November 2020 - Further down the line at the start

placeholder image

November 2020 - Further down the line at the start


In the first diagram, Red and Green look exactly the same as in the second diagram last month – Red has established an overlap to leeward of Green from clear astern. At the other end of the line, something very similar has happened – Yellow has established an overlap to leeward of Grey from clear astern. Yellow and Red are restricted by rule 17 from sailing above their proper course. We saw last month that the definition of proper course says that boats have no proper course before their start signal, so essentially rule 17 has no effect until position 4, when the start signal goes. Last month, I said that Red had to go down to a close-hauled course. The definition of proper course does not say anything about a close-hauled course. The definition says, “A course a boat would sail to finish as soon as possible in the absence of the other boats referred to in the rule using the term.” This is the course that Red or Yellow would sail in the absence of Green or Grey. If Green was not there, there is no reason for Red to luff above close-hauled since that would make her sails luff and she would slow down. Red’s proper course, is to sail to the next mark as quickly as possible, which means that she would sail close-hauled.


At the other end of the line, things are little different. Yellow is slightly below the pin. If Grey was not there, Yellow would pinch up to shoot the mark, being careful not to hit it. This is therefore Yellow’s proper course. Yellow cannot sail above her proper course, but since her proper course includes shooting the mark, she can luff up to do that. Since Yellow is the leeward boat, rule 11 requires Grey, as windward boat, to keep clear so Grey has to luff up as well. As soon as they are past the mark, Yellow’s proper course is to sail close-hauled, so she must do that. The rule for both boats is the same – they cannot sail above their proper course, but applies differently since the proper courses are different. Yellow must be careful when she is shooting the mark, not to go past head to wind. If she does go past head to wind, she will no longer be the leeward boat, she will be a tacking boat, and rule 13 will require her to keep clear of Grey.


Yellow and Red both must be careful to give Grey and Green room to keep clear when they luff. Although Yellow and Red are the right-of-way boats, the rule is not absolute; in this situation, when right-of-way boats alter course, rule 16 requires them to give room to keep clear. They can’t luff too suddenly or too quickly.

In the second diagram, we see a different type of luffing before the start. Green and Red are heading up into the wind to check the starting line. Both boats are head to wind at position 4, both checking the line. The difference between the two boats is that Green started on starboard and Red started on port. Neither boat has crossed head to wind so according to the definition of tack, which in turn relies on the definition of leeward and windward, they both remain on the tack they were on before they luffed into their wind-check. Accordingly, Green is still on starboard and Red is still on port. Yellow must keep clear of Green since Yellow is on port tack. Yellow also has to keep clear of Red, since Yellow is to windward of Red. If another boat came in from the other side on starboard tack, in a mirror image of Yellow, then Red would have to keep clear of her. It is always good to do your wind-check starting from starboard tack. It is important though, not to cross head to wind. If you cross head to wind, you are tacking, rule 13 kicks in and you lose right of way.


Leeward and Windward A boat’s leeward side is the side that is or, when she is head to wind, was away from the wind. However, when sailing by the lee or directly downwind, her leeward side is the side on which her mainsail lies. The other side is her windward side. When two boats on the same tack overlap, the one on the leeward side of the other is the leeward boat. The other is the windward boat.

Proper Course A course a boat would sail to finish as soon as possible in the absence of the other boats referred to in the rule using the term. A boat has no proper course before her starting signal.

Tack, Starboard or Port A boat is on the tack, starboard or port, corresponding to her windward side.



After a boat passes head to wind, she shall keep clear of other boats until she is on a close-hauled course. During that time rules 10, 11 and 12 do not apply. If two boats are subject to this rule at the same time, the one on the other’s port side or the one astern shall keep clear.


    When a right-of-way boat changes course, she shall give the other boat room to keep clear.

If a boat clear astern becomes overlapped within two of her hull lengths to leeward of a boat on the same tack, she shall not sail above her proper course while they remain on the same tack and overlapped within that distance, unless in doing so she promptly sails astern of the other boat. This rule does not apply if the overlap begins while the windward boat is required by rule 13 to keep clear.


Posted: 11/5/2020 11:25:30 AM by Andrew Alberti | with 0 comments

Trackback URL:

This page provides links to a set of articles original published in Kwasind magazine. The versions here include animated diagrams. The original articles can be found within the original magazines which are available online back to January 2007. 

Articles before December 2016 are based on the Racing Rules of Sailing 2009-12 or 2013-2016 and have not been updated to reflect the changes that apply as of January 2017 with the publication of the Racing Rules of Sailing 2017-20. A copy of the new rules can be found on
Andrew Alberti has been writing these monthly articles in the Kwasind since early 1997.  They explain the Racing Rules of Sailing. Andrew is a National Judge and National Umpire. He is a member of the Sail Canada Rules and Appeals Committees. The interpretation of the rules contained in the articles is Andrew's and not that of the RCYC or any of the committees he sits on. 

Send your questions to Andrew at


166 Years of Tradition | World-Class Sailing | Toronto Island & City Clubhouse
December 2020 - Proper Course – an over-used term
November 2020 - Further down the line at the start
September 2020 - Back to the Usual Start
July 2020 - An Unusual Start II
June 2020 - An Unusual Start
Post Archive
December 2020(0)
December 2020(1)
November 2020(1)
September 2020(1)
July 2020(1)
June 2020(1)
May 2020(1)
March/April 2020(1)
January/February 2020(1)
November/December 2019(1)
September/October 2019(1)
July/August 2019(1)
May/June 2019(1)
March/April 2019(1)
January/February 2019(1)
November/December 2018(1)
September/October 2018(1)
July/August 2018(1)
May/June 2018(1)
March/April 2018(1)
January/February 2018(1)
November/December 2017(1)
October 2017(1)
September 2017(1)
August 2017(1)
July 2017(1)
June 2017(1)
May 2017(1)
April 2017(1)
March 2017(1)
January/February 2017(1)
December 2016(1)
November 2016(1)
October 2016(1)
September 2016(1)
August 2016(1)
July 2016(1)
June 2016(1)
May 2016(1)
April 2016(1)
March 2016(1)
January/February 2016(1)
December 2015(1)
November 2015(1)
October 2015(1)
September 2015(1)
August 2015(1)
July 2015(1)
June 2015(1)
May 2015(1)
April 2015(1)
March 2015(1)
January 2015(1)
December 2014(1)
November 2014(1)
October 2014(1)
September 2014(1)
August 2014(1)
July 2014(1)
June 2014(1)
May 2014(1)
April 2014(1)
March 2014(1)
January 2014(1)
December 2013(1)
November 2013(1)
October 2013(1)
September 2013(1)
August 2013(1)
July 2013(1)
June 2013(1)
May 2013(1)
April 2013(1)
March 2013(1)
January 2013(1)
December 2012(1)
November 2012(1)
October 2012(1)
September 2012(1)
August 2012(1)
July 2012(1)
June 2012(1)
May 2012(1)
April 2012(1)
March 2012(1)
February 2012(1)
January 2012(1)
December 2011(1)
November 2011(1)
October 2011(1)
September 2011(1)
August 2011(1)
July 2011(1)
June 2011(1)
May 2011(1)
April 2011(1)
March 2011(1)
February 2011(1)
January 2011(1)
November 2010(1)
October 2010(1)
September 2010(1)
August 2010(1)
July 2010(1)
June 2010(1)
May 2010(1)
April 2010(1)
March 2010(1)
February 2010(1)
January 2010(1)