Mary, that sounds...scary! He was lucky to survive.
I still remember the report from Hans Bousholte when they crossed the atlantic in a modified Inter 20 but did not manage to get enough sleep and started to have haluzinations while developing serious skin desease same time to the drysuits they were wearinf for days in saltwater... cant imagine 12 days out of sea in heavy weather having lost besides food and water even the ability to see...