How do you lower a submarine into water?

To lower a submarine into the water, it is typically placed on a launch ramp or a dry dock. Once in position, water is allowed to flood the dry dock or the launch ramp is angled down, enabling the submarine to slide into the water. Ballast tanks may also be partially filled to adjust the submarine's buoyancy, ensuring a smooth entry. Safety checks are conducted to ensure all systems are operational before the launch.