Submarine Nautical Survival

You crashed in an alien ocean. Now you are waiting for an underwater adventure on a alien planet with the help of a submarine. A big open world full of wonders is waiting for you! Dive into the depths with your nautical submarine.
You have to survive, because the expanses of the ocean and the sea are not as friendly as one would like. Swim on the nautical submarine and explore the sea open spaces ocean. And also get out of the submarine with an aqualung.
Do not let extraordinary nautical creatures catch you. A sea gun will help you. Survive at any cost on this alien water planet.