Team Race - CALL J 03  

Rule 16 Changing Course
Rule 18.2(d) Rounding and Passing Marks and Obstructions: Giving Room; Keeping Clear. Changing Course to Round or Pass
Rule D1.1(b) Rounding and Passing Marks and Obstructions: Giving Room; Keeping Clear. Not Overlapped at the Zone

Question
X is on a reach clear ahead of A when she enters the two length zone of a leeward mark. X’s course will take her to windward of the mark. She slows, and A becomes overlapped to leeward and about ½ boat’s width from her. X now bears away hard to round the mark. A reacts promptly, but is unable to keep clear. A protests. What should the call be?

Answer
A is keep clear boat from position 1 until both boats have passed the mark.
When the boats become overlapped A must also give X room.
Because X’s change of course to position 3 is to round the mark, rule 16 does not apply and A must keep clear. A fails to keep clear and breaks rule 18.2(c).
Penalize A.