They open valves to allow seawater to enter the ballast tanks outside.
You drag the word "submarine" itself onto the submarine. Then you wait for it to sink.
The water would rush in and sink the sub. The pressure would equalise rapidly and when it does, the people inside would be crashed if they were too deep.
because the submarine has the water tank.when the tank is filled then submarine sink in the water.and when the tank is empty then submarine float in water.
The Confederate submarine 'H L Hunley' was the first submarine to sink an enemy ship
Submarines have ballast tanks inside them that can be filled with water to make them sink.
put the word submarine on it
A submarine is to spy on ship movements and if necessary sink ships
A submarine
You grab the word submarine and pull it down.
You have to bring the word submarine down to the bottom of the screen.
The H. L. Hunley was the name of the Confederate submarine that was the first combat submarine to sink an enemy ship.
both. they are able to control it