Having cleared the finish line, Blue is no longer racing
and rule 24.1 begins to
apply to her at this point. By changing course as she does, Blue interferes
with Red who must change course to keep clear. Rule
24.1 requires Blue not to interfere with a boat still racing,
if this is reasonably possible. If Blue had held her course for a few more seconds
before heading off to pick up her lunch, she would not have interfered with
Red. So, not interfering with Red was very easily possible for Blue. She therefore
broke rule 24.1 and must
be penalized.