Question
Boats A on port tack and X on starboard are sailing parallel courses on
a run and are approaching a starboard-hand leeward mark. A is clear ahead
when she reaches the zone. A slows and X becomes overlapped outside her.
A now sails past the mark and luffs slightly. X has to change course and
protests.
What should the call be?
Answer
Penalize A.
When A reaches the zone, she is on port tack and must keep clear. However,
she is entitled to mark-room under rule 18.2(b).
At position 2, A is sailing her course to the mark and the obligation
on X to give her mark-room remains.
After position 3, A is no longer sailing her proper course to round the
mark. A must keep clear under rule 10, and by causing X to change course
A fails to keep clear.
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