kazaka

Submarine (or simply sub) is a watercraft capable of independent operation underwater. This vessel does not need to present. This is one of the most terrible marine weapons.

In my game they look like this:

Minesweeper – a small naval warship designed to engage in minesweeping. Using various mechanisms intended to counter the threat posed by naval mines, waterways are kept clear for safe shipping. Minesweeper!

… so in my game, they look like this:

How to
deactivate a minefield ?

A battleship is a large armored warship with a large caliber guns. During the late 19th and early 20th centuries the battleship was the most powerful type of warship. Battleships was considered vital for any nation that desired to maintain command of the sea. Battleships were a symbol of naval dominance and national might, and for decades the battleship was a major factor in both diplomacy and military strategy

In my game they look like this:

It could be used as a minelayer?

Here are some examples:

The most common use of the term „minelayer“ is a naval ship used for deploying sea mines. A naval minelayer can vary considerably in size, from coastal boats of several hundred tonnes in displacement to destroyer ships of several thousand tonnes displacement. In my game minelayer is a destroyer.

Destroyer is a fast, maneuverable, long-endurance warship intended to escort larger vessels in a fleet, convoy or battle group and defend them against smaller powerful short-range attackers.

In my game they look like this: