If the fairness of the competition is not affected or a boat’s score has not been made significantly worse, though no fault of her own, by the error of the race committee, the race committee is not required to take any action.
While manoeuvring to take a penalty Rule 17: On the Same Tack: Proper Course
A boat taking a penalty or manoeuvring to take a penalty is not sailing her proper course. However rule 17 continues to apply while the boats remain overlapped within two hull lengths and on the same tack.