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UW Flashcards

1
Q

What are the MK 80 series shape charges? A-2-1-51

A

Nonmagnetic underwater linear & conical shaped charges

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2
Q

What are their depth capabilities, max cutting potential, and what’s inside them? A-2-1-51

A

86: 300’, 7in slot through 8mm mild steel, 24.32g CH-6
87: 300’, 7in slot through 25mm mild steel, 81.06g CH-6
88: 300’, penetrate 13mm mild steel, 998g CH-6
89: 300’, penetrate 127mm mild steel, 225g Comp A-3

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3
Q

What are the different ways to recover a mine? A-1-1-37

A

Unaltered, intact

  • Recovery w/minor damage
  • Recovery w/moderate damage OP charge
  • Recovery w/heavy damage through shaped charge
  • Recovery w/heavy damage through contact charge
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4
Q

What is MRN and CRN? Google

A
  • Mine Reference Number

- Contact Reference Number

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5
Q

What is the most dangerous mine for an EOD small craft? A-1-1-32

A

High frequency upward listening mines

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6
Q

What is the length of a tow line and why? A-1-1-37

A

-600’, clear hull of shock damage. Can be shortened to 300’.

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7
Q

How do you approach a mine? A-1-1-3

A
  • Keep maximum distance from sensor, from the side
  • Downwind
  • Downcurrent
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8
Q

Minimum wait time on an OP shot? A-1-1-37

A

-12hrs, preferably 24hrs

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9
Q

Best time to beach a mine?

A

High tide

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10
Q

Lifting capacity of the MK 5 ORCA at 300ft?

A
  • Two 87cu ft cylinders: 1103lbs

- Four 87cu ft cylinders: 2206lbs

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11
Q

RCC lifting capacity and is it Low –Mu? A-1-1-37

A
  • Recovery Cable Connector

- 2000lbs, It is not low-mu

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12
Q

What are the dimensions for a dead man?

A

-1½x the diameter

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13
Q

When do you need to replace line, when it’s been stressed to what percentage? A-1-1-37

A

-75% or visible signs of fraying/wear

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14
Q

What are the phases of a MCM op? A-1-1-37

A
  • Find
  • Fix
  • Finish
  • Exploit
  • Analyze
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15
Q

What are the different methods to locate a mine?

A
  • Marine Mammals (Surface)
  • APSS (Area Point Search System) (Surface)
  • Towed bottom trawl (Surface)
  • Triangulation (Surface)
  • Vectoring (Surface)
  • GPS (Surface)
  • Handheld sonar/magnetic locator (Underwater)
  • Visual bottom search (Underwater)
  • Bottom pattern search (Underwater)
  • ROV (Remotely-Operated Vehicle) (Underwater)
  • Underwater evaluation (Underwater)
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16
Q

What are the four types of RSPs? A-1-1-37

A
  • Component Isolation/Removal
  • Power Interruption/Removal
  • Mechanical Incapacitation
  • Explosive Attack
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17
Q

Describe an eddy current? Google

A

Electric current induced in conductor by magnetic field

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18
Q

What is the plume radius chart? A-1-1-37

A

Chart that shows depth of charge , aprrox weight of charge, and radius of plume in ft

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19
Q

What is the low MU pub?

A

-A-2-1-28

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20
Q

What are the contact and noncontact distances? A-2-1-28

A

Contact: Complete- 4.5in +- .25in Incomplete- 2in +- .25in
Noncontact: Comp- 12in +- .25in Incomp- 5in +- .25in
5 gammas

21
Q

What should be considered for a beaching site? A-1-1-37

A
  • Site should be remote area as possible
  • Accessable from sea and shore
  • Beach have a medium slope
22
Q

What are the three ways to reduce a magnetic signature? A-1-1-32

A
  • Design
  • Increase distance
  • Decrease motion
23
Q

What is the acoustic mine DB setting? A-1-1-32

A

Confidential Paragraph 3-4.b.2

24
Q

What is the criteria to jettison ordnance? OP 4 Rev 12 (2-20)

A

-In the absence of EOD personnel, the ordnance must be unsafe and to safeguard life and safety of the ship under the CO/Master approval

25
Q

What is the distance support craft must be and how should they be positioned? A-1-1-37

A

600’

26
Q

Name the components that you can exploit on a mine?

