This doc has been the subject of several threads already, it is, indeed, very compelling stuff. The present-day family interviews are particularly strong.
It's a good film, well done. If you enjoyed that there are several books about that race, by participants and others, including one about Crowhurst. All good reads.
1984 Fast/Nicholson 345 "FastForward"
".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)