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
»
Real Life Honesty Race question
Please login to post a reply.
Posted by NOR_Jawik ![]() |
|
No you are not. Fix course on Lat/Lon and no rumbline. I like it.
|
|
Posted by BER_Baggus ![]() |
|
@Gilles & 76 - to be honest, the course is probably too short, only a few hours long. What I was after is what wind direction would be best for our polars. I'll see if I can all the GPS coordinates.
|
|
Posted by 76Trombones ![]() |
|
It's a good exercise! It's not the same as ocean-racing routing, but the tools are similar. Even without shifts and predictors and gribs and such, just identifying favourable prevailing wind conditions is a useful trick.
Totally doable with a spreadsheet. To make life easier for such things it's helpful to fill the area between VMGs (and any other hollows) so that you don't need to worry about tacking. |
|
Posted by BER_Baggus ![]() |
|
It's totally doable with a spreadsheet, assuming someone has that spreadsheet......
![]() The routing software is good, but it would only show you the optimum course for the forecast winds. I want too see what the best wind direction would be so that when, probably in 4 months time, it actually blows from that direction, we can make the best time. If that makes sense. |
|
Posted by Smo ![]() |
|
Should be quite obvious on just cheking wx no need for routers more tricky to get crew there in right time. And good sailing makes it.
--- Last Edited by Smo Smo at 2011-04-15 06:05:01 --- |
|
Posted by 76Trombones ![]() |
|
I was going to show how to do this just with pen and paper, but here's an example spreadsheet. Change the leg angles and lengths. This is both clumsier and more complicated than necessary, but maybe can tell what is going on.
![]() |
|
Posted by A2 ![]() |
|
I am quite interested in All pen & paper solutions to the various sailing conundrums that encompass navigational exercises.
Please show your work ![]() P.S. When I open the .xls file in NeoOffice I get get a series of #ADDIN? errors for the Spline computation in the field as well as the final Best TWD & Fastest Time --- Last Edited by Hubert Bonisseur at 2011-04-15 20:22:53 --- None so blind |
|
Posted by 76Trombones ![]() |
|
In words:
Convert your polar from knots to minutes/nm. For each leg, multiply the polar by the leg length and transfer to a plot using your dividers. The curve for each leg is added to the one preceding it. The resulting plot reads time, so your best TWD is the minimum. Here is the data used in the spreadsheet example - the fastest angle in 12kt wind is ~214 degrees. Course Leg 1 Leg 2 Leg 3 Leg 4 CC 0 45 270 130 NM 3 2 4 5 1/4 Ton 6 8 10 12 14 16 20 52 4.41 5.21 5.75 6.06 6.23 6.34 6.45 60 4.70 5.48 5.97 6.28 6.50 6.62 6.75 75 4.98 5.85 6.33 6.63 6.77 7.01 7.23 90 5.24 6.01 6.48 6.85 7.13 7.27 7.59 110 5.03 5.82 6.32 6.75 7.14 7.55 8.23 120 4.74 5.60 6.16 6.59 6.99 7.40 8.38 135 4.15 5.10 5.80 6.26 6.67 7.05 7.93 150 3.51 4.47 5.25 5.86 6.30 6.68 7.43 Bangle 43.4 42.0 40.4 40.9 40.0 39.3 39.4 BVMG 2.87 3.48 3.87 4.13 4.28 4.38 4.46 Rangle 146.6 152.9 161.6 167.0 172.9 174.7 175.2 RVMG 3.04 3.87 4.62 5.27 5.81 6.22 6.93 |
|
Posted by 76Trombones ![]() |
|
-
Yes the posted example uses a plugin for the interpolation functions and I don't think OpenOffice handles it correctly. Hmm... There's a cubic spline function posted at oooforum.org. Very much worth looking into for sailing spreadsheets. I used a second function to find the minimum, but there areother ways to do that. |
|
Posted by Rod |
|
Duuuuh!!! Now I'm feeling stupid! I even taught coastal navigation for a while in the Navy but I do not have any idea what would be needed to get any info out of your spreadsheet. Hands up! How many SOLers know how to do this?
