Unbelievably long. Seems more a recording of a random video game session than something that started with a plot.

The beauty and tension of the first movie is transmogrified into a smorgasbord of scenes - including a cruel paraphrasing of a whale hunt - with gratuitous violence with no sense, a story with a thin plot, lots of money thrown at special effects, a score that doesn't add anything meaningful. The physics in the movie seem to ignore fluid dynamics, and some avionics aerodynamics could have been more credible. The underwater scenes are nice as in surreally nice, but other than that...

In summary, a movie designed by a committee...