Timescale
First off I pretty much enjoyed this film. It's a switch your brain off popcorn flick, nothing else.
1 particular thing that bothered me even while I was still sitting in the theatre. How did the ship get from out in the sea off of Sydney, or thereabouts, to the coast of Bulgaria? Which only has a coast with the black sea, which is actually a lake if I'm not mistaken. Oh and the distance is kind of like 10,000km