Richard Gladwell sums it up nicely . . .
Umpires admit error in controversial win for Kiwis
As has been seen in the first three days of racing in the 35th America’s Cup, the competition has been closer than ever. The outcome of each race is unpredictable and races are being won and lost by extremely fine margins. This means that the pressure on the umpires to make the correct calls is greater than ever before.
As in all sports, umpires are not infallible and on this occasion, even with the best sailing umpires in the world that are overseeing the 35th America’s Cup, they have admitted that their decision, on reflection, may have been different.