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 » False TWA = 0

Page: Previous 1 2

Posted by
kalle


Users avatar

Posts
413
Registered at
2007-06-01 09:58:04
2010-12-06 15:42:48 - Re: False TWA = 0
Did you measure the gap? :) Not saying it wasn't large enough in this case, but that is the root of the problem described above, it's possible to zoom in so much that a visible gap can in reality be a few centimeters.
Posted by
A2


Users avatar

Posts
347
Registered at
2009-10-26 00:39:42
2010-12-06 15:51:46 - Re: False TWA = 0
I did not measure said gap nor did I take a screen capture to document the situation as it was not my intention to make an issue out of the circumstance. In fact I jokingly referred to it as getting ice=bound in chat. However as more folks joined in to discuss it happening to them RC kept imploring anyone of us to submit this to the forum as I have done. There you have it. If it is past the time to have the ability to examine the tracks from the race then I suppose we are at the end of it.
None so blind
Posted by
kalle


Users avatar

Posts
413
Registered at
2007-06-01 09:58:04
2010-12-06 15:57:12 - Re: False TWA = 0
It's great that this was brought up, and posting it in the forum is definitively the right way, information in the client chat is quickly lost, but here we can keep it for reference if we encounter the same thing again.
Posted by
nacrr


Users avatar

Posts
55
Registered at
2010-01-01 15:57:17
2010-12-06 16:31:59 - Re: False TWA = 0
No, I didn't measure the gap. I believe I've sailed closer to land without this happening in previous races.

nacrr
Posted by
A2


Users avatar

Posts
347
Registered at
2009-10-26 00:39:42
2010-12-06 17:39:14 - Re: False TWA = 0
As I have previously stated at max zoom there was enough room for at least 6 boat widths as represented by the normal silhouette.
None so blind
Posted by
kalle


Users avatar

Posts
413
Registered at
2007-06-01 09:58:04
2010-12-07 08:51:57 - Re: False TWA = 0
Yes yes, but the boat icon size is fixed in *pixels*, not in the earth coordinate system :) At high zoom each pixel could represent a a very very very small distance on earth .
Posted by
76Trombones


Users avatar

Posts
362
Registered at
2009-08-03 18:04:56
2010-12-07 11:26:30 - Re: False TWA = 0
Max zoom is fixed more or less though isn't it? Or is it system dependent?

The boats is question were sailing close to, but parallel to the shore. The distances varied, but in all case were greater than margins that we typically allow on roundings or at the pin. The only difference from "normal SOL procedure" were that the run along the beach was very long, and the beach was well North.

You could not project forward along the cc tracks and hit land even many minutes forward. This is why the boats appeared to "just stop".

Is boat position calculated/displayed with greater precision than land? Are the coasts "jagged"?
Posted by
A2


Users avatar

Posts
347
Registered at
2009-10-26 00:39:42
2010-12-07 11:53:21 - Re: False TWA = 0
Just to reiterate this particular anomaly was not randomly placed amongst several boats but seemed to have a distinctly localized presence. Which is to say that each of these cited references occurred within close proximity to each other along the first 10% of the coastal stretch previously described and not in the following portion in which the boats were actually drawing closer to land as they proceeded up the coast to the eventual apex to be cleared.

Could there have been Islands so small that they did not register on the screen and yet snagged a few but not all of the fleet ?

--- Last Edited by Hubert Bonisseur at 2010-12-07 11:59:01 ---
None so blind

Page: Previous 1 2

Please login to post a reply.

Races

Next Race: 00d 00h 00m

Current Races:

ORCV Melbourne to Hobart 2024


Welcome to the legendary "Westcoaster," a race that has tested sailors for over 50 years. Spanning 435 nautical miles, this iconic journey takes racers from Melbourne, across the formidable Bass Strait, and around Tasmania's rugged west coast to the finish line in Hobart. Organized by the Ocean Racing Club of Victoria, the Westcoaster is renowned for its challenging conditions and adventurous spirit. This year, our SOLers will tackle the course in the swift and capable First 47.7, a yacht launched by Beneteau in 2000, built for speed and endurance in long ocean races. Get ready for an exhilarating ride in one of Australia’s most celebrated yacht races!
Race #1841
INFO by brainaid.de
First 47.7 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: SYC
Race starts: Dec 26th 23:00 Registration Open!
▶ Flash
GO TO RACE

