Second in the new series 'Sunday Rules Snap' a rules picture from Menno:
He is sailing the red boat and has to give room at the mark to the sailor with the orange cap.
He writes: "The boat in the middle between the two other boats seems to break rule 18.3. It seems that the middle boat has tacked. You can see in the picture that the person has his hands at a position which you would have after a tack".
Whether or not this is a rule 18.3 infringement depends if Menno needed to luff above close-hauled. Perhaps after this snap was taken? In the photo he is still at a close-hauled course, his sail is fully 'used'.
Taken on the Sneekermeer, Class: Splash, Event: Easterregatta at a windward mark.