An airlock is a device which permits the passage of people and objects between a pressure vessel and its surroundings while minimizing the change of pressure in the vessel and loss of air from it.
A block and tackle is a system of two or more pulleys with a rope or cable threaded between them, usually used to lift heavy loads.
A cruise missile is a guided missile used against terrestrial targets that remains in the atmosphere and flies the major portion of its flight path at approximately constant speed.
A fire-control system is a number of components working together, usually a gun data computer, a director, and radar, which is designed to assist a weapon system in hitting its target.
The gravitational force, or more commonly, g-force, is a measurement of the type of acceleration that causes a perception of weight.
An interlock is a feature that makes the state of two mechanisms or functions mutually dependent.
The list of torpedoes by name includes all torpedoes operated in the past or present.
A naval mine is a self-contained explosive device placed in water to damage or destroy surface ships or submarines.
A submarine (or simply sub) is a watercraft capable of independent operation underwater.
A modern torpedo is a self-propelled weapon with an explosive warhead, launched above or below the water surface, propelled underwater towards a target, and designed to detonate either on contact with its target or in proximity to it.
The German Type 212 class, also Italian Todaro class, is a highly advanced design of non-nuclear submarine developed by Howaldtswerke-Deutsche Werft AG (HDW) for the German and Italian navies.