The sailor was at the front of the fleet and I think finished 1st or 2nd in that particular race.

I appreciate everyone's input. In the future I think I will call out to the boat that they hit the mark and yell protest. There are other factors here too. What if, in this case, you said something to the PRO after the race while still on the water? Once again, I suppose since it isn't an official protest the PRO isn't obligated to do anything either?