Seeing a diagram with the wind coming from the bottom makes my brain hurt. The convention for diagrams is to have the wind coming from the top.
Oh, and there's Boat Secenario (
http://boats.sourceforge.net/) that makes drawing these incidents so much easier:
![[Linked Image]](https://www.catsailor.com/forum/ubbthreads.php/ubb/download/Number/13247/filename/180504.jpg)
Position 1 - Yellow is clear astern and must keep clear (RRS 12)
Position 2 - Yellow has established an overlap to leeward; Green must keep clear (RRS 11). Yellow is limited initially by RRS 15 and by RRS 17. She may sail no higher than her proper course, but she gets to determine what proper course is (Case 14).
Position 3 - Yellow enters the zone as the inside boat. RRS 18 applies (RRS 18.1). Parts of RRS 18 that
do not apply - 18.3 (mark is left to starboard) and 18.4 (mark is a gate mark).
So we are left with 18.2, specifically 18.2(b) and the definition of mark-room:
18.2(b) If boats are overlapped when the first of them reaches the zone, the outside boat at that moment shall thereafter give the inside boat mark-room. If a boat is clear ahead when she reaches the zone, the boat clear astern at that moment shall thereafter give her mark-room.
Mark-Room - Room for a boat to leave a mark on the required side. Also, (a) room to sail to the mark when her proper course is to sail close to it, and (b) room to round the mark as necessary to sail the course.
Yellow is the leeward boat and gets to determine her proper course. She is owed mark room as long as she doesn't pass head to wind or leave the zone (RRS 18.2(d). She does neither in this case. Green must keep clear.
There was contact, so Green did not keep clear - penalty Green (RRS18.2(b) and RRS 14).
Because there was contact, there was a possible RRS 14 breach as well by Yellow, but if there was no damage or injury, she is exonerated (RRS14(b))
