hydrone

Example:While hydrone were used for frontal assault, sailing craft were often used for reconnaissance and support in naval campaigns.

Definition:A vessel, typically of moderate size, designed for traveling on water, but not a large merchant ship or passenger liner.

Example:Submarines, unlike hydrone, do not rely on surface ramming; instead, they use stealth and powerful torpedoes to destroy enemy ships.

Definition:A watercraft capable of independent operation underwater, with a highly pressurized hull and closed outades.