Now, at the moment Artemis passed head-to-wind, she forfeited right-of-way (see rule 13), and entitlement to mark-room (see rule 18.2(c)). Instead, she is obligated to keep clear of Groupe Edmond. One second later, GE starts taking avoiding action (changes course and slacks sheets). I think one would have a very hard time convincing a jury that Artemis completed her tack, and then gave Groupe Edmond enough room to keep clear all within that one second.
Do the rules require that Artemis give Groupe Edmond enough room to duck Artemis, or just enough room to keep clear?
I agree that there wasn't enough room to duck. But it looks like they have plenty of time to tack. Artemis was head to wind within 3-4 seconds of starting the tack and effectively stop. The crash happened at 0:21. So, Groupe Edmond could have begin the turn at 0:17 which was after Artemis was on a starboard tack. All of that is assuming that Groupe Edmond will continue going toward Artemis at the same speed even though it began the tack. More likely, 2 seconds into the tack they will be moving at 1/3 of the speed.
