The discussion in this link: https://www.racingrulesofsailing.org/posts/1585-at-the-finish-line may have some relevance. The discussion is a few years old, but in the discussion of Green’s rights if it had remained on starboard, I come away with a completely different conclusion than stated above. Does test rule 18 change anything?
Use this software to draw up the situation, as you saw it.
This is a guess at what might have transpired…
