May/June 2019 - An Overview Of The Right-Of-Way Rules I

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May/June 2019 - An Overview Of The Right-Of-Way Rules I

As we start a new sailing season in Toronto, I am going to start a new view of the right-of-way rules. I hope that by giving an overview, I can help my readers understand the rules for themselves. The Racing Rules of Sailing has the right-of-way rules in Part 2 titled “When Boats Meet”. We start with an important concept. Boats are free to sail, at least according to this section of the rules, anywhere, in any direction, at any speed, with any course alteration until they meet another boat or boats. This section of the rules puts limitations on that sailing, once boats meet.


Part 2 of the rules has 4 sections, though I like to think of it as 5 parts. To me the first part is buried in the middle. It is rule 14 “Avoiding Contact”. The other 4 sections are as listed in the rules: Section A, Right of Way, Section B, General Limitations, Section C, At Marks and Obstructions and Section D, Other Rules.


Starting with rule 14, the essential reason for having right-of-way rules is to prevent collisions. Rule 14 starts by telling all boats to avoid contact. It then has some further guidance for right-of-way boats and boats entitled to room or mark-room. This further guidance depends on understanding who is right-of-way or entitled to room, so we will leave that until later.

Section A sets out right of way. It splits boats into mutually exclusive groups (a boat cannot belong to both at the same time). Boats may be on opposite tacks, in which case they are covered by rule 10, or they may be on the same tack. If boats are on the same tack, they may be overlapped and covered by rule 11, or they may be not overlapped and covered by rule 12. Finally, while one or both boats are tacking, rule 13 applies. All of these rules say that one boat shall keep clear of another boat. Rule 10 says that the port-tack boat shall keep clear, rule 11 says that the windward boat shall keep clear, rule 12 says that the boat clear astern shall keep clear and rule 13 says the boat that has passed head to wind shall keep clear. The principle is the same in each case – one boat has to keep clear of another. The introduction to this section tells us that the other boat has right of way.

The diagram shows a simple example of each of these rules. Red (port tack, rule 10), Yellow (windward, rule 11), White (clear astern, rule 12) and Grey (tacking, rule 13) must keep clear. Green, Blue, Black and Pink have right of way.


This all appears pretty straightforward, but we need an understanding of the meaning of certain key words and phrases. These are in italics in the rules. To determine who is on which tack, who is overlapped and what it means to keep clear, we have to look at a different section of the rule book, the definitions, and this we will do in the next article.


A boat shall avoid contact with another boat if reasonably possible. However, a right-of-way boat or one entitled to room or mark-room

  1. need not act to avoid contact until it is clear that the other boat is not keeping clear or giving room or mark-room, and

  2. shall be exonerated if she breaks this rule and the contact does not cause damage or injury.



A boat has right of way over another boat when the other boat is required to keep clear of her. However, some rules in Sections B, C and D limit the actions of a right-of-way boat.



When boats are on opposite tacks, a port-tack boat shall keep clear of a starboard-tack boat.



When boats are on the same tack and overlapped, a windward boat shall keep clear of a leeward boat.



When boats are on the same tack and not overlapped, a boat clear astern shall keep clear of a boat clear ahead.



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.

Posted: 5/1/2019 9:23:43 AM by Andrew Alberti | with 0 comments

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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 2020 are based on the Racing Rules of Sailing 2009-12 or 2013-2016 or 2017-2020 and have not been updated to reflect the changes that apply as of January 2021 with the publication of the Racing Rules of Sailing 2021-24. 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 an International 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 [email protected].


166 Years of Tradition | World-Class Sailing | Toronto Island & City Clubhouse
After You Cross The Finishing Line I
Tacking III
Tacking II
Publication Changes and Tacking
How to Finish
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