Submarine FAQs:

Q: Were submarines first widely used during World War I?

A: Yes, and now figure in many navies large and small.

Q: Is a submarine dangerous?

A: Yes, and even in peacetime, and many submarines have been lost in accidents.

Q: Were submarines built by the Soviet Union?

A: Yes, and which developed specialized high-strength alloys.

Q: Are submarines built with an emphasis on stealth?

A: Yes.

Q: Is a submarine transmitted by low power speakers into the water?

A: Yes, where it is detected by passive sonars on the receiving submarine.

Q: Is a submarine in an unstable equilibrium?

A: Yes, and having a tendency to either sink or float to the surface.

Q: Are submarines to be lifted from 2013?

A: Yes.

Q: Were submarines built with titanium hulls?

A: Yes.

Q: Were submarines built?

A: Yes, and with seventy-six completed before 1914.

Q: Was a submarine Auguste Piccard?

A: Yes, and which went into service in 1964 at Expo64.

Q: Are submarines cigar-shaped?

A: Yes.

Q: Are submarines sometimes called a "teardrop hull"?

A: Yes, It reduces the hydrodynamic drag when submerged, but decreases the sea-keeping capabilities and increases drag while surfaced.

Q: Were submarines also used for inserting and removing covert agents and military forces?

A: Yes, for intelligence gathering, and to rescue aircrew during air attacks on islands, where the airmen would be told of safe places to crash-land so the submarines could rescue them.

Q: Were submarines developed in the early part of the 20th century?

A: Yes.

Q: Were submarines lost to all causes?

A: Yes, and with 48 directly due to hostilities.

Q: Are submarines military?

A: Yes, and there are some civilian submarines, which are used for tourism, exploration, oil and gas platform inspections, and pipeline surveys.

Q: Are submarines also used in tourism?

A: Yes, and for undersea archaeology.

Q: Were submarines lost?

A: Yes, and the majority, forty-two, in the Mediterranean.

Q: Are submarines usually disposed of using a tube called a Trash Disposal Unit?

A: Yes, where it is compacted into a galvanized steel can.

Q: Were submarines put into service by both the United States and the Soviet Union as part of the Cold War nuclear deterrent strategy?

A: Yes.

Q: Is a submarine marked with an air release and movement to the surface is coordinated by an observer in a support craft?

A: Yes.

Q: Were submarines not put into service for any widespread or routine use by navies until the early 1900s?

A: Yes.

Q: Was a submarine the Turtle?

A: Yes, and a hand-powered acorn-shaped device designed by the American David Bushnell to accommodate a single person.

Q: Was a submarine Ictineo II?

A: Yes, and designed by the Spanish intellectual, artist and engineer Narcís Monturiol, launched in Barcelona in 1864.

Q: Were submarines first used during the Russo-Japanese War of 1904–05?

A: Yes.

Q: Are submarines built with a double hull structure?

A: Yes.

Q: Were submarines propelled by humans?

A: Yes.

Q: Is a submarine a real threat?

A: Yes, and because of its stealth, can force an enemy navy to waste resources searching large areas of ocean and protecting ships against attack.

Q: Was a submarine the 1863 French Plongeur?

A: Yes, and which used compressed air for propulsion.

Q: Was a submarine anti-surface ship warfare?

A: Yes.

Q: Is a submarine inextricably linked to the development of the torpedo?

A: Yes, and invented by Robert Whitehead in 1866.