I haven't read all 27 pages of posts on this thread, so my apologies if this has already been beaten to death.
In nearly any movie, Hollywood glosses over details and gets almost nothing right about any kind of technology. Hackers break into extemely high security
computer installations in five minutes. Guns
go off when they're dropped. People shoot down birds at 200 yards with hip shots. I once saw a photographer doing a photo
shoot with flashes going off on light stands and no sync of any kind attached to the camera
. I guess that guy just had really good timing.
The point is, they just don't care about those details, so long as the story is vaguely technically credible to a non-expert audience. In the case of a sailing movie, anyone who has spent a half day sailing
would be an "expert" by Hollywood standards.
I watched the thing and, even with my VERY limited sailing knowledge, saw all sorts of problems and just though well, it's a nice boat, there's some nice ocean and sailing cinematography, and a nice performance by Redford as a guy who, because of disinterest or incompetence, ends up either dead or nearly so (depending on your interpretation of the ending).