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 » Technical Support » Crossing the Finish Line

Posted by Mouthansar Posts 122 Registered at 2009-12-25 22:49:08	2017-11-04 17:43:38 - Crossing the Finish Line
	Question: Is there a server-side algorithm that recalculates finishing time in case a boat is not at 100% perfection? Background: I rode shotgun with Wolff in the latest 40' Class race. At a critical and inopportune moment, just before the finish, he received an emergency call from his work. I made the last 2 - 3 course changes. Wolff finished 3rd as witnessed by the top bar and right column. Within moments he was 7th! Then, after another few moments 6th, which he was very happy with; but I am still astounded by the result changes.
Posted by kroppyer Posts 346 Registered at 2010-02-05 15:25:55	2017-11-04 23:02:21 - Re: Crossing the Finish Line
	Rankings of an individual race are calculated every minute or so. The DTF is updated more often. So it may be the case that the ranking updates and places boat A on #1 and B on #2, just before they finish. Then B overtakes A and they finish. The leaderboard will update DTF, showing #1: A, #2: B, both with DTF 0 (finished), and after a minute, maybe little more, they switch position to reflect that actual finish order. I'm not sure how to explain two changes after DTF has reaches 0, but the main idea is that the actual ordering/ranking of the leaderboard is lagging behind a little bit, which usually isn't a big deal, but when people are finishing close together, the leader board need a couple of minutes to settle.
Posted by outlaw Posts 33 Registered at 2012-06-01 13:37:55	2017-11-05 11:27:33 - Re: Crossing the Finish Line
	The short and correct answer is that only leaderboards on the frontpage matter... Ranking order is updated like every 5 minutes (?). DTF leaderboard and fleet positions every minute. Actual boat positions, as in observing your own boat, every 10s (nominal, may be closer to 11-12s, and somewhat random), or every 30s (precise, 30.00s) for 'inactives'. The key is that updates are sequential, no two boats have the same update time. Now imagine three boats that are very even, then their ranking is determined by who has the most time elapsed. Leaderboard shows A xx:01:09 B xx:01:07 C xx:01:01 Now update intervals are not precise, we get a roll-over B xx:05:09 C xx:05:03 A xx:05:01 B has not sent a command for 18 min and is switched to 'inactive' C xx:10:07 A xx:10:05 B xx:09:40 Next step we cross the line... C xx:10:07+2s A xx:10:05+4s B xx:09:40+29s Nobody gains anything.

Please login to post a reply.

Races

Next Race: 00d 00h 00m

Current Races:

Kapiti Chetwodes Race 2024

For only the second time in SOL history, we have the pleasure of inviting you to the Kapiti Chetwodes Race, held in the Cook Strait region. Organised IRL by the Royal Port Nicholson Yacht Club from Wellington in New Zealand. The approximately 160nm long route, full of turning points, will take us from the bay at RPNYC around the islands of Somes, Kapiti and Chetwodes and back to the finish line at RPNYC. We have only a 26 ft Albin 79 yacht at our disposal. All this means that we will have a lot of fun, so fair winds!
Race #1864
INFO by brainaid.de
Albin 79 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking:
ARQ4 - ARCH - SUPSOL - SYC
Race starts: Nov 25th 17:00 Registration will open soon

▶ Flash

GO TO RACE

Raja Muda Selangor 2024 - Penang to Langkawi

Welcome to the third and last online race of the Raja Muda Selangor International offshore series – a 70nm final trip further north again up the Malacca Strait from Penang to the exotic island of Langkawi, and again in Ker 40s.
Race #1871
INFO by brainaid.de
Ker 40 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: RMS - SYC
Race starts: Nov 21st 04:00 Registration Open!

▶ Flash

GO TO RACE

Raja Muda Selangor 2024 - Pangkor to Penang

Welcome to our second online offshore race in cooperation with Raja Muda Selangor International – an 80nm trip from Pangkor north to Penang up the Malacca Strait, again in Ker 40s.
Race #1870
INFO by brainaid.de
Ker 40 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: RMS - SYC
RACE CLOSE: Saturday,
November 23 at 2300 UTC.
Race starts: Nov 18th 04:00 Registration Open!

▶ Flash

GO TO RACE

Two Oceans Doublecross TIMED Race 2024

Our November Timed race takes us to Cape Town near where the Atlantic and Indian oceans meet. Our ride is a beautiful ketch, the Archer 78. Starting at Cape Town, we’ll round Robben Island, then head south to round Cape Point, up around Seal Island before heading north to round Dassen Island before returning to Cape Town. This is a TIMED race, so you may RE-REGISTER HERE to try again, after finishing a run. You will have 13 days and 11 hours to test your skill and decision making after the race opens.
Race #1872
INFO by brainaid.de
Archer 78 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking:
TRQ4 - TRCH - SUPSOL - SYC
RACE CLOSE: Saturday,
30 November at 23:00 UTC
Race starts: Nov 17th 12:00 Registration Open!

▶ Flash

GO TO RACE

Nassau to Bodo 2024

Prepare for the grand finale - the 6th and concluding leg of the RTW challenge, an odyssey from Nassau in the Caribbean to Bodø in Norway. Embracing a journey of 4000 nautical miles, this leg promises an exhilarating 18-day voyage. It also heralds the November installment of our prestigious Ocean Race Championship. Embark on a voyage of a lifetime, where prowess, tactics, and camaraderie unite in the pursuit of triumph. We eagerly await your presence at the starting line! May the winds be ever in your favor.
PRIZE: SMPF
Race# 1866
INFO from brainaid.de
Swan 65 PARTICULARS
WX updates:
0430 / 1030 / 1630 / 2230
Ranking: OCQ4 - OCCH - RTW - SUPSOL - SYC
Race starts: Nov 11th 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