Sorry 76T, but its got to be simpler than that to help ME. If it breaks, it's not strong enough--if it doesn't, it's too heavy. |
Races
Next Race: 00d 00h 00m
Current Races:
Round Greenland 2024
![]( https://sailonline.org/static/var/sphene/sphwiki/attachment/2023/12/16/ICEBERG.png )
Race #1780
INFOby brainaid.de
Paratii 2 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: HLAT - SYC
Race starts: Aug 29th 19:00 Registration Open!
GO TO RACE
Pico Island TIMED Race 2024
![]( https://sailonline.org/static/var/sphene/sphwiki/attachment/2024/08/10/Flag_of_the_Azores.png )
Race #1833
INFO by brainaid.de
Mini 6.50 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking:
TRQ3 - TRCH - SUPSOL - SYC
RACE CLOSE: Saturday,
31 August at 23:00 UTC
Race starts: Aug 18th 12:00 Registration will open soon
GO TO RACE
The Beagle in the Galapagos 2024
![]( https://sailonline.org/static/var/sphene/sphwiki/attachment/2023/12/13/HMSBeagle.png )
It took the Beagle a further fifteen months of adventure and exploration to, on September 15, 1835, reach the Galapagos Islands, whose populations of giant tortoises and iguanas and finches and mockingbirds of great variety from island to island were such a significant inspiration to Darwin formulating his Theory of Evolution. It won’t be a retrace of his peregrinations, but here in 2024 an interesting 500nm course will take you by most of the archipelago’s islands, in your very own Beagle, a Class B Tall Ship!
Race #1754
INFOby brainaid.de
Tall Ship Class B PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: SVF - SYC
RACE CLOSE: Monday,
August 19 at 2300 UTC.
Race starts: Aug 08th 13:00 Registration Closed
GO TO RACE
SOL's Balloon Transat 2024
![]( https://sailonline.org/static/var/sphene/sphwiki/attachment/2024/07/03/SOLBalloon_1.png )
Sailonline offers a huge variety of boats to sail in. One of the more unusual ones has got to be SOL's Balloon, which was polarized by past SOLmaster 76Trombones. Notably, the SOL Balloon will actually ‘sail’ in other directions other than straight downwind, although it will not 'sail' over land or beyond a 'beam reach'. This year we have a new course to challenge all you aeronaut’s and we will be taking the Balloon across the Southern Atlantic from Cape Horn to 'land' it in the Cape of Good Hope. Tips: Wait for favourable winds before launching and set DC aware predictor to maximal length.
Race 1831
INFO by brainaid.de
SOL Balloon PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking:
None
Race starts: Aug 06th 19:00 Registration Closed
GO TO RACE
San Francisco to Ushuaia 2024
After a superlong RTW-leg3 (27 days), we have had a month to recover, and maintain our boat, in order to continue our around the world race. Leg 4, even longer than the previous, takes us from California to the world's southernmost city Ushuaia. No waypoints, even "the Ditch" is an option, but maybe a bit too much of a treat. With 6300 nm to go, the estimated duration of this race 29 days. This course is also the August edition of our ocean race championship.
