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 » General Discussion » Velocity made to course

Page: 1 2 3 Next

Posted by
Adam


Users avatar

Posts
5
Registered at
2009-01-11 16:55:10
2009-01-22 05:23:40 - Velocity made to course
Is it possible to add this indicator ? Plus miles lost or gained in lets say last 3 hours to the leader ? And mark on the polars the optimum upwind/ downwind angles to VMG ?
Posted by
jakob


Users avatar

Posts
364
Registered at
2007-09-04 10:05:30
2009-01-22 07:59:59 - Re: Velocity made to course
Thanks for the suggestion. I will put it on the list but I cannot promise anything soon.
...one of the guys behind the game...
Posted by
Jeroen


Users avatar

Posts
245
Registered at
2007-08-15 09:17:47
2009-01-23 14:02:03 - Re: Velocity made to course
We are working on some additional race information.

In the mean time you can find a lot of race info here: http://stenum.se/sailonline/
I am a ex-admin of SOL who joins in from time to time.
Posted by
Impromptu38


Users avatar

Posts
8
Registered at
2009-01-04 22:30:14
2009-01-23 19:40:08 - Re: Velocity made to course
Joeron:

The experimental information is just fantastic: Great Work

I will overload my thinking, but I like haveing that information at hand.

Thanks, Ron Casciato, Impromptu38
Posted by
AGage


Users avatar

Posts
411
Registered at
2008-12-27 10:31:57
2009-01-25 16:26:56 - Re: Velocity made to course
a6km said @ 2009-01-22 05:23:40:
Is it possible to ..... And mark on the polars the optimum upwind/ downwind angles to VMG ?
================================
If VMG is indeed relevant, you can find the optimum angle quite easily using the steering tool, as it shows you the boat speed and vmg values for various angles as you slowly move the pink 'steering line' to different headings on the map. Note near the bottom right corner of the polar diagram this information is provided. (Hint: look around 42 upwind, and 142 downwind, approx)
Also, it seems to vary very slightly in differing wind strengths, ie from 10 knts to 25.
You can also calculate vmg quite easily with any calculator, incuding the standard Windows one, using the formula: boatspeed * cos(D - twa), where D is 0 for upwind and 180 for downwind, and always use the positive twa (ie if it is actually -140, use 140, although this is really only necessary for downwind calculations.
More specifically twa should be replaced by angle to the rhumbline, but often twa is fine.
Hope this helps...

But one question to the developers of this great software (I am a programmer also).... As the vmg is only displayed to a single decimal point (in the game screen not the polar diagrams), is there any reason to sail at an angle that gives a vmg of, say, 7.43 than 7.47? or is it always rounded (up & down)?
I help develop the client interface for the best online ocean racing sim there is... __/)/)_/)__
Posted by
jakob


Users avatar

Posts
364
Registered at
2007-09-04 10:05:30
2009-01-25 21:04:02 - Re: Velocity made to course
Thanks for the feedback!! vmg is rounded only in the user interface. Internally we never round anything. Ohh yea, I think kalle rounds the numbers sent in the commands fom client to server. Hence, twa and cc is not sent to server with more than 2 decimals I think.

/Jakob (one of the developers)
...one of the guys behind the game...
Posted by
Adam


Users avatar

Posts
5
Registered at
2009-01-11 16:55:10
2009-01-26 12:53:30 - Re: Velocity made to course
AGage

I know that I'm just saying not everybody understands here what is really going on so an indicator of VMC not VMG is often better because it tells you how fast is the boat traveling to the next waypoint or finish or scoring gate. We know that the straight line is often not the fastest one ... and a lot of people get confused with the VMG as when they reaching the VMG is really small but they sailing so fast so why is it small ? I think it would be nice to have this indicator one day. Cheers.
Posted by
Zembu


