Sailonline.org - Online Sailing

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!

Tweets by @sailonline

Board » Flag Officers » Races » Victoria-Maui Tactics Articles

Posted by 76Trombones Posts 362 Registered at 2009-08-03 18:04:56	2010-06-29 13:58:19 - Victoria-Maui Tactics Articles
	The website for this year's running of the Vic-Maui Yacht Race has some interesting reading on tactics and descriptions of past races. The North Pacific High (visible as the big low-wind area at ~40N in SOL, wind circles clockwise) is a semi-permanent feature throughout the summer that typically dictates routing for the race. http://www.vicmaui.org/resource?articleid=45
Posted by captjack1942 Posts 239 Registered at 2008-01-18 03:24:03	2010-06-29 21:25:55 - Re: Victoria-Maui Tactics Articles
	It should be noted that the Pacific High (as the area of low to no wind is called) has been staying pretty far north this year. If this pattern holds up, this could be a year of record times. Not only for the Vic/Maui race, but also for the Pacific Cup race. http://www.pacificcup.org/ --- Last Edited by captjack1942 at 2010-06-29 21:27:46 ---
Posted by Exmeromotu Posts 71 Registered at 2008-12-10 15:22:17	2010-07-02 15:44:14 - Re: Victoria-Maui Tactics Articles
	Public Service Anouncement: Courtesty of Bluewater Racing, see attached pic, time of pic 1435Z Optimal Route is in black, the closer you stay inside the red area the better... 2nd Pic Optimal Route is in yellow. 3rd Pic for 7/3/2010 12Z 4th Pic 7/4/2010 12Z (from Gilles (leader) Position) Optimum Route is in Yellow (Follow the Yellow Brick Road ) Wide red area shows that there are plenty of routes that will get you pretty quick to Maui 5th Pic for 7/5/2010 12Z (from my position) Optimum Route in Yellow The Red Zone is a LOT Wider than from last update, banging a corner might just be the ticket... 6th Pic Optimum Route in Orange with reverse isochrones in 2 hour time steps time of fix 7/6/2010 0715 UTC Regards --- Last Edited by Exmeromotu at 2010-07-03 00:26:54 --- --- Last Edited by Exmeromotu at 2010-07-03 14:36:14 --- --- Last Edited by Exmeromotu at 2010-07-04 16:07:14 --- --- Last Edited by Exmeromotu at 2010-07-05 14:16:46 --- --- Last Edited by Exmeromotu at 2010-07-06 08:02:06 --- Attachments Vic_Maui.jpg (200.6 KB) Vic_Maui_2.jpg (200.0 KB) Vic_Maui_3.jpg (198.6 KB) Vic_Maui_4_Gilles_fix_4th_July_12Z.jpg (325.6 KB) Vic_Maui_5.jpg (328.6 KB) Reverse_Isochrones_July_6_0715_UTC.jpg (620.9 KB)
Posted by Gilles Posts 126 Registered at 2009-07-18 11:05:22	2010-07-04 19:15:50 - Re: Victoria-Maui Tactics Articles
	Nice that you make the homework for me.... but difficult to read the angle or the latitude on the graph Cheers!!!
Posted by 76Trombones Posts 362 Registered at 2009-08-03 18:04:56	2010-07-06 16:40:21 - Re: Victoria-Maui Tactics Articles
	Here's another look at reverse isochrones, calculated from Exmeromotu's position and .5deg grib.us weather. Colour bands/contours are 2h intervals. Tight race! Attachments VicMaui.jpg (641.5 KB) VicMauiContour.jpg (409.3 KB)
Posted by Exmeromotu Posts 71 Registered at 2008-12-10 15:22:17	2010-07-06 18:47:23 - Re: Victoria-Maui Tactics Articles
	Impressive!! How did you get the fleet positions into Bluewater?
Posted by 76Trombones Posts 362 Registered at 2009-08-03 18:04:56	2010-07-06 19:00:49 - Re: Victoria-Maui Tactics Articles
	Not bad eh? I'm impressed with how flexible bluewaterracing is. http://sailonline.org/googleearth/race_245_data.kml I imported the data from the kml. You can bring it in as route data and each boat will show up as mark. To import as position data (each boat becomes it's own route, can be "routed to finish" and if you were to update regularly would have all the tracks saved as well) I converted the xml/kml to csv/text. Pretty neat - since all the course data,config,polar etc are text files for very little effort you should be able to pretty much fully integrate BWR with SOL. Marks/courses can be loaded from the kml as well, so no need to manually define the race.
Posted by Exmeromotu Posts 71 Registered at 2008-12-10 15:22:17	2010-07-07 07:06:01 - Re: Victoria-Maui Tactics Articles
	For whoever is interested here's a copy of the Riptide 50 polar for Bluwater --- Last Edited by Exmeromotu at 2010-07-07 07:07:18 --- Attachments Riptide_50.pol (8.6 KB)
Posted by Schakel Posts 183 Registered at 2008-12-19 09:19:00	2010-07-07 07:15:39 - Re: Victoria-Maui Tactics Articles
	Hmm, odd. I get slightly different figures using the polar I get from the client Help tab's Boat Polar option. For instance, at ws 10, twa 30 you have a bs of 6.17 whereas I get a bs of 6.27. Wonder how that happened? Philip

