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!

Sailonline manual

Manual

Back to Snip <-- Previous Change | Next Change -->

Diff Summary
Title
Date 2007-12-20 07:59:57 2007-12-20 08:00:39
Editor jakob jakob
Tags

2007-12-20 07:59:57 by jakob
2007-12-20 08:00:39 by jakob
25----------25----------
26The basic way of steering is to either set at cons26The basic way of steering is to either set at cons
>tant compass course (CC) which simply means that t>tant compass course (CC) which simply means that t
>he boat will go in a "straight line". The other st>he boat will go in a "straight line". The other st
>eering mode is to set up the boat to keep a consta>eering mode is to set up the boat to keep a consta
>nt angle to the wind, to keep the true-wind-angle >nt angle to the wind, to keep the true-wind-angle 
>(TWA) constant. This means that if the wind change>(TWA) constant. This means that if the wind change
>s in direction, the boat will change its heading t>s in direction, the boat will change its heading t
>o maintain the wanted TWA. You can set any TWA in >o maintain the wanted TWA. You can set any TWA in 
>the range from 0 to 180 degrees where TWA=0 means >the range from 0 to 180 degrees where TWA=0 means 
>that the wind comes from straight ahead, TWA=180 m>that the wind comes from straight ahead, TWA=180 m
>eans that the wind comes from behind and TWA=90 me>eans that the wind comes from behind and TWA=90 me
>ans the wind in from starboard side. Negative TWA >ans the wind in from starboard side. Negative TWA 
>means wind in from port side (port=left). You can >means wind in from port side (port=left). You can 
>choose to steer directly or to delay the effects o>choose to steer directly or to delay the effects o
>f a command by the use of delayed commands. You si>f a command by the use of delayed commands. You si
>mply set up the steering as described above and th>mply set up the steering as described above and th
>en state how many hours the command should be dela>en state how many hours the command should be dela
>yed. Delayed commands is a neat feature that lets >yed. Delayed commands is a neat feature that lets 
>you attend business meetings and wedding dinners w>you attend business meetings and wedding dinners w
>hile helming a 60-foot single handed catamaran in >hile helming a 60-foot single handed catamaran in 
>a full gale! >a full gale! 
2727
28The chart and the race bounds28The chart and the race bounds
29-------------------------------29-------------------------------
t30The shorelines are supplied by the US National Geot30The shorelines are supplied by the US National Geo
>physical Data Center (NGDC). Resolution may vary d>physical Data Center (NGDC). Resolution may vary d
>epedending on the race type. Important to notice i>epedending on the race type. Important to notice i
>s that what you see is what there is. Be aware of >s that what you see is what there is. Be aware of 
>small islands but all water is deep and sailable. >small islands but all water is deep and sailable. 
>Your boat can naturally only sail on water. If you>Your boat can naturally only sail on water. If you
> collide with land the boat will stop, be pulled o> collide with land the boat will stop, be pulled o
>ut from the coastline some distance and be somewha>ut from the coastline some distance and be somewha
>t damaged. The damage is expressed as a certain dr>t damaged. The damage is expressed as a certain dr
>op in boat speed (performance). This loss in perfo>op in boat speed (performance). This loss in perfo
>rmance is temporary and will vanish in a number of>rmance is temporary and will vanish in a number of
> hours. Since the boat has stopped you need to sen> hours. Since the boat has stopped you need to sen
>d a new command to set the boat on a new course. D>d a new command to set the boat on a new course. D
>ue to the implementation on the server, a boat may>ue to the implementation on the server, a boat may
> actually cut a little land corner at special occa> actually cut a little land corner at special occa
>sions. It can happen to all boats but is nothing t>sions. It can happen to all boats but is nothing t
>o calculate on.  >o calculate on.
3131
32The boat performance curves32The boat performance curves
33----------------------------33----------------------------
34The boat performance is expressed in the so called34The boat performance is expressed in the so called
> polar curve, which is visible to you. The polar c> polar curve, which is visible to you. The polar c
>urve state the boat speed as a function of wind sp>urve state the boat speed as a function of wind sp
>eed and TWA. Take time and study the plot to learn>eed and TWA. Take time and study the plot to learn
> how to sail the boat efficiently. Different wind > how to sail the boat efficiently. Different wind 
>speeds are shown with different colored curves. Fo>speeds are shown with different colored curves. Fo
>r a certain wind speed follow the corresponding co>r a certain wind speed follow the corresponding co
>lored curve for all various TWA:s around the boat.>lored curve for all various TWA:s around the boat.
> For a certain wind speed and TWA you can read the> For a certain wind speed and TWA you can read the
> corresponding boat speed as represented by the di> corresponding boat speed as represented by the di
>stance from the origin to the colored curve. The p>stance from the origin to the colored curve. The p
>lot does not differ negative from positive TWAs si>lot does not differ negative from positive TWAs si
>nce our boats are symmetric. Your boat gets the po>nce our boats are symmetric. Your boat gets the po
>lar curve boat speed (=100% performance in the pol>lar curve boat speed (=100% performance in the pol
>ar window) at all times unless you have hit land a>ar window) at all times unless you have hit land a
>nd your boat has some level of damage.>nd your boat has some level of damage.
3535

Races

Next Race: 00d 00h 00m

Current Races:

Palk Bay TIMED Race 2026

This month’s TIMED race takes us to the shallow waters of Palk Bay located between India and Sri Lanka. Sail the impressive MC 38 around a roughly 140 nm course through two narrow channels before returning to the start/finish line in Jaffna.
This is a TIMEDrace so you may RE-REGISTER HEREto try again after finishing a run. You will have two weeks to test your skill and decision making after the race opens.
Race #2054
INFOby brainaid.de
PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking:
TRQ3 - TRCH - SYC
RACE CLOSE: Saturday,
29 August at 23:00 UTC
Race starts: Aug 16th 12:00 Registration will open soon
▶ Flash
GO TO RACE

The British Isles Circumnavigation 2026


The British Isles Circumnavigation is here! Inviting skippers to take on an epic 1,720nm clockwise voyage around Britain and Ireland! Starting and finishing in Cowes, the course passes some of the most iconic landmarks in offshore sailing, including Fastnet Rock, Tearaght Lighthouse, Black Rock, St. Kilda and Muckle Flugga before the long run home. Racing in our fast and versatile TP52, this Super-Buddy Championship race will reward smart routing, changing weather strategy and sustained concentration over every mile. Good luck!
Race #2052
INFO by brainaid.de
TP-52 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: SUPBUD - SYC
Race starts: Aug 09th 10:00 Registration Closed
▶ Flash
GO TO RACE

Easter Island to Tristan da Cunha 2026

Welcome to the second leg of our RNW series, rounding Cape Horn. This middle-most leg Round the New World, from Easter Island to Tristan da Cunha, is also part of our Ocean Championship, and as such the second race of OCQ3 2026. This race, like the previous race in the RNW series, will be sailed in our revised 'version 2' Imoca 60 Foil. Race #2050
INFO by brainaid.de
Imoca 60 Foil v2 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: OCQ3 - RNW - OCCH - SYC
RACE CLOSE: Sunday,
August 23 at 2300 UTC.
Race starts: Aug 03rd 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 Panpyc
  5. Sailonline Yacht Club Member rafa
  6. Sailonline Yacht Club Member cdhinman
  7. Sailonline Yacht Club Member rthinman
  8. Sailonline Yacht Club Member ms0689
  9. Sailonline Yacht Club Member BRENTGRAY
  10. Sailonline Yacht Club Member Sax747

View full list

Series

Mobile Client

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

The mobile client