From the other thread:
There is a possible scenario for a DNF: the crew notice their own mistake, stop racing and cruise to the next start never passing the finish line. I've done that before...
Rule 28.1 says "She may correct any errors to comply with this rule". That means you don't break this rule until you finish. At any point during the race, you can "unwind your string" and undo a mistake.
If you miss a mark and decide not to correct the error, you have two choices:
1) Elect not to finish (don't cross the finish line) and tell RC to score you DNF.
2) Finish and retire afterwards (tell RC to score you RAF).
I hope that helps,
Eric
