At a recent event the fleet was sent on a triangle windward, leeward, windward course. The SI clearly depicted that the offset mark should be rounded for both the triangle and the windward leeward legs. Several boats did not round the offset mark on the triangle.
A mark set boat observed “several boats” miss the mark and noted two of the boats numbers, but did not note at least one other. The mark boat driver was not an appointed member of the RC but was a credible source.
Several competitors saw the infractions as well. After the days racing the PRO was approached about the infraction. The PRO indicated that if boats observed the infraction they should protest under rule 28.
Several competitors were upset that the RC would not take unilateral action and score the boats whose numbers were noted, an NSC.
The PRO did not have a mark boat recording roundings at this or any other mark except of course the start and finish. It would seem unduly prejudicial to take actions on one or two boats if there was not a conscious effort to observe and record all boats. This was an incidental observation.
While under A5.1 the RC can score the boats an NSC, I can not find where this is a manadarory action unless the RC themselves noted the infraction. It would seem more prudent that the observing boats file a protest under rule 28.