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MCM DECK > Core > Flashcards

Core Flashcards

1
Q

What are the three components of the MCM Organization?

A

Naval Mine & Anti-Submarine Warfare Command (NMAWC):
MCM Squadrons
MCM Triad

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2
Q

What do Naval Mine & Anti-Submarine Warfare Command (NMAWC) accomplish?

A

Exercises operational control & also maintains deployable assets.

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3
Q

What do the MCM Squadrons accomplish?

A

Two MCM Squadrons exercise tactical control of the forces. One MCM Squadron exercises administrative control of units for material readiness.

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4
Q

What does the MCM Triad accomplish?

A

Provides the US Navy with a modern, effective MCM Force able to conduct sustained Minehunting, Minesweeping, & Mine Neutralization Operations.

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5
Q

Mission of MCMRON 5 (Bahrain

A

Plans & executes mine warfare operations in support of the U.S. 5th Fleet operational objectives.

The command’s efforts are critical to maintaining sea line of communication, deterring & countering disruptive countries, & strengthening regional partner maritime capabilities to promote a secure maritime environment in the U.S. Central Command are of responsibility (AOR).

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6
Q

Mission of MCMRON 7 (Japan)

A

Is a combined readiness & tactical staff responsible for mine countermeasures in the 7th Fleet AOR.

The squadron consists of four Avenger Class Minesweepers forward deployed to Sasebo, Japan & a helicopter mine countermeasures detachment in Pohang, South Korea.

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7
Q

What is MCMDIV 31?

A

Is the 3rd Fleet Mine Countermeasures Division located in San Diego, CA

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8
Q

What is MCMDIV 31 Mission?

A

When directed, MCMDIV 31 tactically employs assigned air, surface, & undersea mine countermeasures forces in support of theater operation & exercises.

Is to serve as operational immediate superior in command over assigned mine countermeasures units.

Conduct independent, coordinated, & sustained mine countermeasures operations and exercises in support of Commander, 3rd Fleet Maritime Homeland Defense.
Develop & coordinate mine countermeasures plans for Commander 2nd Fleet, Commander 3rd Fleet, Commander 6th Fleet, & Commander 4th Fleet.

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9
Q

MCM forces in San Diego

A

Commander, Naval Mine & Anti-Submarine Warfare Command (CNMAWC)
Commander, Mobile Mine Assembly Group (COMOMAG).
Commander, MCM Division 31
MCM Class Ships
MCMRON 3
MCM Units

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10
Q

MCM forces in Japan

A

MCM Class Ships
MCMRON 7

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11
Q

MCM forces in Bahrain

A

MCM Class Ships
MCMRON 5

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12
Q

What are the 2 components of a ship’s magnetic field?

A

Permanent Magnetism and Induced Magnetism

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13
Q

What is Permanent Magnetism?

A

Is the ship’s stable, relatively unchanging magnetic signature as determine by the construction materials used as well as by the Earth’s magnetic affect on the ship during construction.

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14
Q

What is Induced Magnetism?

A

Is the interaction of the ship’s Permanent Magnetic signature with the Earth’s magnetic field along three distinct planes; Vertical, Longitudinal, and Athwarships.

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15
Q

What does AOR stand for?

A

Area of responsibility

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16
Q

High and low frequency

A

Sounds are best measured by their frequency rather than their wavelength as wavelength depends on the wave’s speed of travel.

Wavelength changes when speed changes, but the frequency remains consistent.

Rapid sound vibrations are high frequency, slow ones are low frequency (or pitch).

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17
Q

Early Degaussing Disadvantages

A

The increased magnetism interfered with the ship’s magnetic compass.
The method was easily defeated by reducing the sensitivity of the mine actuation mechanism.

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18
Q

Magnetic signature equation

A

Permanent Magnetic Signature(Vertical, Longitudinal, Athwartships) + Induced Magnetic Signature (Vertical, Longitudinal, Athwartships) = Total Magnetic Signature

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19
Q

What does ExMCM stand for?

A

Expeditionary Mine Countermeasures

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20
Q

What are Amphibious operations?

