A boat in a short regatta (half an hour) crosses the finish line as 7th boat and just after her bow has passed the line, she touches the finish mark. The Race Committee on the pin-end finish boat see the boat touch the mark. They inform the other finish boat and a note is put on the finish list.
The boat crosses over the line and some heated argument on board is heard by the RC-people. They lose sight of the boat and concentrate on the next boat(s).
The boat returns to the finish line a couple of minutes later and is seen to sail downwind through the line towards the last mark.
After five minutes the finish window (time limit) runs out and because the next race is scheduled to commence as soon as possible, the committee boats leave their station and go down to the starting area. While they motor down, they see that same boat beating upwind.
The next race is started twenty minutes later after a short postponement because of a wind shift and all boats participate.
After racing the scoring is published and the boat who had touched the finish mark is scored DNF. The PC receives a request for redress within the protest time limit from that same boat, claiming she had finished.
What should they do?
Is that boat finished or not, and what should their score be?
Definition: Finish A boat finishes when any part of her hull, or crew or equipment in normal position, crosses the finishing line in the direction of the course from the last mark, either for the first time or after taking a penalty under rule 44.2 or, after correcting an error made at the finishing line, under rule 28.1.