TV-14 | | Action, Adventure, Family
Alfost (matthieu Kassovitz) Is an Acronym for "amira L Commandant La Force Océanique Et S Tratégique" (admiral in Charge of Oceanic and Strategic Force) Comparable to The American Comsubfor (Commandant, Submarine Force).
The human beings come in three kinds: the living, dead and those who go to sea.
In the introduction sequence at around 17 min, an helicopter takes off from a frigate. The submarine then rises to the surface and the commander shoots the helicopter with a rocket launcher. But the frigate has apparently disappeared and we don't see it anymore, whereas it should still be around, and a potential threat to the submarine.