16 Changing Course
16.1 When a right-of-way boat changes course, she shall give the other boat room to keep clear.
16.2 In addition, when after the starting signal a port-tack boat is keeping clear by sailing to pass astern of a starboard-tack boat, the starboard--tack boat shall not change course if as a result the port-tack boat would immediately need to change course to continue keeping clear.