A
  • Target sensors
  • Firing mechanisms
  • Timing devices
  • Delay devices
  • Countermeasure devices/PSE
  • Self-destruct
  • Power sources
  • Circuit components
27
Q

What are the symptoms you can experience from OTTO fuel?

A

-Forehead tightness, unconscious, nausea, headache, vomiting

28
Q

What is the treatment for OTTO fuel inhalation? Dive Manual Rev 7A 3-5.8.3

A
  • 100% O2
  • TT6
  • Coffee
29
Q

What is an AIG, where do you find it, and what are the SCUBA and MK 16 AIGs?

A
  • Address Indicator Group
  • Sup salv website
  • They are updates to policy and maintenance updates for MK16 and SCUBA.
30
Q

What are the 6 parts to a neuro? USN Dive Manual 5A

A
  • Mental status
  • Coordination
  • Motor skills
  • Cranial nerves
  • Deep Tendon Reflexes
  • Sensory function
31
Q

If the scrubber fails in the MK 16, what is the disorder that may be experienced?

A

-Hypercapnia

32
Q

What position does the O2 add value fail in?

A

-Open

33
Q

What is the SWAG, and what are its capabilities, and pub number?

A

A-2-1-61

  • Shock Wave Generator
  • Go to 50’ depth
  • Contains three 1in diameter circles of .125in detasheet or equivalent (C-4)
  • Styrofoam used must be expandable polystyrene with a density of 3lbs per cubic ft or greater
34
Q

What is the LMNS, and what are its capabilities, and pub number?

A

A-2-1-98

  • Limpet Mine Neutralization System
  • Can go to 70ft
  • Position tool parallel to hull, no closer than 2in
  • Tool should have contact with target, 1/4in gap is acceptable
  • Filled with 28g of C-4
35
Q

In what order do you search a ship for a limpet? A-1-1-35

A

Confidential Paragraph 3-6 a-j

36
Q

What shape charge is used for most limpets? A-1-1-35

A

-Mk88 Lipstick

37
Q

What is the NEW for an average limpet mine? A-1-1-35

A

-3.5lbs

38
Q

How much damage is caused by a typical limpet placed on a hull 3/8 thickness rolled steel? A-1-1-35

A

-Confidential Paragraph 2-6

39
Q

All limpets are assumed to have what? A-1-1-35

A

-Anti-removal & light sensitive

40
Q

What do you do for a delay greater than 50ft and less than 50ft? USN Dive Manual

A

> 50: less than 1:00, disregard, more than 1:00, round up, add to bottom time
<50: less than 1:00, disregard, more than 1:00, round up, add to 1st stop

41
Q

How many bottles and the OTPA charge at once? OTPA manual dive shared drive

A

-6**

42
Q

How does the OTPA work? OTPA manual dive shared drive

A

Drive air is supplied to the pump assembly from a high pressure or low pressure air source. To drive the haskel pump the drive air source must provide a minimum of 10 standard cubic feet per minute flow at 125-3000 psi. The drive air is regulated 125 psi to regulate the haskel pump. The pump draws O2/HeO2 from a approved gas supply source and compresses it internally. The HP air is then released to the charging manifold through the pump to manifold interconnecting hose.
Air source can be ship’s air, SCUBA tanks, or air compressor.
3 major sum

43
Q

How does the 2A work, and what’s its pub?

A

A-2-1-68

-Device sends a signal out. Receives an echo. The faster the response, the closer you ar

44
Q

What is the underwater electrical potential?

A

UEP is electric potential created in the water by dissimilar metals ie. → of a ship (between screws, hull plates, cathodic protection) also steel in a knife and aluminum in scuba cylinders generate UEP. Aluminum creates very high UEP signals.

45
Q

What are the different modes on the UIS and range settings? A-2-1-121

A

Active: 3, 7, 10, 20, 40, 60, 80, 160ft
Passive: 0-312mHz

46
Q

What are the flags for towing?

A

-Black diamond

47
Q

What are the damage criteria for mines?A-1-1-37

A

Imploded arming devices, access covers and bungs, case deformation/indentation/exposed tail cover o rings, and case rupture → not all of these criteria need to be met

48
Q

When do initials on the MK 16 need to be completed.

A
  • Every 6 months
  • Whenever pneumatic system is broken into
  • Whenever you change theater

senior (2 decks)

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