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:

Aeolian Cruise 2025


This is the final race of the ARCH 2025 series and your last chance to improve your ranking. It promises to be an exciting 210nm slalom through the beautiful landscapes of the Aeolian Islands. Our Moody S38's will take off from Tropea and sail west between successive islands to reach the finish line in the Gulf of Palermo.
Fair Winds.
Race #1991
INFO from brainaid.de
Moody S38 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking:
ARQ4 - ARCH - SUPSOL - SYC
Race starts: Dec 15th 17:00 Registration Open!
▶ Flash
GO TO RACE

Chatham Island TIMED Chase 2025

The final TIMED race of 2025 takes us to the isolated and mysterious Chatham Islands archipelago 430 nm east of New Zealand’s South Island. There promises to be plenty of breeze from every point on the compass as we sail the Farr 38 around Chatham Island, Pitt Island, and The Forty Fours on this 124 nm course. 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 #1990
INFOby brainaid.de
Farr 38 Particulars
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking:
TRQ4 - TRCH - SUPSOL - SYC
RACE CLOSE: Saturday,
27 December at 23:00 UTC
Race starts: Dec 14th 12:00 Registration will open soon
▶ Flash
GO TO RACE

Christmas to Christmas Island 2025

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, maybe quite possible with this Maxi Trimaran, but prepare your vessel 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 2025 challenge of racing between Christmas Island in the Pacific to Christmas Island in the Indian Ocean! It also marks the conclusion of our prestigious Ocean Race Championship 2025. Please have fun! Fair winds!
PRIZE: SMPF
Race #1967
INFO by brainaid.de
Maxi Trimaran PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: OCQ4 - OCCH - SUPSOL - SYC
Race starts: Dec 01st 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 CriticalHippo
  3. Sailonline Yacht Club Member WRmirekd
  4. Sailonline Yacht Club Member rafa
  5. Sailonline Yacht Club Member vida
  6. Sailonline Yacht Club Member CollegeFund
  7. Sailonline Yacht Club Member bonknhoot
  8. Sailonline Yacht Club Member Panpyc
  9. Sailonline Yacht Club Member sassy63
  10. Sailonline Yacht Club Member BRENTGRAY

View full list

Series

Mobile Client

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

The mobile client