In the fourth diagram, Phil—on port tack—and Stella—on starboard tack—are running toward a leeward mark to be left to port. The next leg is a beat to windward. When Phil reaches the zone at Position 1, he is clear ahead of Stella. Therefore, Rule 18.2(b) applies and entitles Phil to mark-room. Between Positions 1 and 3 Phil is entitled to space to sail in a seamanlike manner to the mark—i.e., to a position in which his bow is close to and on the required side of the mark (see ISAF Case 118). Between Positions 1 and 3 Phil sails within the mark-room to which he is entitled. Stella surfs on a wave, and just before she would have run into Phil's stern, she luffs to avoid contact. Stella protests Phil for breaking Rule 10. The protest committee finds that Stella gave Phil_ mark-room_ as required by Rule 18.2(b), and that she also avoided contact with him as required by Rule 14. Just before Stella reached Position 3, she needed to take action to avoid Phil, and so Phil broke Rule 10. However, because Phil was sailing within the mark-room to which he was entitled, he is exonerated under Rule 21(a). Neither boat is disqualified.