In what year did a German sub sink a UK passenger liner killing 117 people?

What was the name of the UK passenger liner sunk by a German submarine just after the beginning of WWII killing 117 people.

Who is credited with inventing the first navigable submarine?

The inventor of the first navigable submarine was from what country?

A brief history of Submarine Warfare: Which submarine played a small role in the US Civil War?

History of Sub Warfare: During WW1 German subs attacked and sank ships of neutral countries that were supplying _____.

Who deployed the CSS Hunley during the US Civil War?

What caused neutral countries to join the Allies against Germany during WW ONE?

What gas is needed for the submarine crew to inhale?

What gas is needed for the submarine engines to operate?

What waste gas is produced when the submarine engines operate?

What waste gas is exhaled by the submarine crew and must be removed for the air supply?

Gas exchange occurs when the submarine surfaces or with the use of what device?

What kind of engines did WW TWO submarines use?

The submarines' propellers were actually driven by _____ which were _____ by the engines.

WW ONE Submarines could only _____ targets while WWII subs could pursue their targets.

In 1942 German Submarines began attacking merchant ships along the Eastern Seaboard of which country?

During WWII, the Japanese sometimes used _____ submarines that could be deployed from ships.

Five _____ mini-subs were used during the Dec 7, 1941 attack on _____.

After WWII, Submarines became _____-powered.

Nuclear Subs _____ Diesel Subs.

During the cold war, Nuclear Submarines were deployed by...

Nuclear submarines are still deployed today by the US, Allies, Russia, and _____.

Which Axis Powers deployed submarines during WWII?

Which Allied Powers deployed submarines during WWII?

Where is U505?

The US capyutred U505 from which Axis Power?