It was '85
We were just about to launch on our Dart 18 and the boat next to us went first, flipped and came back on its side. My wife went to help the crew but he had broken his leg! She didn't tell me till after we got back safely to the shore at the end of the race.
In fact, it was the Katwijk waves that haunt me most. Sailing the Dart 18 Europeans there was a nightmare.