Section L – Other Rules
TR CALL L10
Rule 11, On the Same Tack, Overlapped
Rule 16.1, Changing Course
Rule 19, Room to Pass an Obstruction
Rule 43, Exoneration
Question
Y and B are overlapped on port tack and approaching an obstruction which can be
passed on either side. Rule 17 does not apply to B.
B is sailing to pass to leeward of the obstruction, but from position 2 B luffs quickly to
pass to windward of the obstruction. Y responds immediately, but is unable to keep
clear of B. There is contact between them. Both boats protest. What should the call be?
Answer
Penalize B.
When B changes course to pass to windward of the obstruction she must give Y room
to keep clear under rule 16.1. B fails to do so and breaks rule 16.1.
Y breaks rule 11, but B was required to give her room to keep clear so Y is exonerated
under rule 43.1(b). Y also breaks rule 19.2(b) but she was compelled to do so by B's
breach of rule 16.1 and so she is exonerated under rule 43.1(a).
When a right-of-way boat on a course to pass on one side of an obstruction changes
course to pass on the other side, she must comply with any applicable rules of Part 2
Section A or B.