PRIZE: SMPF
Race# 1717
INFO from brainaid.de
Swan 65 PARTICULARS
WX updates:
0430 / 1030 / 1630 / 2230
Ranking: OCQ3 - OCCH - RTW - SUPSOL - SYC
Race starts: Aug 05th 11:00 Registration Closed
GO TO RACE
SYC Ranking
Series
- SYC ranking
- 2024 TS
- 2024 TRQ4
- 2024 TRQ3
- 2024 TRQ2
- 2024 TRQ1
- 2024 TRCH
- 2024 TD
- 2024 SVF
- 2024 SUPerSOLer
- 2024 SSANZ
- 2024 SPRQ4
- 2024 SPRQ3
- 2024 SPRQ2
- 2024 SPRQ1
- 2024 SPRCH
- 2024 SHE
- 2024 RTW
- 2024 RMS
- 2024 PIC
- 2024 OCQ4
- 2024 OCQ3
- 2024 OCQ2
- 2024 OCQ1
- 2024 OCCH
- 2024 LOOR
- 2024 HILAT
- 2024 GWT
- 2024 DN
- 2024 CRW
- 2024 B2B
- 2024 ARQ4
- 2024 ARQ3
- 2024 ARQ2
- 2024 ARQ1
- 2024 ARCH
- 2023 TS
- 2023 TRQ4
- 2023 TRQ3
- 2023 TRQ2
- 2023 TRQ1
- 2023 TRCH
- 2023 TD
- 2023 SVS
- 2023 SUPerSOLer
- 2023 SSANZ
- 2023 SPRQ4
- 2023 SPRQ3
- 2023 SPRQ2
- 2023 SPRQ1
- 2023 SPRCH
- 2023 SHE
- 2023 RTW
- 2023 RNI
- 2023 RMS
- 2023 PIC
- 2023 OCQ4
- 2023 OCQ3
- 2023 OCQ2
- 2023 OCQ1
- 2023 OCCH
- 2023 LOOR
- 2023 DN
- 2023 ARQ4
- 2023 ARQ3
- 2023 ARQ2
- 2023 ARQ1
- 2023 ARCH
- 2022 TRQ4
- 2022 TRQ3
- 2022 TRQ2
- 2022 TRQ1
- 2022 TRCH
- 2022 TD
- 2022 Tall Ships
- 2022 SUPerSOLer
- 2022 SSANZ
- 2022 SSA
- 2022 SPRQ4
- 2022 SPRQ3
- 2022 SPRQ2
- 2022 SPRQ1
- 2022 SPRCH
- 2022 SHE
- 2022 OCQ4
- 2022 OCQ3
- 2022 OCQ2
- 2022 OCQ1
- 2022 OCCH
- 2022 NTR
- 2022 LOOR
- 2022 CTR
- 2022 ARQ4
- 2022 ARQ3
- 2022 ARQ2
- 2022 ARQ1
- 2022 ARCH
- 2021 TRQ4
- 2021 TRQ3
- 2021 TRQ2
- 2021 TRQ1
- 2021 TRCH
- 2021 TD
- 2021 Tall Ships
- 2021 SYCQ4
- 2021 SYCQ3
- 2021 SYCQ2
- 2021 SYCQ1
- 2021 SYCCH
- 2021 SUPerSOLer
- 2021 SSANZ
- 2021 SPRQ4
- 2021 SPRQ3
- 2021 SPRQ2
- 2021 SPRQ1
- 2021 SPRCH
- 2021 Shetland
- 2021 PAC6
- 2021 OCQ4
- 2021 OCQ3
- 2021 OCQ2
- 2021 OCQ1
- 2021 OCCH
- 2021 ESRW
- 2020 TSE
- 2020 TSA
- 2020 TRQ4
- 2020 TRQ4
- 2020 TRQ3
- 2020 TRQ2
- 2020 TRQ1
- 2020 TRCH
- 2020 Tasman Double
- 2020 SYCQ4
- 2020 SYCQ3
- 2020 SYCQ2
- 2020 SYCQ1
- 2020 SYCCH
- 2020 SUPerSOLer
- 2020 SSANZ
- 2020 SRQ4
- 2020 SRQ3
- 2020 SRQ2
- 2020 SRQ1
- 2020 SPRCH
- 2020 Shetland
- 2020 RTW
- 2020 RNI
- 2020 Odyssey
- 2020 OCQ4
- 2020 OCQ3
- 2020 OCQ2
- 2020 OCQ1
- 2020 OCCH
- 2020 A3
- 2019 TRQ4
- 2019 TRQ3
- 2019 TRQ2
- 2019 TRQ1
- 2019 TRCH
- 2019 Tasman Double
- 2019 Tall Ships
- 2019 SYCQ4
- 2019 SYCQ3
- 2019 SYCQ2
- 2019 SYCQ1
- 2019 SYCCH
- 2019 SUPerSOLer
- 2019 SSANZ
- 2019 SRQ4
- 2019 SRQ3
- 2019 SRQ2
- 2019 SRQ1
- 2019 SPRCH
- 2019 Shetland
- 2019 Round New Zealand
- 2019 OCQ4
