I think I know the answer, but I also know it would be good to check my understanding...
Situation: Two boats sailing to windward. Both boats are on Port tack. As the windward boat enters the zone, windward is clear ahead by about a boat length and over stood a little. The leeward boat is clear astern and probably on the lay line. The windward boat is sailing slightly slower because of issues on board. Inside of the zone, leeward becomes overlapped to the outside of the windward boat. Mark needs to be left to port. Windward boat begins to turn up to initiate a tack, leeward boat does as well however turns more quickly and leewards port bow touches windward's starboard hull about at the rear beam connection... who was obligated to avoid who? With contact,some rule was broken?
