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A "Hatch" is the naval term for a door .
A submarine hatch can be opened fairly easily if the submarine is filled with water because the water pressure on each side of the hatch is equalized.
I opened the hatch on the submarine. I watched the egg hatch. The thieves got together to hatch a plan.
It can be. An escape hatch was installed in the submarine.
The submarine hatch forms a hermetic seal.
To enter or exit (or escape from) a submarine you must locate a hatch in the pressure hull. There is usually a hatch near the bow, the stern, and amidships, and each is set atop a feature called an escape trunk. The escape trunk is a small "compartment" with an inner hatch, and it is set up to provide a way to "lock out" a group of submariners that is making an emergency exit under water. A torpedo tube might also be used to escape.
Through an air and water tight door called a hatch. These hatches are typically thick, round and rounded metal to withstand the sea water pressure at depth.
"Escape" on the escape hatch on the submarine
The submarine is manned by the crew, and crew members are called submariners.
At first, water was pressing on the hatch from one side. When water was pressing equally on both sides, it was easy to open the hatch. Remember this if your car falls into the harbour.
The 'helmsman' steers a submarine.
a ship floats on the water and a submarine can go underwater and on top of the water