Posted: 11/1/2014 11:08:52 AM
This month’s article is based on another question I received from a reader. The question asked about mark-room – in particular, mark-room with large booms. The boats in my diagrams tend to have very long booms and sometimes they exaggerate the real situation. Most booms don’t go far past the side of the boat. There are exceptions, though; some boats have boom that extend well beyond the rail when the boats are on a run. 8 Metres and Nonsuches come to mind. Both types have large mainsails, and so are also more likely to sail directly downwind on a run with their booms fully extended. 
by Andrew Alberti
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


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