Tasman Double 2024 - Sydney to Hobart

Christmas in Summer? Ah yes, we are in the southern part of our globe. Moment, 26 December is St. Stephen,'s Day known also as Boxing Day. To celebrate this day SOL invites you to race your Super Maxi 100 in the traditional 625nm run from Sydney to Hobart. This race is Leg 1 of our Double across the often-stormy waters of the Tasman Sea.
Race #1876
INFO by brainaid.de
Super Maxi 100 V2 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: TD - SYC
Race starts: Dec 26th 02:00 Registration Open!
▶ Flash
GO TO RACE

Refeno Rally 2024


Although since 1986 this 300nm course from Recife, Brazil, to Fernando Noronha Island has been run many times IRL, we have only used this route twice in SOL. This time it will be the route of the last race in the ARCH 2024 classification.
Although the winner of the general classification can already be determined, the fight for the next places on the podium should be fierce. There are several contenders and Dofour34 have them at their disposal. Since we are starting in Vida_Maldita's home waters, he will give us a 30-minute handicap. Or maybe we should give it to him? 😊
Race #1865
INFO from brainaid.de
Dufour 34 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking:
ARQ4 - ARCH - SUPSOL - SYC
Race starts: Dec 23rd 17:00 Registration Open!
▶ Flash
GO TO RACE

Tristan da Cunha TIMED Race 2024

Originally designed by NZL_Scotsman, we head for the remote outpost of Tristan da Cunha where gales and storms may come and go but the sea is everlasting. This 64nm TIMED race has been raced on several occasions before, and this time we will be doing it in Rustler 36s.
RE-REGISTER HERE to race again after finishing a run
Race #1875
INFO by brainaid.de
Rustler 36 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking:
TRQ4 - TRCH - SUPSOL - SYC
REGISTRATION CLOSE: Saturday, 28 December at 22:00 UTC
RACE CLOSE: Saturday, 28 December at 23:00 UTC
Race starts: Dec 15th 12:00 Registration Open!
▶ Flash
GO TO RACE

The Beagle in the Azores 2024


And west the Beagle went one final time to round the Cape of Good Hope on May 31 1836. Ashore, Darwin met up with the Astronomer Royal, Herschel, who just happened to be in South Africa at the same time mapping the southern skies. After sounding out his many ideas on evolution and extinction with Herschel, the Beagle now sailed north, stopping briefly in St Helena, Ascension and Brazil, and the Cape Verdes again, to reach the Azores on September 19, 1836. Fitzroy and Darwin at this stage were in a hurry to get back to Britain, but online in 2024 we will stay a little longer to explore this final remote archipelago in our virtual Tall Ship Class B Beagle, 630nm round and about the islands, minding as always in these waters not to bump into any large cetaceans!
Race #1758
INFOby brainaid.de
Tall Ship Class B PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: SVF - SYC
RACE CLOSE: Friday,
December 27 at 2300 UTC.
Race starts: Dec 14th 13:00 Registration Closed
▶ Flash
GO TO RACE

Christmas(W) to Christmas(E) Island 2024

Two waypoints, start and finish, and between them 5827 NM of two oceans. Not much time if we want to sit at the Christmas Eve table. You will need to maintain an average speed of over 10 knots, so prepare your 90ft well and choose the best of the many possible routes. Hands up everyone who knew there were TWO Christmas Islands?! OK, maybe you have sailed this Sailonline course before... but it's time to get ready for the 2024 challenge of a reversed race, starting in the Indian Ocean, racing to the Christmas Island in the Pacific! It also marks the conclusion of our prestigious Ocean Race Championship 2024. Please have fun! Fair winds!
PRIZE: SMPF
Race #1868
INFO by brainaid.de
90ft Monohull PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: OCQ4 - OCCH - SUPSOL - SYC
Race starts: Dec 02nd 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 FreyjaUSA
  3. Sailonline Yacht Club Member Vida_Maldita
  4. Sailonline Yacht Club Member CriticalHippo
  5. Sailonline Yacht Club Member rafa
  6. Sailonline Yacht Club Member Kipper1258
  7. Sailonline Yacht Club Member Satori
  8. Sailonline Yacht Club Member Sax747
  9. Sailonline Yacht Club Member BRENTGRAY
  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