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Now that 18.3 only applies at a port-hand buoy, that affects team racing digital N's to some extent. Can you now tack inside the zone at a starboard rounding? I'm having trouble thinking through what rules apply in the situation where a tack is completed within the zone, and is clear ahead, and a leeward boat then becomes overlapped inside. I've diagrammed it below (please forgive the zone appearing oversized).
See the second sentence of D1.1(b) (changes to 18.2(b)). Yellow is clear ahead when she enters the zone and therefore Blue must give her room. Yellow is not required to give Blue room even though Blue later establishes an leeward overlap. If Blue establishes an overlap before Yellow enters the zone then Yellow is required to give Blue room.
So, as diagrammed, Y does not tack in the zone at all.
Try shifting Y's track half a boat length to windward. Now
Y reaches the zone before she passes head to wind. Rule 18 does not apply because boats are on opposite tacks, still on a beat to windward (rule 18.1a).
Y then passes head to wind, boats are now on same tack,one of them in the zone, so rule 18 applies.
Rule 18.3 does not apply because this is not a mark to be left to port.
Rule 18.2b does not apply because boats were not overlapped nor was Y clear ahead when she reached the zone (because the definition of Clear Astern, Clear Ahead. Overlap did not apply between boats on opposite tacks).
So it is rule 18.2a that applies: if boats become overlapped, the boat overlapped outside shall give the boat overlapped inside mark-room, thus Y is required to give B mark-room.
Agree with JC if the scenario depicted in the diagram is correct. If we were go with JA's scenario change, it is my view that no part of RRS 18 would apply to this situation...straight RRS 11, amigos.
In my amended scenario, where Y reaches the zone before passing head to wind, from the instant that Y does pass head to wind, one of the boats is in the zone.
Which of the exceptions listed in rule 18.1 (a) to (d) do you say applies such that rule 18 does not apply?
18.2.a applies for both fleet and team racing. Blue is entitled to room. The unusual team racing change to 18.2.b does not apply as it is the wrong boat that tacks it only applies when the boat clear astern tacks in the zone. This allows the boat ahead to set a mark trap and not be forced under the usual rules to give room.
Try shifting Y's track half a boat length to windward. Now
Y reaches the zone before she passes head to wind. Rule 18 does not apply because boats are on opposite tacks, still on a beat to windward (rule 18.1a).
Y then passes head to wind, boats are now on same tack,one of them in the zone, so rule 18 applies.
Rule 18.3 does not apply because this is not a mark to be left to port.
Rule 18.2b does not apply because boats were not overlapped nor was Y clear ahead when she reached the zone (because the definition of Clear Astern, Clear Ahead. Overlap did not apply between boats on opposite tacks).
So it is rule 18.2a that applies: if boats become overlapped, the boat overlapped outside shall give the boat overlapped inside mark-room, thus Y is required to give B mark-room.
TR Call E10 may be helpful.
In my amended scenario, where Y reaches the zone before passing head to wind, from the instant that Y does pass head to wind, one of the boats is in the zone.
Which of the exceptions listed in rule 18.1 (a) to (d) do you say applies such that rule 18 does not apply?
What rule requires B to keep clear please?
Blue is entitled to room.
The unusual team racing change to 18.2.b does not apply as it is the wrong boat that tacks it only applies when the boat clear astern tacks in the zone. This allows the boat ahead to set a mark trap and not be forced under the usual rules to give room.