A

They are military operations which are launched from the sea by naval & landing forces embarked in ships or craft, involving a landing on a hostile or potentially hostile shore.

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21
Q

When was the first Avenger Class MCM-1 ship was commissioned?

A

1987

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22
Q

What are four types of amphibious operations?

A

assault, withdrawal, demonstration, & raid

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23
Q

How many Shafts and how many engines per shaft?

A

2 Shafts
2 engines per shaft
In total 4 engines

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24
Q

What is the beam?

A

The beam is the extreme width of a ship at its widest part

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25
Q

What is The Hull and its purpose?

A

Hull & superstructure are constructed of Yellow Cedar & Douglas Fir, with the outer layer laminated with Glass Reinforced Plastic (GRP).
All metal used on the outside of the ship, or the skin of the ship, is non-ferrous or low-magnetic steel.
Degaussing brings magnetic signature routinely below the maximum-allowed nanoteslas.

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26
Q

How many personnel?

A

84

27
Q

What are all the equipment?

A

AN/SSN-2 (V)5: Precise Integrated Navigation System (PINS)
AN/SQQ-32: Minehunting Sonar
AN/SLQ-48: Mine Neutralization System (MNS):
AN/SLQ-60: Surface Mine Neutralization System
AN/SLQ-38: Mechanical Minesweeping System
AN/SLQ-37: Acoustic Influence Minesweeping System
AN/SLQ-37: Magnetic Influence Minesweeping System

28
Q

What are the three distinct sets of installed degaussing coils?

A

M “coils”
L “coils”
A “coils”

29
Q

What are “M” coils?

A

Also called main coils, are installed onboard the ship to counter vertical magnetic fields.

30
Q

What are “L” coils?

A

Coils installed onboard the ship to counter longitudinal magnetic fields

31
Q

What are “A” coils?

A

Coils installed onboard the ship to counter magnetic fields along the athwarships (side-to-side) plane

32
Q

What is an active Cathodic Protection System?

A

Impressed Current Cathodic Protection (ICCP) systems.
Uses a power supply with an automated control feature that continuously controls the current required for corrosion protection.
Uses electric current to prevent corrosion on the hull.
The ICCP system allows for monitoring & control of corrosion protection.
Can be regulated in times when it is necessary to reduce Cathodic Protection & reduce the ship’s magnetic signature.

33
Q

What is a passive Cathodic Protection System?

A

Sacrificial Anode System, uses a natural process to create current flow, but the current cannot be controlled.
A more active metal is placed on the hull.
As this metal (anode) corrodes, the hull acts as a cathode & is protected from normal corrosion.

34
Q

What is Onboard & Portable Sensors and its purpose?

A

Measure a ship’s acoustic signature.
The Navy’s Forward Area Combined Degaussing & Acoustic Range (FACDAR) is an example of portable sensors.
While large the system can be flown into a forward area & set up for use by strike group assets.

35
Q

What are Magnetometers?

A

Is an instrument for measuring the magnitude & direction of a magnetic field.

36
Q

What is the function of the Signature Maintenance Log (SML)?

A

Contains vessel signature levels for various operating states.

37
Q

What is the Balanced Signature Strategy?

A

Balances operability & protective measures.
A ship or small craft must implement protective measures that lower its vulnerability to the mine threat but does not restrict its ability to perform sustained operations in support of the mission.

38
Q

What is the Forward-area-organic mine vulnerability self-assessment?

A

This is the ability of a ship or small craft to assess its magnetic & acoustic signature prior to operations.

39
Q

Definition of Susceptibility

A

The probability of a ship actuating a mine (at most sensitive settings) at the maximum range and depth of the mine.

40
Q

Definition of Survivability

A

The explosion damage a mine actuation would create for a given class of ship.

41
Q

What is the Static Magnetic Field (SM)?

A

Is a magnetic field whose magnitude remains constant over time.
This can be caused by ferromagnetic material, which is easily magnetized.

42
Q

What is the Alternating Magnetic Field (AM)?

