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!

Board » Technical Support » Crossing the Finish Line

Posted by
Mouthansar


Users avatar

Posts
123
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


Users avatar

Posts
347
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


Users avatar

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:

Silverrudder 2025


Ahoy, SOLers! Get ready for the epic Silver Rudder – Challenge of the Sea! This 125nm single-handed race around Denmark’s island of Funen is back—shallow waters, narrow straits, and shifting winds await. This year, we trade up to our single-handed X-99s—can you master their power where precision counts most? It’s the world’s largest solo regatta, and your virtual helm is calling! Chart your course, trust your instincts, and race for glory in this ultimate test of seamanship!

It is imperative that you read AND understand these special Starting Conditions for SILVERRUDDER 2025:
Starting Conditions!!
Race #1948
INFO by brainaid.de
X-99 Single-handed PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: SYC
Race starts: Sep 19th 09:00 Registration Open!

▶ Flash
GO TO RACE

Rome to Tripoli 2025


The next race in the ARCH series will take us almost straight from Rome to Tripoli. But don't expect this 550nm race to be an easy one. The Mediterranean always offers some surprises. So let's prepare your Lagoon 55 with due care and... Fair Winds.
Race #1943
INFO from brainaid.de
Lagoon 55 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking:
ARQ3 - ARCH - SUPSOL – SYC
Race starts: Sep 15th 17:00 Registration Open!
▶ Flash
GO TO RACE

Carib Rum Run 2025

Welcome to the Caribbean and Sailonline’s legendary Carib Rum Run! This year we trade tall ships for pure speed as we race our sleek Santa Cruz 70s on a 1759nm slalom through the rum islands. Yer mission: plunder barrels from the region’s finest distilleries and deliver ‘em to the rum-thirsty sands of Cancun, Mexico. Finish on or before International Talk Like a Pirate Day, 19 September, to etch yer name in legend! Join SYC before race end and ye scallywags can disguise yer boat with a pirate name for this race only! Hoist the sails, sharpen yer cutlasses—the rum run awaits!
Race #1944
INFO by brainaid.de
Santa Cruz 70 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: SYC
Race starts: Sep 15th 00:00 Registration Open!
▶ Flash
GO TO RACE

Roslagen TIMED Sea Race

Welcome to quite possibly the most challenging TIMED race of the year. This month finds us in Sweden with lots of islands and narrow passages when we sail our Seacart 30 trimaran over the 86nm from Lidingö outside Stockholm to the beautiful coastal village of Öregrund. Consider yourself a winner if you complete the course nonstop! This is a TIMEDrace so you may RE-REGISTER HEREto 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 #1945
INFO by brainaid.de
Seacart 30 Particulars
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking:
TRQ3 - TRCH - SUPSOL - SYC
Race starts: Sep 07th 12:00 Registration Open!
▶ Flash
GO TO RACE

Great Nicobar to Marion Island 2025

The Adventure Continues – Leg #6 of the RWW Series.
We’re setting sail on the next stage of the RWW Series: a 4,400-nautical-mile passage from Great Nicobar to Marion Island. This demanding leg will test endurance, strategy, and seamanship at the highest level. As part of the 2025 Ocean Championship, this marks the ninth legendary challenge in the series — and one of the most exhilarating yet. The race will be contested aboard the Archer 78’ ketch, a vessel built to push sailors to their limits across the vast Indian Ocean.
PRIZE: SMPF
Race #1942
INFO by brainaid.de
Archer 78 PARTICULARS    
WX Updates:
0430 / 1030 / 1630 / 2230    
Ranking: OCQ3 - RWW - OCCH - SUPSOL - SYC
Race starts: Sep 01st 11:00 Registration Closed
▶ Flash
GO TO RACE

Go to race archive

SYC Ranking

  1. Sailonline Yacht Club Member vida
  2. Sailonline Yacht Club Member WRmirekd
  3. Sailonline Yacht Club Member CriticalHippo
  4. Sailonline Yacht Club Member rafa
  5. Sailonline Yacht Club Member KaSToR
  6. Sailonline Yacht Club Member Kipper1258
  7. Sailonline Yacht Club Member BRENTGRAY
  8. Sailonline Yacht Club Member Sax747
  9. Sailonline Yacht Club Member Panpyc
  10. Sailonline Yacht Club Member CollegeFund

View full list

Series

Mobile Client

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

The mobile client