Please login to post a reply.

Races

Next Race: 00d 00h 00m

Current Races:

Neumayer Station to Biscoe Wharf 2024

It’s Autumn now in Antarctica, the sun is permanently below the horizon, but during the day, from c 0900 to c 1700 local time, there is some twilight – nautical twilight, not to be confused with civil twilight which is brighter. The penguins are starting to huddle together to keep warm and the sea ice is growing. Time to get back to Biscoe Wharf then, before the water becomes impassible. Including a detour past Argentina’s main two Antarctic stations, it’s only 1900nm, so, although we’ll be in a hurry, we will take the bigger, better ice-classed Paratii 2 once more, just to be sure!
Race #1766
INFOby brainaid.de
Paratii 2 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: HLAT - SYC
Race starts: May 13th 19:00 Registration Open!

▶ Flash

GO TO RACE

Mellum to Trischen PYOC 2024

The next installment of the sprint race series sees us paying an all too rare visit to the German coast for a 30nm Pick Your Own Course race in Fox 9.50’s. Along the way enjoy the company of the popular harbour seals that populate the Wadden Sea.
Race #1810
INFO by brainaid.de
Fox 9.5 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: SPRQ2 - SPRCH - SUPSOL – SYC
RACE CLOSE: Wednesday,
May 15 at 2300 UTC.
Race starts: May 11th 09:00 Registration Closed

▶ Flash

GO TO RACE

Flight of the Godwit - Hegura to Anchorage 2024

Welcome to the second flight of our bar-tailed Godwit!. This race is the second of three legs reflecting the bird's annual migratory route, and simultaneously the fifth leg of the 2024 Ocean Race Championship. The voyage promises to be not only a test of skill and strategy but an immersive experience in the beauty of the archipelagos of the Aleutian Islands. Join us as we push the boundaries of seafaring prowess on this epic adventure. Let's fly like a godwit!
PRIZE: SMPF
Race #1791
INFOby brainaid.de
Maxi Trimaran PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: OCQ2 - GWT - OCCH - SUPSOL - SYC
RACE CLOSE: Sunday,
May 19 at 2300 UTC.
Race starts: May 06th 11:00 Registration Closed

▶ Flash

GO TO RACE

Melbourne to Osaka Prelude 2024

Welcome once again to what these days is Sailonline’s almost annual virtual Melbourne to Osaka Yacht Race. In real life, this double-handed 5500 nm race between these two sister cities, one deep in the southern hemisphere, the other high in the northern hemisphere, is run every four to five years, and is planned to be held again in 2025, so this race is a Prelude in partnership with the Melbourne Osaka Cup 2025 organising committee collaborating with the Ocean Racing Club of Victoria (ORCV), and the Sandringham (SYC) and Osaka Hokko (OHYC) yacht clubs. On this occasion, we’ll be racing the well-known First 40, a popular size of boat for a long-distance double-handed race. With the doldrums unavoidably lying across the track, you can expect to be at virtual sea for at least a month!
Race #1669
INFO by brainaid.de
First 40 Particulars
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: SYC
Race starts: Apr 20th 00:00 Registration Closed

▶ Flash

GO TO RACE

Go to race archive

SYC Ranking

View full list

Series

Mobile Client

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

The mobile client