Mac is STB, Sova and FP windward and might sail safely straight on. However, Sova gybed then FP gybed too. To not go to contact Mac gybed too. In my opinion, Sova and FP broke rule 10 at this instant.
There was no obstruction :
Nope : because they could sail straight on with no danger and even with no need to change course.An object that a boat could not pass without changing course substantially
Nope : one side is to sail straight on. The other side is to gybe as they made abusely.An object that can be safely passed on only one side
What do you think ?
Jean-Luc