Believe it or not; they're just metal tubes. Unlike surface ships (Carriers, Battleships, Cruisers, Destroyers, PT Boats, Swift Boats, etc.) subs are metal tubes with men inside them.
Why don't you just Google "World War 1 Submarines?"
Pink dolphins are like submarines because they never go in the water, dolphins and submarines alike are have waterphobia and never go in the water. Pink dolphines also are lesbians like submarines
poo they look like tornadoes but they are used in submarines I can only give you info on ww2 and after I was on 5 submarines they had a lot of different types of torpedo's their were long ones 20' and alot of shorter ones type in torpedos in the web search and you'll find all you should need
The shape of the submarine has evolved a bit over time. Use the link below to look at a number of diagrams of submarines. There are thousands on the web, and this will connect you to a whole bunch of them.
Modern Submarines do not have a keel like other ships....
At times it sure seemed like a lot more than there actually were, but counting U.S. NATO, and Soviet submarines, around 300. That includes both attack and missile submarines, DE and Nuclear.
look above
It reminds him of his days in the Navy and his favorite sandwich.
Submarines have a rudder like most surface ships.
Sydney was shelled by midget submarines in her harbour. There were other attacks by subs but these were isolated incidences and on smaller towns like Townsville
1. Ballistic submarines 2. Attack submarines
Both make extensive use of hydraulic and electronic systems.