- 2019 OCQ3
- 2019 OCQ2
- 2019 OCQ1
- 2019 OCCH
- 2018 TRQ4
- 2018 TRQ3
- 2018 TRQ2
- 2018 TRQ1
- 2018 TRCH
- 2018 Tasman Double
- 2018 Tall Ships
- 2018 SUPSOL
- 2018 SSANZ Triple
- 2018 SRQ4
- 2018 SRQ3
- 2018 SRQ2
- 2018 SRQ1
- 2018 SPRCH
- 2018 Shetland
- 2018 Shackleton Challenge
- 2018 OCQ4
- 2018 OCQ3
- 2018 OCQ2
- 2018 OCQ1
- 2018 OCCH
- 2018 40CH
- 2017 TS RDV
- 2017 TRQ4
- 2017 TRQ3
- 2017 TRQ2
- 2017 TRQ1
- 2017 TRCH
- 2017 Tasman Double
- 2017 Tall Ships
- 2017 SWR
- 2017 SUPSOL
- 2017 SSANZ Triple
- 2017 SSANZ RNI
- 2017 SPRR3
- 2017 SPRR2
- 2017 SPRR1
- 2017 SPRCH
- 2017 Red Dot
- 2017 OCQ4
- 2017 OCQ3
- 2017 OCQ2
- 2017 OCQ1
- 2017 OCCH
- 2017 40CQ3&4
- 2017 40CQ1&2
- 2016 TRQ4
- 2016 TRQ3
- 2016 TRQ2
- 2016 TRQ1
- 2016 TRCH
- 2016 Tasman Double
- 2016 Tall Ships
- 2016 SUPSOL
- 2016 SSANZ Triple
- 2016 SRQ4
- 2016 SRQ3
- 2016 SRQ2
- 2016 SRQ1
- 2016 SPRCH
- 2016 RTWR
- 2016 OCQ4
- 2016 OCQ3
- 2016 OCQ2
- 2016 OCQ1
- 2016 OCCH
- 2016 Corporate Open Gold
- 2016 A3
- 2015 TRQ4
- 2015 TRQ3
- 2015 TRQ2
- 2015 TRQ1
- 2015 TRCH
- 2015 Tasman Double
- 2015 Tall Ships
- 2015 SYQ4
- 2015 SYQ3
- 2015 SYQ2
- 2015 SYQ1
- 2015 SYCCH
- 2015 SUPSOL
- 2015 SSANZ Triple
- 2015 SRQ4
- 2015 SRQ3
- 2015 SRQ2
- 2015 SRQ1
- 2015 SPRCH
- 2015 OCQ4
- 2015 OCQ3
- 2015 OCQ2
- 2015 OCQ1
- 2015 OCCH
- 2015 Aegean Rally
- 2014 Timed Races Championship
- 2014 Tasman Double
- 2014 Tall Ships
- 2014 SYC Championship
- 2014 SSANZ Trio
- 2014 SSANZ RNI
- 2014 Sprints Championship
- 2014 Scandinavian Tour
- 2014 Round The World Race
- 2014 Ocean Championship
- 2014-2015 Sailonline World Race
- 2013 Tall Ships
- 2013 SYC Championship
- 2013 SSANZ B&G Simrad
- 2013 Capt Anderson
- 2012 W Australia Regatta
- 2012 Tall Ships
- 2012 SSANZ B&G Simrad
- 2012 RNZ Two Handed
- 2012 Global Challenge
- 2012 Ecker Cup
- 2012 Black Sea
- 2012 A3
- 2011 Vancouver Island
- 2011 Tasman Double
- 2011 SSANZ B&G Simrad
- 2011 SOL Global Challenge
- 2011 SJORA Series
- 2011 Scandinavian Tour
- 2011 Round North Island
- 2011 Asian Sprints
- 2011-2012 SOL World Race
- 2010 Tasman Double
- 2010 Ouzo Rally
- 2010 Iberian Tour
- 2010 Auckland Regional
- 2009 French SOLo
- 2009 Bosphore - Bretagne
- 2008 SYCC
- 2008 -2013 SYC Week Race Championship
- 2008 -2013 SYC Week-End Race Championship
- 2008 -2013 SYC Ocean Race Championship
- 2008-2009 Sailonline Ocean Race
- 2004 LOOR
Mobile Client
SYC members have the benefit of access to our mobile/lightweight web client!