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 » Azur's interesting track

Posted by
Rod


Users avatar

Posts
392
Registered at
2010-06-24 22:30:48
2014-03-23 15:30:23 - Azur's interesting track
Here is the track marked with the Measure Tool showing the random jumps over a period of about 30 min. There is no discernable pattern, yet the overall result from many hours is a consistently shaped blob.
If it breaks, it's not strong enough--if it doesn't, it's too heavy.
Attachments
Posted by
JB


Users avatar

Posts
305
Registered at
2013-03-07 08:54:34
2014-04-09 10:04:38 - Re: Azur's interesting track
Viva Rod.

At least for me, one of the oddities in SOL racing is the boat “jumps”, especially when sailing Timed Races.
Trying to manage that approaching a sailing mark is a bite like entering a lottery, which drives me close to mad.

I have situations where the boat is on a constant HDG, with constant TWD/TWA/TWS and she jumps alternatively between, let’s say, 0,120 nm (example: BS = 21,60 Kts and 20 sec time jumps) and aprox. half of that distance on the following “jump”!?!
Other times, the consecutive “jumps” become equal.

Please, can anyone explain me how this really works?
In the above mentioned conditions, is it possible to have coherent “jumps”, only resulting from the (simple) kinematic equation: “Distance = Velocity x Time”?
Sail Fair.
Posted by
Rod


Users avatar

Posts
392
Registered at
2010-06-24 22:30:48
2014-04-09 17:21:39 - Re: Azur's interesting track
The brief answer to all questions is "NO!" I have not been able to workout any consistent distance per jump, or time per jump, or even when or where a command will execute within a jump. I suspect that it is governed by when exactly the computer gets around to dealing with YOU among all of the competing commands of your competitors.
If it breaks, it's not strong enough--if it doesn't, it's too heavy.
Posted by
JB


Users avatar

Posts
305
Registered at
2013-03-07 08:54:34
2014-04-09 18:52:28 - Re: Azur's interesting track
Ok, Rod, couldn’t been more clear your answer.
But now, I’m confused.
Assuming (with a BIG IF) that my SOL race is (?) played “inside” my PC (the so named “Client”) why do I have to wait for SOL (the “Server”) to move the other boats first in order to start moving mine afterward?
Something here is certainly escaping my understanding.
Sail Fair.
Posted by
A2


Users avatar

Posts
347
Registered at
2009-10-26 00:39:42
2014-04-09 19:09:25 - Re: Azur's interesting track
My understanding is limited but I believe that the game is played on the server & reported to the client. Your boat receives approx. 4 updates per minute but not necessarily uniformly spaced & the fleet movements are once a minute.

By highlighting your boat from the list you will see its ghost ship as it appears to the rest of the fleet and can judge the relative positions more accurately.

* objects in your rear view mirror are closer than they appear.

--- Last Edited by A2R at 2014-04-09 19:55:37 ---
None so blind
Posted by
kroppyer


Users avatar

Posts
347
Registered at
2010-02-05 15:25:55
2014-04-09 20:03:04 - Re: Azur's interesting track
The client's requests for new data are fairly regular (every 15 seconds for own boat, 60 seconds for fleet).

The data that is, in response to the request, sent to the client is updated less regularly. I think it's about 10-15 seconds between these "server jumps".

So the server jumps and the client jumps are not in sync. This might cause two server jumps to happen in one client jump. That's where the long and short jumps come from.

Some people seem to work with the assumption that the jumps will follow the pattern short-short-long, or even short-short-short-long. I don't think this is a very reliable method, but it's probably the best you can do.
Posted by
JB


Users avatar

Posts
305
Registered at
2013-03-07 08:54:34
2014-04-10 11:43:48 - Re: Azur's interesting track
Kroppyer and A2R, thank you for your responses.
Unfortunately, the erratic “jump” dilemma continues in the next TR’s.
Sail Fair.

Please login to post a reply.

Races

Next Race: 00d 00h 00m

Current Races:

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 #1900
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 Open!
▶ Flash
GO TO RACE

SSANZ Triple Series 2025 - Race 3

Welcome to the grand finale of this year's SSANZ Triple Series! The stage is set for the Lewmar 50, a thrilling 39nm challenge tracing the southern shores of the stunning Waiheke Island, pushing out to Tarahiki before the sprint back to Islington Bay. Expect fast legs, tactical battles, and no shortage of drama as our SOLers take on the waters in their Young 88s, lining up once again against the talented IRL members of the Young 88 Association. With the series on the line and everything still to fight for, it all comes down to this final race!
Race #1934
INFO by brainaid.de
Young 88 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking:
SSANZ - SYC
Race starts: Aug 29th 21:15 Registration Open!
▶ Flash
GO TO RACE

Red Eye - Myth of Malham 2025

In 1947, Hugh McLean & Sons of Gourock, Scotland built a radical racing yacht for John Illingworth, soon-to-be Commodore of the RORC, to a design by Laurent Giles. With a masthead rig, giving her ‘free’ sail area per the rules of the time, and short overhangs reducing pitching, Myth of Malham went on to win The Fastnet that year and again in 1949, and to compete in numerous Admiral's Cups. In 1958, in honour of the yacht, the Myth of Malham race was conceived - a mini-Fastnet to the first lighthouse on a rock west of Cowes, Eddystone, rather than the second, to be held in non-Fastnet years. IRL this year it has been raced already, but this stops us not from “Red Eye” racing its online 230nm in Fareast 31Rs, leaving how to deal with the Isle of Wight open to your own discretion.
Race #1847
INFOby brainaid.de
Fareast 31R PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: SYC - RED
RACE CLOSE: Monday,
September 1 at 2300 UTC.
Race starts: Aug 25th 12:00 Registration Closed
▶ Flash
GO TO RACE

Africa by Sea 2025 - Maputo to Mogadishu


The fifth leg of our exploration of Africa By Sea takes us north along the length of the Continent’s succulent sub-tropical and tropical Indian Ocean coast. Much fought over by traders and colonists both well-before and after a Portuguese expedition under the command of Vasco da Gama first sailed there from Europe back in the 16th century, it is yet to be properly explored as a yachting destination. With plenty of islands off- and inshore, small and very large, there is much to interrupt your 1900nm voyage and visit in your Swan 65, from Maputo to Mogadishu! Race #1858
INFOby brainaid.de
Swan 65 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: SYC - ABS
RACE CLOSE: Saturday,
September 6 at 2300 UTC.
Race starts: Aug 20th 17:00 Registration Closed
▶ Flash
GO TO RACE

Go to race archive

SYC Ranking

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

View full list

Series

Mobile Client

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

The mobile client