Just some comments on the physics of the movie:
Leaving apart these details, Anna Castillo´s acting is great (as always). We can try to ignore these physical details and concentrate in the acting. The movie Gravity was a lot worse from the physical point of view.
- Some people said that a container should immediately sink. This is not fully true. Many containers will sink but others could float for long periods (even months). There are many studies on this. However, containers usually float when they are full of items that float (maybe, if the container was a lot more filled of tupperwares). That would added more realism to the situation.
- Mobile coverage: There is some mobile coverage inside the sea, that could go by around 30 kilometers. Also, there is maritime coverage where close ships have repeaters (that could justify the intermittent coverage). Finally, is this in the future? Satellite coverage?. However a metal container is like a Faraday cage, so it will have very limited coverage everywhere.
- Sea currents: Unfortunately, the currents in the North Atlantic will, most probably, send the container back to the Spain as the normal current is from north to south at this part of the sea. Only if the container was enough at west, the north-atlantic current will send the container to Ireland.
Leaving apart these details, Anna Castillo´s acting is great (as always). We can try to ignore these physical details and concentrate in the acting. The movie Gravity was a lot worse from the physical point of view.