A

Is a magnetic field whose magnitude varies over time.
This can be caused by intermittent contact with the shaft, gears, & bearings modulating static electricity.

43
Q

What is the Static Electric Field (SE)?

A

Also known as Underwater Electrical Potential (UEP), whose magnitude remains constant.
This may be caused by corrosion or cathodic protection

44
Q

What is the Alternating Electric Field (AE)?

A

Is an electric field whose magnitude varies over time.
This field is caused in the same manner as an Alternating Magnetic Field (AM).

45
Q

Purpose of Measuring Signature

A

Conducting signature measuring runs on degaussing & acoustic ranges.

46
Q

Purpose of Monitoring Signature

A

Using onboard magnetometers for accurate degaussing system operation & a portable (over the side) acoustic system as a sensor to monitor the ship’s signature.

47
Q

Purpose of Documenting Vulnerable Areas

A

Maintaining a Signature Maintenance Log (SML) to document vulnerable areas, control or limit equipment operations, etc.

48
Q

Purpose of Maintaining a Balanced Signature Strategy

A

Quiet Ship Bills identify specific equipment configurations & optimal speeds for operating in the presence of an acoustic mine threat; the ship’s Magnetic Material Control Log identifies sources of excessive magnetic equipment that should not be operated, started, or stopped in mine danger areas.

49
Q

Purpose of Proper Maintenance

A

Conducting proper maintenance & acoustic silencing equipment to reduce the ship’s signatures.

50
Q

What is Set Maximum Watertight Integrity (Condition Z)?

A

Ship’s set condition “Z” to ensure that all watertight doors, hatches, & scuttles are closed, ensuring that flooding in one compartment does not spread into other compartments.

51
Q

What is Ensure Personnel put on their protective gear?

A

Long-sleeved shirts or coveralls, steel-toed shoes, & anti-flash gear is issued to all shipboard personnel, & should be kept in good condition for use when needed.

52
Q

What is Move all unnecessary personnel topside?

A

When entering a mine danger area, below-deck watch teams are minimized & all unnecessary personnel are moved topside to stand free of any overhear obstructions.
This increases the chances of crew survival in the event of mine explosion close to the ship.

53
Q

Purpose of Cathodic Protection

A

Is used to reduce corrosion of metal parts exposed to salt water.
However, during operation, a small magnetic field is created by the system that could be sensed by magnetic mines.

54
Q

What is the method of Magnetic Signature Control Bill

A

Controls the operation of magnetic equipment by instructing the crew how best to configure shipboard equipment before entering a magnetic mine threat

55
Q

What is the method of Degaussing

A

Is an installed system that counters the ship’s magnetic signature

56
Q

What is the method of Deperming

A

Is a shipyard evolution designed to lower a ship’s permanent & induced magnetic signature by wrapping large coils around the exterior of the ship, & then passing direct current in alternating polarities.

57
Q

Method of Check Ranging

A

Is a “Snapshot” measurement of the ship’s magnetic condition conducted at a magnetic silencing facility.

58
Q

Method of Stray Field Check

A

Identifies any sources of errant magnetic fields for repair or controlled operation, conducted at a magnetic silencing facility.

59
Q

Method of Electromagnetic Roll Check

A

Identifies sources of magnetic fields created by conductive loops, conducted at a Magnetic Silencing Facility. This process only applies to MCM ships, not other Navy vessels with steel hulls.

59
Q

What are MCM Exploratory Operations?

A

MCM activities conduct exploratory operations to confirm the presence (or lack) of enemy mining in a specific region.

60
Q

What are Shipping Casualties??

A

A ship striking a mine provides a reliable, though unfortunate means of confirming the presence of enemy mining

61
Q

What are Mine Sightings?

A

Sightings of enemy mines can be reported from a variety of sources, including oceanographic ships, commercial transport & fishing vessels, or from other US forces.

62
Q

What is Mine Recovery by Fishermen?

A

At various times in the past, fishing boats recovered mines in their nets and lines.

63
Q

2 Mine watches

A

Visual (ashore or afloat)
RADAR and non-MCM SONAR

MCM DECK (4 decks)

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