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 » Problem with course selection in new client.

Posted by
captjack1942


Users avatar

Posts
239
Registered at
2008-01-18 03:24:03
2008-12-10 19:05:59 - Problem with course selection in new client.
Last night at apx. 3:30 to 4:00 AM PST (11:30 --> 12:00 UTC) I had set alarm to wake to make course change at Lizard Pt. to finish. I spent about 30 minutes triple checking course adjustments to make sure that I had set a CC to hit the finish line just north of the south mark.
As I had to get up early and leave this morning, I was not able to check on finish till apx. 10:30 AM PST. When I did I found that my boat had passed to the south of the bottom mark and my boat was wrecked on shore.
Is the CC setting using the helm tool setting the course on Great Circle course or direct CC? If so please explain.
There are many times when we must by necessity be away from our computers and must trust that when a course is set it will be accurate. It just cannot be a moving target. When we set a precise course especally over such a relitively short distance (apx 40 Nm) we expect it to happen. :(
Posted by
NZL_PaulR


Users avatar

Posts
311
Registered at
2008-07-22 12:21:30
2008-12-10 20:43:48 - Re: Problem with course selection in new client.
Possible Solutions:

Set a course with a "little in the bank" = aim higher just in case, just like IRL sailing. If you aim at the mark, you'll need to tack to get around it.

Allow for a little leeway.

These ancient rules must be followed.

Just shows again how SOL is very similar to the real life situation!


--- Last Edited by Paul Rosser at 2008-12-10 20:44:28 ---
If it breaks, it's not strong enough!
Posted by
kalle


Users avatar

Posts
413
Registered at
2007-06-01 09:58:04
2008-12-10 20:46:21 - Re: Problem with course selection in new client.
I'll look at the code and come back with a straight answer.
Posted by
Hellsteeth


Users avatar

Posts
3
Registered at
2008-05-19 15:03:58
2008-12-11 18:29:13 - Re: Problem with course selection in new client.
Although I prefer the new flash tool over the old client, I have to say exactly the same happened to me as mentioned by captjack1942 as well last night. I zoomed in all the way over the finish line and saw my own '6 hour ahead line' crossing easily the southern tip of the finish line - with some head room. However, I also crossed the line and kept going until I hit land the other side. I woke up and sailed back over the line a second time before it was registered.
Maybe - the finish line could change colour like the rhumb line when you are on course to hit it?
Posted by
kalle


Users avatar

Posts
413
Registered at
2007-06-01 09:58:04
2008-12-11 18:52:20 - Re: Problem with course selection in new client.
Me and Jakob looked at the code. The "pick course" tool is not using great circle, but the value is rounded to two decimals (as shown in the box). That was unintended and a mistake - I will rewrite that code as soon as I've got some spare time.
Posted by
captjack1942


Users avatar

Posts
239
Registered at
2008-01-18 03:24:03
2008-12-13 22:34:12 - Re: Problem with course selection in new client.
Thanks Kalle, Yeah a tenth of a degree is way more than enough. IRL you're lucky to get within 5 degrees of a course line. :-)

Please login to post a reply.

Races

Next Race: 00d 00h 00m

Current Races:

Tasman Double 2025 - Hobart to Sydney

With Hobart astern and celebrations behind them, the fleet turns north for Leg 2 of our Tasman Double Series. Over 625 nautical miles, our SOLers aboard their mighty Super Maxi 100v2s return to the Tasman Sea, where shifting weather, demanding seas, and nonstop decisions shape every mile. The race back to Sydney rewards those who read the conditions best, manage their speed wisely, and stay focused until the final approach.
Race #2000
INFO by brainaid.de
Super Maxi 100v2 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: TD - SYC
Race starts: Jan 02nd 02:00 Registration Open!
▶ Flash
GO TO RACE

Cape Town to Rio 2026

Welcome to South Africa and RCYC's classic transatlantic Cape2Rio Race from Cape Town, South Africa, to Rio de Janeiro, Brazil. First run in 1971, this run is buddied with the IRL, Cape2Rio 2025 arranged by the Royal Cape Yacht Club with the cooperation of the
Iate Clube do Rio de Janeiro Despite this being announced the 2025 race (starting dec. 27) it is the 2026 SOL championship kickoff. This virtual version, will be raced once again in Mark Mills' 74ft speedster, the stunning C2R74.
Race #1996 INFO
by brainaid.de
C2R74 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking:
OCQ1 - OCCH - SUPBUD - SYC
Race starts: Dec 27th 12:00 Registration Open!

▶ Flash
GO TO RACE

ORCV Melbourne to Hobart 2025

Welcome to the legendary Westcoaster, a true test of endurance and seamanship that’s challenged sailors for over 50 years! Spanning 435 nautical miles, this iconic race takes the fleet from Melbourne, across the wild Bass Strait, and around Tasmania’s rugged west coast to Hobart. Organized by the Ocean Racing Club of Victoria, this year our SOLers will be racing the sleek and powerful Dehler 46—a fast, elegant regatta cruiser built for both speed and adventure. Get ready for an unforgettable offshore classic!
Race #1952
INFO by brainaid.de
Dehler 46 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: SYC
Race starts: Dec 27th 02:30 Registration Open!
▶ Flash
GO TO RACE

Tasman Double 2025 - Sydney to Hobart

Christmas in Summer? Indeed! Kick off the first leg of our two-leg Tasman Double series in the classic 625nm Sydney to Hobart race, this year in the upgraded SuperMaxi 100v2. Inspired by Neville Crichton’s legendary Alfa Romeo II and her near-sister Wild Oats XI, these yachts blaze across online and real-world waters alike. Feel the thrill even in storm-force winds as you tackle the Tasman Sea—dock in Hobart victorious, or at least in time for a well-earned post-Christmas drink!
Race #1953
INFO by brainaid.de
Super Maxi 100v2 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: TD - SYC
Race starts: Dec 26th 02:00 Registration Open!
▶ Flash
GO TO RACE

Valletta Sprint 2025


We invite you once again to this SOL classic around the Middle Sea, departing from and returning to historic Valletta. Loseley modelled on an IRL classic often sponsored by a luxury wristwatch purveyor, our c 600nm course takes us north as far as Stromboli, then west of Sicily and south to Lampedusa and back to Valletta probably via the strait between Malta and Gozo. This year we will race it all in very Meddy Dufour 40’s!
Race #1949
INFO by brainaid.de
Dufour 40 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: SYC
RACE CLOSE: Monday,
December 29 at 2300 UTC.
Race starts: Dec 20th 11:00 Registration Closed
▶ Flash
GO TO RACE

Go to race archive

SYC Ranking

  1. Sailonline Yacht Club Member KaSToR
  2. Sailonline Yacht Club Member WRmirekd
  3. Sailonline Yacht Club Member CriticalHippo
  4. Sailonline Yacht Club Member rafa
  5. Sailonline Yacht Club Member bonknhoot
  6. Sailonline Yacht Club Member vida
  7. Sailonline Yacht Club Member CollegeFund
  8. Sailonline Yacht Club Member Sax747
  9. Sailonline Yacht Club Member sassy63
  10. Sailonline Yacht Club Member Adlaem

View full list

Series

Mobile Client

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

The mobile client