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.
".. 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)
1984 Fast/Nicholson 345 "FastForward"