimated routed path by adding new WPTs.

    Every WPT over decimated is a less one degree of freedom in the generated curve, giving here the main reason for qT going in opposite direction of the optimum ETA.

    Sincerely hope that qT responsible persons take once for all this issue and, at least bring back the “old” decimating algorithm, the uniform “cutter”.

    João/psail
    Sail Fair.
  • Re: GGR race final position.
    Board » Sailonline Race Committee
    Good morning SRC and all,

    Thank you for your reply &
    Merry Xmas.

    João/psail

    Sail Fair.
  • GGR race final position.
    Board » Sailonline Race Committee
    Dear SRC and all,

    Good night.

    Only now saw the final leaderboard for this race and, as expected I've suffered a time penalty accordingly to the race rules.

    In fact, I've departed from Hobart before time - didn't respect the 90 minutes stopover. It's a fact.

    Anyhow, if you look to the attached pictures you'll understand better what happened and following actions from psail.

    After recognizing my mistake I immediately imposed a self-penalty, stopping the boat for more than 90 minutes.

    So the late SRC action doubles the previous token on due time, i.e., the self imposed penalty psail made.

    For the mentioned reasons I kindly ask SRC to review psail final race position.

    Thank you SRC.

    João/psail



    Sail Fair.
  • Re: qtVlm thread
    Board » Technical Support
    No such problem here, what version are you using on which platform?

    @João/psail what other problems ?
    Replied today to Philippe.
    Latter I'll give further details.

    João/psail
    Sail Fair.
  • Re: qtVlm thread
    Board » Technical Support
    Hi all.

    Andrew, if memory doesn't fail, the related problem came on the qT 5.8.2 version, hence the main reason for stop upgrading qT since 5.8.1 (there are other reasons).

    João/psail
    Sail Fair.
  • Cookson 50 Polar data
    Board » Technical Discussion
    Hi all.

    Some time without coming here.

    Let’s see if the SOL community can bring some help on this subject.
    Please, I need a Cookson 50 Polar.

    The ones (#4) published on the link:

    http://jieter.github.io/orc-data/site/

    are limited as they stop at TWS = 20 Kts.

    The other reference I’ve found to the Cookson 50 Polar was on

    https://www.duo.uio.no/bitstream/handle/10852/12589/master_nils.pdf?sequence=1

    but has a poor graphic representation.

    So, if you have or know a location where I can extract one, pls give info.

    Thank you.

    João/psail
    Sail Fair.
  • Re: qtVlm thread
    Board » Technical Support
    Viva Philippe

    Good morning.

    Thank you for info.
    Yes, it works as the former "B" command.

    Big Hug
    João/psail
    Sail Fair.

Races

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A-OI!!! Winter storms may be hurtling across the Shetland Islands but nothing will stop preparations for this year's season of firey festivals. As is our tradition, Sailonline will be racing to Lerwick to (virtually) take part in the Up Helly Aa festivities there which take place this year on Tuesday, 29 January. SAILING NOTE: Gruney may be approached from any direction but must be passed for rounding purposes as indicated on the chart.
Race #1213
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Elan 410 Particulars
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Florida Rum Run 2019
Welcome to sunny Florida, USA, and a 400nm race in Ker 40s from St. Lucie inlet to Paradise Island Bahamas and back to Jupiter Inlet, Florida. This regatta is loosely based on the course of the 2010 Nassau Cup.
Race #1210
INFO from brainaid.de
Ker 40 Particulars
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0245 / 0845 / 1445 / 2045
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Race starts: Jan 22nd 18:00 Registration Open!
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Sea Lion TIMED Race 2019
Come on down South for long days of sunlight and strong bracing winds to race our speedy little Seacart 30 as many times as you like - 117nm as the albatross flies - through some of the islands of the Falklands archipelago. As this is a TIMEDchallenge, let's see who can get the best time!!
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Race #1212
INFO by brainaid.de
Seacart 30 Particulars
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking:
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ALT. CLIENT: Classic
RACE CLOSE: 26 January at 2300utc
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Golden Globe Race 2018 - Leg 2 Storm Bay to Les-Sables d'Olonne
Welcome to Leg 2 of Sailonline's virtual version of the 2018 Golden Globe Race. After a brief respite in Storm Bay, Tasmania, of a minimum of 90 minutes after arrival, we are now racing across the Pacific, round Cape Horn and home to Les-Sables d'Olonne.
DO NOT START TOO EARLY
If you raced Leg 1 then you MUST wait 90 minutes before starting this leg. The penalty for starting Leg 2 before finishing Leg 1 is NO RANKING. The penalty for starting Leg 2 within 90 minutes of finishing Leg 1 is 5x the time you started too early.
Race #1181
INFO by brainaid.de
Rustler 36 PARTICULARS
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Race starts: Sep 15th 12:00 Registration Open!
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Golden Globe Race - Leg 1 to Storm Bay
Welcome, all, to the 2018 Golden Globe Race and Sailonline’s virtual version of this iconic 50th anniversary rerun of 1968’s first ever non-stop single-handed round-the-world race in yachts and with technology in keeping with that historic time.
To reflect the challenge being undertaken by the real racers, as announced previously, SOL invites all who feel so inclined to add their boat name to the post in FORUM declaring you will race by the proverbial "Seat Of The Pants" (SOTP) with no outside assistance from routing software or other external aids, BEFORE THE STARTING GUN IS FIRED.
To simulate the real race which features a 90 minute minimum stopover in Storm Bay, SOL’s online version has been divided into two legs. This first leg then is from Les Sables-d’Olonne to Storm Bay. When the leaders approach Storm Bay, Leg 2 from thence back to Les Sables via Cape Horn, will open. YOU MAY NOT START LEG 2 UNTIL AT LEAST 90 MINUTES AFTER FINISHING LEG 1. The penalty for starting Leg 2 before finishing Leg 1 is NO RANKING. The penalty for starting Leg 2 within 90 minutes of finishing Leg 1 is 5x the time you started too early.
DO NOT START TOO EARLY!
Fair winds and good luck!!
Race #1154
INFO by brainaid.de
Rustler 36 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: GGR
ALT. CLIENT:Classic
Race starts: Jul 01st 10:00 Registration Closed
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