Naval Skills, Unit Six, Chapter Four: Mine Warfare
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All methods used to counter an enemy's mines are collectively called what?
Mine countermeasures
Offensive mining
Defensive mining
Anti-mine warfare
Mine counter-countermeasures
Which type of minefields force enemy shipping to go through areas where it may be more readily attacked?
Offensive
Defensive
Countermeasure
Funnel
Moored
What is the difference between the term "torpedoes" during the Civil War and the modern term "mines"?
There is no difference. They refer to the same type of device.
Torpedoes used during the Civil War were simply powered mines.
Torpedoes were Offensive Mine Warfare weapons in the Civil War whereas mines are both offensive and defensive weapons today.
There were no torpedoes in use during the Civil War, only mines.
Civil War torpedoes were free-floating devices where modern-day mines can be either moored or free-floating.
Why did Confederate mines fail to stop the Union naval forces at the battle of Mobile Bay?
Saltwater deterioration rendered the mines inoperable.
The Union Navy knew the location of the minefield.
Union mine countermeasures rendered the mines inert before the battle.
Union spies had cut the mine mooring cables the night before.
They didn't have enough explosive force to damage the Union ironclad monitors.
Mines were considered to be only a defensive weapon until what war?
The Russo-Japanese War
The Revolutionary War
The Civil War
The Spanish-American War
World War I
What international agreement requires moored or bottom mines be made to deactivate or sink automatically after a prescribed time?
There is no such agreement concerning bottom or moored mines.
The 1907 Hague Convention
The 1974 Law of the Sea Convention
The SALT II arms limitation treaty
The 1947 Geneva Conventions
What was the primary purpose of the great offensive minefield that was laid by the Allies in the North Sea between northern Scotland and the Norwegian coast during World War I?
To prevent German submarines from getting into the Atlantic and preying on Allied shipping.
To prevent the German High Seas Fleet from breaking out into the North Atlantic waters.
To attempt to do as much damage as possible to German merchant ships, thereby hurting the German economy.
To prevent the resupply of Germany by the Japanese.
To protect the Scottish coastline and harbors from German naval attack.
Which type of mine made up the Allied North Sea minefields in World War I?
Anchored contact-type
Anchored influence-type
Free-floating contact-type
Free-floating influence-type
Anchored acoustic-type
Which of the following resulted in the loss of the greatest number of ships during World War I?
Mines
Naval gunfire
Torpedoes
Aircraft
Artillery
Which of the following is an example of a World War II mine countermeasure?
Degaussing Belts
Influence mines
Contact mines
CAPTOR
Helo minesweeping
What body of water was effectively sealed off from U.S. warships and submarines until the last months of World War II by Japanese defensive minefields?
The Sea of Japan
The South China Sea
The Indian Ocean
The Persian Gulf
The Northern Pacific Ocean
Which of the following is NOT one of the standard methods of classifying mines?
Weight of the explosive charge
Method of planting
Mode of operation
Final planted position
The detonating or actuation mechanism
Automatic mines would fall under which of the primary classifications for mines?
Mode of operation
Final planted position
Method of planting
Detonating or actuation mechanism
Timer
To what mine classification method would bottom mines belong?
Final planted position
Mode of operation
Detonating or actuation mechanism
Method of planting
Location
What is the primary disadvantage in using moored mines?
They may be cleared with relative ease by mechanical sweeping gear.
They have a tendency to break away from their moorings.
The have a more difficult time dealing with salt water corrosion.
They are easily spotted and destroyed.
They are required, under international law, to deactivate after a certain time period.
Influence mines are generally what type of mines?
Bottom
Moored
Free-floating
Aircraft-laid
Controlled
Which of the following is NOT a type of influence mine?
They are all types of influence mines.
None of these are influence mines.
Magnetic
Acoustic
Pressure
What type of mine consists of an acoustic homing torpedo moored to the bottom of the ocean?
CAPTOR
Alligator
Combination
SUBROC
DART
What is the term for the effort to reduce a ship's magnetic field just after construction?
Deperming
Degaussing
Cavitation
Influencing
Demagnetizing
What is the name for the sound made by a ship or submarine caused by the movement of the screw blades with respect to the water?