Sailonline.org - Online Sailing

Facebook

Login

Support Sailonline

If you haven't already - join the SAILONLINE YACHT CLUB!

Please also consider making a donation - all amounts are greatly appreciated!

Tweets by @sailonline

Board » Flag Officers » Races » New York to San Francisco Record Attempt

Posted by NZL_Scotsman Posts 251 Registered at 2008-10-04 07:59:40	2013-03-27 04:08:20 - Re: New York to San Francisco Record Attempt
	You may have noticed that Gilles' DTG increased after passing the Cape Horn mark. This is due to the course between next mark and the finish. This issue has been discussed at length on chat before. The mark near the was to create a better race course. Unfortunately, this has resulted in the DTG calculation showing unusual results. This is likely to continue until the boats are near San Francisco. A more complete explanation and discussion is posted here. _______________ edited to make link out of url --- Last Edited by RainbowChaser at 2013-03-27 07:58:32 ---
Posted by NZL_Scotsman Posts 251 Registered at 2008-10-04 07:59:40	2013-03-27 05:17:42 - Re: New York to San Francisco Record Attempt
	Race Report Day 20 Our race leader Gilles has passed Cape Horn and is therefore past half way to the finish. Soldini took over 21.5 days to round the cape, so Gilles is two days ahead of the record pace after averaging about 14 kts since departing New York. From here it is “uphill” as we head north towards San Francisco. The South Atlantic was more straightforward than the North, but still had its challenges. The route taken by Gilles generally followed the rhumb line but locally required careful navigation through or around the weather systems crossing the mid-latitudes. These systems can behave unpredictably, which plays havoc with the best made plans. Gilles made a superb move three days ago when he decided to aim more directly for Cape Horn and even passed through the middle of the Falklands Islands. The fleet has spread out with over 160nm between first and tenth. The southernmost point of the Americas is also where the Atlantic meets the Pacific. As attention moves towards the Pacific the chasers will be looking for passing opportunities. Whilst Gilles’ lead is a strong one, he will still be looking over his stern to keep a close watch.
Posted by RainbowChaser Posts 2656 Registered at 2009-06-14 09:44:50	2013-03-27 08:16:07 - Re: New York to San Francisco Record Attempt
	Re DTF issue this is what I just said in race chat: RainbowChaser 7:54 morning all.. it IS possible to remove the waypoint at Pillar Point but if we do, your finish line will not sit across the bay but will be perpendicular to the rhumb line... and RainbowChaser 7:55 the position of the finish point, however, is needed for the record I understand so if you are all happy to have a skewed finish line then I can go ahead an remove Pillar Point (or Jeroen can) We have a long way to go so my view is to remove the Pillar Point mark and move on. What do you all think? ___________ --- Last Edited by RainbowChaser at 2013-03-27 09:10:43 ---
Posted by Svein Posts 84 Registered at 2009-05-04 15:09:20	2013-03-27 09:14:14 - Re: New York to San Francisco Record Attempt
	Well IMO, the direction of the finish line is basically a cosmetic issue (in a long race like this with longish intervals between finishes) and should not be considered, more importan is as relevant as possible pos#/dtf.
Posted by hmm Posts 118 Registered at 2011-11-03 13:35:22	2013-03-27 11:22:48 - Re: New York to San Francisco Record Attempt
	SOL uses great circle lines for the DTF calculation which can be tricky in long races like this. If you test drawing a GC line from Cape Horn to SFO you can see that the line actually curves like an S when it crosses equator which shows that it is difficult to anticipate on a flat map how the shortest distance goes in different situations. However the combination of a long leg, shallow turn and short leg (to finish) is not handled well by the method SOL uses for calculation so in my opinion removing the Pillar Point waypoint would be the best fix for this issue. In racing point of view, the issue is actually cosmetical as the distances sailed by the boats are still the same. The problem is in the way SOL tries to anticipate the point where boats will round the Pillar point.
