@Horton
I listened to the Trentless DFC, and I would be curious to know what the judge config was.
I don't believe tower judges would ever determine buoy count by looking at the video. Typically they would only judge the gates by looking at the video and judge turn buoys without video (except for review).
If boat video is used for judging, a separate video judge is used. I think the configuration used at the Masters is 1 boat judge, 2 tower judges and 1 video judge. (someone confirms)
In the example of Fred, boat judge calls 6, tower judges call 5. At this time video judge may disagree with he score and decide to review with chief judge and tower judges. If the video is not available or inconclusive, the original majority score of 5 will stand.
One could argue that if you are not sure, the score could be 5, or 6, therefore, why should the judges call 5 because they are not sure the skier went around 6 vs calling 6 because they think it is possible the skier did go around.
My 2 cents (and I am sorry for the video crew), is that for such an event, if you are in the boat holding a camera that will be used to make review calls, point at the freaking skier at all times!
If we used a simple iPhone, we would never be missing a frame.