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.