Posted by WIN Posts 335 Registered at 2009-07-09 23:32:07	2013-03-27 11:24:02 - Re: New York to San Francisco Record Attempt
	Ciao ALL my friends although I am not in this race , I would like to make a couple of contributions , being the DTF , and the race course quality check two subjects that apply to all races specially Ocean. 1) The DTF mechanicals in SOL are at present the best we can have , but we know they are far from being realistic when thinking IRL sail racing. We all know that rankings in SOL are valid only if all boats are on one reaching line and close enough to the finish ( LOL ) .......SO : YES !! RC ...please remove that mark that furtherly and dramatically deteriorates the realism !....Perhaps in a not too distant future we can study better ways .....now let's play with what we have got at best . 2) The pre race quality check is very important and is responsibility of each and everyone of us , specially the Mavericks of the SOL mechnaicals. Some has pointed fingers at Admins for the snag ..... IMO admins only have to be praised for keeping SOL alive , and I would love to see this firmly in our minds . BTW ...I am NOT a maverick of the behind the scenes in SOL ....I do NOT understand the effect of that WP on the DTF ( LOL ) ....thus I was not able to spot the problem , but there is a number of Solers who DO ....it would be great if they could help the admins in quality checks. Till soon ) Piero (WIN)
Posted by A2 Posts 347 Registered at 2009-10-26 00:39:42	2013-03-27 13:34:25 - Re: New York to San Francisco Record Attempt
	For Markku Hänninen: I certainly will defer to your familiarity with the nitty gritty of the way things work in this matter, however I was under the impression that the DTF calc used the Rhumbline distance as boats in shorter races are often placed higher who stick close to the redline None so blind
Posted by javakeda Posts 73 Registered at 2013-03-01 03:18:22	2013-03-28 07:44:11 - Re: New York to San Francisco Record Attempt
	It seems clear that, as long as we have marks to be left to port or starboard [as opposed to marks that must be sailed to], rankings in intermediate legs are problematic. As a prior poster suggested, how wide a skipper leaves a mark is a tactical decision. Proximity to a mark does not necessarily translate to an advantage. With that background, here are some off-the-wall thoughts on 'classification': 1) Basic classification should be based on a combination of marks rounded and GC-[sail to] distance to the next mark. There should be no way that a boat that has rounded a mark [e.g. Cape Horn] is classified below a boat that has yet to round that mark. 2) The lat/lon of all boats should be published by SOL in conjunction with the Wx. This corresponds to the "check-in" requirements of many real-life races -- although most races do not require check-in every six hours.. 3) We should develop additional share-ware tools to help all skippers analyze their tactical position vis-a-vis other boats. [I would gladly share any analytical spreadsheets I might develop.] All of this is based on the thought that 'rankings' in a ocean race are somewhat subjective. Rather than striving for a 'perfect' objective function, I suggest we embrace the subjectivity ... and the ambiguity that implies.
Posted by dikkehenk Posts 65 Registered at 2012-02-24 15:03:37	2013-03-29 10:47:46 - Re: New York to San Francisco Record Attempt
	on request, here is the polar for QT.. have fun --- Last Edited by DIKKEHENK at 2013-03-29 10:48:29 --- Attachments boat_sm100.csv (1.2 KB)
Posted by Eddie C. Dost Posts 57 Registered at 2008-08-23 11:40:29	2013-03-30 13:30:59 - Re: New York to San Francisco Record Attempt
	I have added QtVlm polar downloads to my sailonline toolbox, please test and tell me whether this works with QtVlm. If the downloaded files are good for QtVlm, please spread the word to others. Thanks! Cheers, Eddie P.S. The toolbox is at http://sol.brainaid.de/sailonline/toolbox --- Last Edited by Eddie C. Dost at 2013-03-30 13:31:49 --- _/)_/)_/) The sea is lovely, dark, and deep, But I have promises to keep, And miles to sail before I sleep, And miles to sail before I sleep.

