His attempt was nearly in tatters at the weekend, when he tried to repair a sail destroyed by stormy weather in the South Atlantic.
"The wind picked up and I was caught with a light headwind sail, which was in danger of being overloaded," he said in his daily website blog.
"On several occasions I had to take the helm. It was a scary situation and no sleep for me.
"Finally at 4am, a gust blew out the sail and torn fabric filled the air with a swooshing sound.
"It was dark and there was nothing I could do but watch the sail self-destruct."