Red infringes rule 13
or rule 10 and will be
penalized. At first, Red is clear ahead and rule 18.2(c) applies. However,
when Red passes head to wind, rule
18.2(c) no longer applies (see last sentence of rule 18.2(c)) and rule
13 does. Even if Red completes her tack in time, she will in this case break
rule 10 by not keeping
clear of the starboard-tack boat. See also case
81.