Users avatar

Posts
41
Registered at
2008-12-15 20:58:27
2009-01-26 14:41:49 - Re: Velocity made to course
Re having VMC, firstly if it were possible, surely this would make it too easy and secondly it would impose a huge burden on the servers as everyone's waypoints (to which their respective VMC's related) would be different.
Posted by
jakob


Users avatar

Posts
364
Registered at
2007-09-04 10:05:30
2009-01-26 16:20:00 - Re: Velocity made to course
Hmmm, I think that VMC would confuse sailors too. Imagine the case here you are far from the rounding mark which is almost 90 degrees to your right and you are heading exactly straight to the goal. Your vmc would read almost 0.0 while sailing 25 knots! That will be confusing. Or..
...one of the guys behind the game...
Posted by
erratic


Users avatar

Posts
5
Registered at
2008-10-15 19:35:40
2009-01-27 06:25:00 - Re: Velocity made to course
^
There shouldn't be any additional load on the servers - the client could calculate it.

Page: 1 2 3 Next

Please login to post a reply.

Races

Next Race: 00d 00h 00m

Current Races:

Elephant Island to Marquesas 2025

Prepare to test your limits as we launch into the third leg of the RWW Series and the fifth leg of the 2025 Ocean Championship Series—an epic voyage from Elephant Island to the Marquesas in the heart of French Polynesia. This 4,700-nautical-mile challenge is a true test of endurance, strategy, and raw sailing adrenaline. Aboard the high-performance Volvo 70v4, competitors will face fierce headwinds as they round the legendary Cape Horn and make the thrilling transition from the Atlantic to the Pacific. Do you have what it takes to conquer the Pacific? Join us, and put your skills to the ultimate test.
PRIZE: SMPF
Race #1909
INFO by brainaid.de
VO70_v4 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: OCQ2 - RWW - OCCH - SUPSOL - SYC
Race starts: May 05th 11:00 Registration Open!
▶ Flash
GO TO RACE

Bosphorus Strait Sprint 2025


Welcome to the Bosphorus for a testing sprint twice through the narrow channel separating the Black Sea from the Mediter-ranean - the traditional bound-ary between Europe and Asia.
Race 1914
INFO by brainaid.de
Dehler 30 OD PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking:
SPRQ2 - SPRCH - SUPSOL - SYC
Race starts: May 04th 09:00 Registration Open!
▶ Flash
GO TO RACE

Bay to Bay 2025 - Leg 2 - Great Sandy Stait

After a thrilling opener, the 2025 edition of the Bay to Bay Yacht Race continues with Leg 2, bringing even more adrenaline and tactical excitement to the waters of the Great Sandy Marine Park. In collaboration with the Hervey Bay Sailing Club, our SOLers will once again take the helm of their lightning-fast 18-foot skiffs, this time tackling a 24-nautical-mile course through shifting breezes and tight competition.

With fresh legs, sharper tactics, and everything to race for, it’s anyone’s game! See you on the start line for the grand finale!
Race #1906
INFO from brainaid.de
18ft Skiff PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: B2B - SYC
Race starts: May 03rd 21:30 Registration Open!
▶ Flash
GO TO RACE

Bay to Bay 2025 - Leg 1 - Great Sandy Strait

Prepare for an electrifying start to the 2025 Bay to Bay Yacht Race! In partnership with the Hervey Bay Sailing Club, this first leg will see our SOLers take on a fast-paced, 16-nautical-mile sprint through the stunning waters of the Great Sandy Marine Park, weaving past the breathtaking landscapes of the Great Sandy National Park. Racing in high-powered 18-foot skiffs, the fleet will battle shifting winds, tricky tactics, and fierce competition—all in pursuit of victory! With the thrill of the race and an unforgettable sailing experience ahead, we can’t wait to see you on the start line!
Race #1905
INFO from brainaid.de
18ft Skiff PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: B2B - SYC
Race starts: May 03rd 01:00 Registration Open!
▶ Flash
GO TO RACE

