Team Race - CALL E 10      

Rule 18.1 Mark-room; When Rule 18 applies
Rule 18.2 Giving mark-room
Rule D1.1(b) Changes to rule 18.2(b)

Question 1
A on starboard tack and X on port tack, both close-hauled, are approaching a windward mark. X bears away and passes astern of A. A luffs slowly and nearly stops head to wind with the mark abeam. While A is luffing, X tacks to starboard and bears away towards the mark. A does not give X room at the mark, and X luffs to avoid a collision. There is a valid protest from X. What should the call be?

Answer 1
When A enters the zone, the boats are on opposite tacks on a beat to windward. Therefore, rule 18 does not apply. When X has passed head-to-wind, the boats are overlapped on the same tack and are both in the zone. Therefore, rule 18 applies. There was neither an overlap nor were they clear ahead/clear astern when the first of the two boats entered the zone. Rule 18.2(a) applies and this requires A to give X as an inside boat mark-room. 18.2(e) does not apply because the overlap was created during the tack and not from clear astern. Although X is keep-clear boat, she is entitled to room to sail to the mark and then room to sail her proper course while at the mark. A fails to give this room. Penalize A.

Question 2
Would the answer be different if X completes her tack outside the zone?

Answer 2
No. However, if A is clear ahead when X passes head to wind, rule D1.1(b) applies and X is not entitled to mark-room. By luffing, X keeps clear. No penalty.

Question 3
A reaches the zone of a windward mark to be left to starboard clear ahead of X. Both boats are on starboard tack. A luffs slowly and nearly stops next to the mark. X luffs and passes head to wind, and then passes head to wind again back onto starboard tack. When X passes head to wind the second time, she is overlapped to windward of A. Is A now required to give X mark-room?

Answer 3
No. X is required to give A mark-room. At position 1, A enters the zone clear ahead of X. Therefore rule 18 applies and X is required to give A mark-room under rule 18.2(b). When X passes head to wind onto port tack at position 2, rule 18 no longer applies because the boats are then on opposite tacks on a beat to windward; see rule 18.1(a). When X passes head to wind again at position 3, the boats are once again on the same tack, and rule 18 therefore applies.
Because A was clear ahead when she reached the zone at position 1, rule 18.2(b) requires the other boat thereafter to give her mark-room. This obligation remains in force provided that:
(1) rule 18 applies, and
(2) rule 18.2(b) is not turned off by any of the conditions in 18.2(c).
Thus, when the boats are again both on starboard tack and rule 18 reapplies, rule 18.2(b) still requires X to give mark-room to A.