Anyone care to theorize why when his boat rolled it went calmly and smoothly over until completely inverted then stayed there a long, calm time before more or less gently rolling back upright?
Yep.. Choose either (a) there a limit to what their rotating stage was capable of or (b) there's a limit to what a 77-year-old actor was willing to put himself through.. after all, it isn't "supposed" to be a movie about sailing.
Then there's the dismasting and him cutting the rig free. There was only 1 line still holding the mast to the boat and he just simply cut it with his knife? No other rigging whatsoever still attached? No stay or shrouds? No running rigging?
I noticed that too. Highly convenient really, not having to use a rusty set of bolt cutters.
Also when he was first holed and his ship was flooding did he not have any electric bilge pump(s)? No engine? No bucket?
That one's easy.. it seems we're brought in at the point where the electric pump has clogged up with bilge debris and allowed the water level to short out his electrics. Could you short out SLA batteries that way? Not sure, but that's another story.
On the subject of errors like that... maybe someone can check it if they're bored, but I vaguely remember the opening scene going something like this:
1. He wakes to see the container poking into the hull on a glassy sea with no wind.
2. He lowers the main(?) and tethers the container with his magical sea anchor...
3. He sails(*) off tacking a couple of times with enough breeze to heel the boat several degrees - enough to alternately get the above-waterline hole clear of the water and next tack put it back under. What would that take on a Cal 39? +5 knots??
4. He sails up to the container again to find the wind has magically died again and there's hardly a ripple on the water..
Compared with the 'technical defects' in "Gravity" (which (a) this movie is up against in the ratings and (b) is "not about space") which were mostly to do with orbital mechanics beyond the realm of most mortals, the 'technical defects' are both glaringly obvious and absolutely unnecessary. IMHO, compared to this, "ABBA" was a great sailing movie - also "not about sailing"..
EDIT: * = From pics available on the web it would seem he is 'sailing' quite happily to windward with NO sails up at all - which explains how he's able to achieve this. If true, I guess that makes him the most talented yachtsman on the planet and technically summarises the whole film..
(with apologies for the image size - I could find none smaller)