Regata dell’Accademia Navale 2025

Welcome to Sailonline’s first partnership with the City of Livorno, in cooperation with the local yacht clubs and the Italian Navy, to offer you the online opportunity to race the Regata dell’Accademia Navale. 630nm in length, starting and finishing in Livorno, the race takes you the length and breadth of the Tyrrhenian Sea via Porto Cervo and Capri. Online, you will be sailing a Class 40, which should keep you well in with the top of the real-life fleet which we will be tracking on screen!
Race #1902
INFO by brainaid.de
Class 40 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: SYC
RACE CLOSE: Friday,
May 9 at 2300 UTC.
Race starts: Apr 27th 09:00 Registration Closed

▶ Flash
GO TO RACE

Transat à Deux 2025

Above you see a single-handed sailor semi-foiling his Beneteau Figaro III to the horizon. It is in fact Ireland’s Sailor of the Year and the overall winner of last year’s Solitaire du Figaro, Tom Dolan. Somehow, we got our hands on a polar for the Class, and rather than trying to surreptitiously track Tom and his mates in the 2025 edition of the Solitaire, sailing rather-short, single-handed legs across the Celtic Sea and Biscay, we thought we’d see how our virtual craft would fare on the Class’s double-handed 3900nm Trans-Atlantic, from somewhere in Brittanny to somewhere in the Caribbean via somewhere in the Canaries. Allez, mes braves!
Race #1901
INFOby brainaid.de
Figaro III foil PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: SYC
Race starts: Apr 20th 11:00 Registration Closed
▶ Flash
GO TO RACE

Sinbad by Balloon 2025 - Toamasina to Baia de l'Oiseau


You may recall that when last we visited Madagascar in the company of Sinbad, the Sultan commanded our intrepid inspirator to seek out fabled islands where in Summer the sun barely set. We did and we returned but the Sultan wasn’t happy with Sinbad’s report, so here we go again, now by SOL Balloon instead of sailing vessel. Expect to be in the air for at least 2100nm and depending on how the wind brings us, anything between two weeks and two months before we shall descend at the Sultan’s given coordinates!
Race #1884
INFOby brainaid.de
SOL Balloon PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: SYC - SBB
RACE CLOSE: Sunday,
May 18 at 2300 UTC.
Race starts: Apr 09th 11:00 Registration Closed
▶ Flash
GO TO RACE

Valparaiso to San Francisco 2025

Get ready for an exhilarating new challenge as we set sail on the fourth leg of the 2025 Ocean Championship Series! Following in the 19th century footsteps of Isabel Allende's heroine, Eliza Sommers, 'Daughter of Fortune', this all-new route takes us across the vast eastern Pacific, from Valparaíso, Chile, to San Francisco, California - a 3500nm journey of endurance, strategy, and pure sailing adrenaline. This leg will be raced aboard the powerful Rapido 60, pushing sailors to their limits as they navigate the open ocean. Do you have what it takes to conquer the Pacific? Join us and put your skills to the ultimate test!
PRIZE: SMPF
Race #1900
INFO by brainaid.de
Rapido 60 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: OCQ2 - OCCH - SUPSOL - SYC
Race starts: Apr 07th 11:00 Registration Closed
▶ Flash
GO TO RACE

Go to race archive

SYC Ranking

  1. Sailonline Yacht Club Member WRmirekd
  2. Sailonline Yacht Club Member Patrick70119
  3. Sailonline Yacht Club Member CriticalHippo
  4. Sailonline Yacht Club Member FreyjaUSA
  5. Sailonline Yacht Club Member vida
  6. Sailonline Yacht Club Member KaSToR
  7. Sailonline Yacht Club Member rumskib
  8. Sailonline Yacht Club Member Kipper1258
  9. Sailonline Yacht Club Member bonknhoot
  10. Sailonline Yacht Club Member rafa

View full list

Series

Mobile Client

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

The mobile client