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Profile for ita10267



Name ita10267
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Posts88
  • R.I.P. J24Opla
    Board » General Discussion
    Yesterday we received the sad news that Claudio (aka J24Opla) sadly passed away.
    Claudio was a great sailor, mostly appreciated in the lakes Maggiore and Garda and also a very active member of SOL community. Unfortunately he became very ill and COVID was not nice to him.

    May he rest in peace and sail away in smooth sea.

    Andrea (aka ita10267)
  • Re: RIP psail - Joao Malafaia
    Board » In memoriam
    Still shocked by the terrible news! Had quite a few professional chat with Joao and I will remember him for is clear and concise way of thinking. Like to remember him sailing, IRL or virtually, with the same spirit!

    ciao
  • Re: RTW start
    Board » Sailonline Race Committee » Races
    will you?
  • Re: RTW start
    Board » Sailonline Race Committee » Races
    Well Done! It was the right decision to make. One of the reason SWR is the main event of SOL year is that we really get to test ourselves against the top navigators. And with 18 hours of headstart (and a totally different wx configuration) it would have been a pity to race this one on our own.

    Thanks to the SRC and management for the reaction in such a short time!
  • Re: RTW start
    Board » Sailonline Race Committee » Races
    It appears that we are starting despite the new postponement of the IRL race. I am in total disagreement with this decision as it makes incomprehensible the first postponement. Hope that the SRC can reconsider and delay the start accordingly.
  • Re: The Weather Research & Forecasting Model (WRF)
    Board » Technical Discussion
    In synoptic conditions, i.e. wind given by large pressure systems, forecast are simpler and more reliable (see the Bos-New race with the heavy storm). In fluky conditions, with basically no pressure gradient, wind is given by "local"effect such as cloud coverage etc. So yes, on mesoscale, weather is less "consistent".

    As a comparison, GFS is "averaged" over a much bigger gridsize, so all the small scale variation are zeroed and you ave a more stable but less interesting windfield. On the other hand NAM model, on a 0.1deg scale, has the same behaviour.
  • Re: The Weather Research & Forecasting Model (WRF)
    Board » Technical Discussion
    JB,
    at present time we have to allow for some WX data outside the race course (the purple line). This to allow predictor to work properly in the client. In this race we have used 0.5deg from each side. In the end we had more than 30% of datapoints "useless" for the race. In an optimal condition (no points outside race area), wxfile should have been around 4MB, which travels compressed now, so perfectly usable for the "desktop" client.
    Regarding mobile, probably it has some problems (depending on hardware) regarding memory and cache. Probably Zappe can look into that.
    Finally, the WRF is defined every hour, so dataset is 3X for the same resolution compared to GFS. As outlaw commented, we should push for even higher time resolution (1 frame every 15min). In this case probably we'll have denser frames for the first 6hrs and sparser afterwards.
    Ciao
    a.
  • Re: The Weather Research & Forecasting Model (WRF)
    Board » Technical Discussion
    forecast for sunday morning
  • Re: The Weather Research & Forecasting Model (WRF)
    Board » Technical Discussion
    A small video on high resolution weather

    http://youtu.be/n5ThrmvMJxA
  • Re: The Weather Research & Forecasting Model (WRF)
    Board » Technical Discussion
    so, you are referring to the grid discretization.
    In SOL this changes from race to race. Usually we start from 0.5x0.5 deg GRIB file from NOAA which is then interpolated to the grid of our interest. In Leg4, for the first time, we are running the ocean on a 1x1 deg grid. The "pointy" edges are caused by the interpolation algorithm (bilinear), which is the same we use to get wind in between grid points.
    The WRF model we are using in the BOS-NEW race is evaluated on a much denser grid. This is not an interpolation process but a complete physical evaluation. The 0.5degx0.5deg GRIBS from NOAA are taken as boundary and starting conditions then the calculations are done on a powerful computer. The result is a 0.05X0.05 deg GRIB.

Races

Next Race: 00d 00h 00m


Current Races:

Melbourne to Osaka 2023
Welcome to Melbourne for Sailonline's alternative version of the Melbourne to Osaka Double Handed Yacht Race - a 5000 nautical miler. This year again we're racing the RP-66, but the route is unlimited what comes to waypoints. Because the IRL version does not run this year, we took the freedom to make our own route!
It could be a long race, east or west, and of course some doldrums to negotiate!
PRIZE: SMPF
Race #1679
INFO by brainaid.de
RP-66 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking:
OCQ2 - OCCH - SUPSOL - SYC
Race starts: Apr 01st 02:00 Registration Open!

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Sail Around Turkey 2023

This is one of Sailonline's iconic and more challenging races. Our IMOCA 60 Foil high-speed yachts will sail across three seas (Black Sea, Sea of Marmara, Mediterranean Sea) and two beautiful straits (Strait of Istanbul - Bosphorus and Strait of Canakkale - Dardanelles). Altogether 1372 nm of great and demanding sailing from Hopa (the easternmost point of the Turkish Black Sea coast) to Iskenderun (the easternmost point of Turkey's Mediterranean coast). Get ready for a lot of fun; we are waiting for you at the starting line.
Race #1665
INFO by brainaid.de
IMOCA 60 Foil PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking:
ARQ1 - ARCH - SUPSOL - SYC
Race starts: Mar 21st 15:00 Registration Closed

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Sinbad Seeks Spices 2023
Having surveyed Arabia, Sinbad Al-SOL’er next invites you to race him on his second of seven epic voyages to every corner of the Indian Ocean and beyond, this time to seek spices in Zanzibar, departing from Xaafun, a trading post on the tip of the Horn of Africa since the days of the Mycenaeans and on through Roman times to the Nights of 1,001 of AL-Sail’or, Al-SOL’er’s illustrious ancestor. SOLing by the sun and the stars, aka seat-of-the-pants, the voyage will take you east as far as Praslin island, south as far as Anjouan, to Zanzibar’s Unguja for all things spices, but only back as far as Mogidishu – another exhausting 3000nm adventure, this time in Reichel/Pugh 66s.
Race #1637
INFOby brainaid.de
Reichel/Pugh 66 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: SYC - SVS
Race starts: Mar 19th 09:00 Registration Closed

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