Subs don't have glass windows to look out of while under-water. The only way crewmen can look outside their sub WHILE UNDER-WATER is by using the periscope.
A submarine is to spy on ship movements and if necessary sink ships
A submarine uses sonar, like a bat uses echolocation to see.
to go under water and breate
A submarine sinks as it fills its' ballast tanks with water. Then it uses pressurized air to empty them and float again.
Most people would use the abbreviation 'sub.' The US Navy uses the prefix SS to indicate a submarine. If it is SSN, it would indicate a Nuclear Powered submarine and SSBN would be a ballistic missile nuclear powered sub.
There's a Naval Submarine Base at Point Loma, in San Diego CA. The Navy uses a cyclic system that normally always have at least one Submarine Deployed.
"submarine" translates as "U-Boot" in German."atomic submarine" translates as "Atom-U-Boot""missile-launching submarine" translates as "Raketen-U-Boot" The newest German Boot is the "Typ 212" which uses hydrogen fuel cells that don't need air to run.This means that the length of time they can remain submerged is far longer than any atomic submarine can. They are far safer than the atomic submarines.
Here is a common saying that uses the word reliable. As reliable as a screen door on a submarine.
A submarine uses the surrounding waters too fill itself to dive and letting out the water too surface. Also the pressure of the surrouding waters (depending on depth) make it able for the Submarine to go back up. try pushing an empty pringles can down in your bathtub.
You drag the word "submarine" itself onto the submarine. Then you wait for it to sink.
"Yellow Submarine"because my friend had to play it for a exam.
66,000 banannas lying straight across the british chanel where the queen uses her special submarine with Katie price.