He started around 19h45 in the evening and sailed all night long if I remember correctly. He even sailed more then 24 hrs to be sure.
You can see the movie here:
You can see my track from yesterday. This is +- 70 km, imagine 10x this! It is only flat at the ends, inbetween is some nasty chop.
And he probably sailed a bit longer before he gybed so even more chop! The water is loaded with sticks and little dams (next to them it's comfortable sailing).You can't stand anywhere! You have to walk a bit and after that it's 3-4 meters deep!