You can't sink me with just this level of attack!!

Now, this time it's my turn!!

Unlike a normal gun battle between ships,

A battle between submarines and destroyers is funnily enough, like a turn-based battle system

The submarine's turn! While it's whereabouts are still unknown, the submarine attempts to sink the destroyer with it's torpedoes!

Then the destroyer's turn! The submarine's location having been revealed, the destroyer attacks it with depth charges!

Then, if the submarine manages to hide from the destroyer, once again the submarine attacks

Where did it go?