Page: Previous 1 2 3 Next

Please login to post a reply.

Races

Next Race: 00d 00h 00m

Current Races:

Kamchatsky to Tromsoe 2024

Just before the light failed entirely in Antarctica, Skip Novak managed to get his Pelagic 77 out of the ice and north up the Pacific to Kamchatsky. The sun is shining (24/7) and not a penguin to be seen, and Skip believes the Norh East Passage is ice-free (sufficiently) to attempt it, so all aboard for a c 4250nm voyage from east to west across the top of Siberia, Russia and Norway to Tromsoe!
Race #1779
INFOby brainaid.de
Pelagic 77 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: HLAT - SYC
Race starts: Jul 18th 19:00 Registration Open!

▶ Flash

GO TO RACE

Cowes to St Malo TIMED Race 2024

Organized by the Royal Ocean Racing Club since 1929, the Cowes to St Malo Race is a true RORC Classic. Starting from the Royal Yacht Squadron Line, Cowes, IOW, a magnificent spectacle can be watched from The Parade, Cowes. The Cowes to St Malo Race is part of the RORC Season’s Points Championship, the world’s largest offshore racing series. Dating back to 1906, the Cowes to St Malo Race precedes all of the world’s famous races including the Fastnet Race. This is a TIMEDrace, so you may RE-REGISTER HERE to try again, after finishing a run. You will have 13 days and 11 hours to show your skill and decision making after the race opens.
Race #1828
INFOby brainaid.de
TP-52 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking:
TRQ3 - TRCH - SUPSOL - SYC
RACE CLOSE: Saturday,
27 July at 23:00 UTC
Race starts: Jul 14th 12:00 Registration Open!

▶ Flash

GO TO RACE

Lake Ontario 300 Challenge 2024

Lake Ontario Offshore Racing (LOOR) welcomes Sailonline to a second race of their annual series, this time as hosts of the virtual LO300. As the name implies, the LO300 is a 300nm offshore race across the length and breadth of Lake Ontario, from and back to Port Credit YC. Once again, as is our wont on Lake Ontario, a fleet of Beneteau First 36.7s is being made available to virtual racers. There is an overall prize for the SOLer who best bosses Lake Ontario over the two races hosted on SOL, this 300 and the Susan Hood raced back in May; so let the competition be fierce!
Race #1805
INFOby brainaid.de
First 36.7 PARTICULARS
NAM_AWIP WX Updates:
0245 / 0845 / 1445 / 2045
Ranking: LOOR - SYC
Race starts: Jul 13th 15:10 Registration Open!

▶ Flash

GO TO RACE

SSANZ Triple Series 2024 - Race 1

Welcome once again to our online buddied Short-handed Sailing Association of New Zealand brilliant long-standing SSANZ Triple Series for two-handed yachts on the waters of the Hauraki Gulf, sponsored this year by Lewmar Marine. Commencing with a c 46nm quick dash out to Motuora Island via The Haystack and home, we will as always compete in virtual Young88s, against the real-life fleet of the members of the ever-Young 88 Association!!
Race #1823
INFO by brainaid.de
Young 88 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: SSANZ - SYC
Race starts: Jul 12th 21:15 Registration Closed

▶ Flash

GO TO RACE

Tall Ships Races 2024 - Tallinn to Turku

Welcome to the second of three virtual Tall Ships Races on the Baltic Sea which are concurrently being organized in-real-life Sail Training International . This second race is from Tallinn, Estonia to Turku, Finland; circa 150nm in Sailonline’s stately Full Rigger.
NOTE: Starts and Finishes in tall ships racing are always offshore to avoid conflict with shipping and shipping lanes.
Race #1812
INFO by brainaid.de
Full Rigger PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: TS - SYC
RACE CLOSE: Friday,
July 19 at 2300 UTC.
Race starts: Jul 11th 14:00 Registration Closed

▶ Flash

GO TO RACE

Southampton to Punta del Este 2024

Sailonline is delighted to offer our sailors a 'reversed' Atlantic ocean race. As the RTW championship Atlantic part takes a detour to the Bahamas, we will offer you a reversed course as we will not do the 'usual' leg this year either. It is the July edition of this year's Ocean Championship. Our boat is the OD_65v3.
PRIZE: SMPF
Race# 1820
INFO from brainaid.de
OD65 PARTICULARS
WX updates:
0430 / 1030 / 1630 / 2230
Ranking: OCQ3 - OCCH - SUPSOL - SYC
Race starts: Jul 01st 11:00 Registration Closed

▶ Flash

GO TO RACE

Go to race archive

SYC Ranking

View full list

Series

Mobile Client

SYC members have the benefit of access to our mobile/lightweight web client!

The mobile client