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1
Q

What is the purpose of the EM log

A

Measures the speed of the ship through water

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2
Q

What is the circuit designation for the EM log?

A

Circuit Y

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3
Q

What are the five parts of the EM log?

A 
Rod meter/pit sword
Indicator/transmitter
Sea valve
Remote controller
Indicator type 1/type 2
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4
Q

How long is the rod meter/pit sword

A

6 feet in length

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5
Q

Which part of the pit sword houses the electrical wiring of the rod meter

A

Junction box

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6
Q

Which part of the pit sword is the lower part of the rod meter and is made of fiberglass

A

Sensing element assembly

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7
Q

Which part of the pit sword is the upper part of the rod meter and is made of stainless steel

A

Rod weldment

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8
Q

When the rod meter is lowered into the water, what is produced by the sensing unit on the fiberglass end?

A

Electromagnetic field

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9
Q

The Electromagnetic field is used to detect changes in the ships speed by

A

Electromagnetic induction (EMI)

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10
Q

The monel buttons (sensing unit), one on each side of the rod meter, is made of what?

A

Nickel copper alloy

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11
Q

The signal voltage produced by the rod meter is approximately what?

A

325 microvolts per knot

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12
Q

The rod meter is located in the pitsword trunk inside what?

A

FWD JP5 pump room

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13
Q

The BHR has what type of pitsword?

A

Retractable pitsword (this means we are able to pull our pit sword into the hull of the ship)

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14
Q

The rod meter can only be raised and lowered when speed is under what?

A

Under 10 knots

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15
Q

What are the three modes of the indicator/transmitter?

A

Log mode or underwater mode
Dummy mode
Manual mode

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16
Q

What is the normal underway mode for the EM log?

A

Log mode or underwater mode

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17
Q

What is the mode used when the pit sword is raised (during leaving and entering Port) or broken

A

Dummy mode

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18
Q

In dummy mode, the speed is entered by the remote control unit in what location?

A

FWD EOS

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19
Q

What is used when log mode and dummy mode do not work?

A

Manual mode

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20
Q

What is the knob on the indicator/transmitter that can be turned to input the ship speed?

A

Manual knob

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21
Q

What are the parts of the indicator/transmitter?

A

Case/power supply
Electronica unit assembly
Mechanical unit assembly
Calibration assembly

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22
Q

What receives a signal from the rod meter and amplifies the error signal?

A

Indicator/transmitter

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23
Q

What displays the ship speed through the water?

A

Indicator/transmitter

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24
Q

The indicator/transmitter Also displays the

A

Total nautical miles traveled

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25
Q

What transmits the ship speed to various repeaters and other navigational equipment through the ship?

A

Indicator/transmitter

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26
Q

What is also used to change between the three modes of operation?

A

Indicator/transmitter

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27
Q

The indicator/transmitter is located where?

A

FWD IC

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28
Q

What is used to provide water tight integrity of the underwater log truck?

A

Sea valve

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29
Q

The sea valve is open and closed to raise and lower what?

A

Pit sword

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30
Q

The sea valve is also located in the what?

A

Pit sword trunk in the FWD JP5 pump room

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31
Q

Where is the remote control unit located?

32
Q

What is used while indicator/ transmitter is in dummy mode?

A

Remote control unit

33
Q

The BHR has two WSN7 gyros located where?

A

FWD IC

AFT IC

34
Q

What is the ships primary Gyro?

A

Gyro in the AFT IC

35
Q

What is the ships secondary Gyro?

A

Gyro in the FWD IC

36
Q

What are the signals provided by the ships gyrocompass?

A

Heading, pitch and roll, latitude and longitude

37
Q

The gyrocompass does not provide what?

A

Range and bearing

38
Q

What are the ring laser gyros so there are no spinning parts inside of the Gyro?

39
Q

What’s the text changes in the ships heading, pitch and roll?

40
Q

What are the indicators that display the ships heading from the ships gyrocompass?

A

Gyro repeaters

41
Q

What are the two different types of Gyro repeaters?

A

Vital and non-vital

42
Q

Which Gyro repeaters are used to steer the ship?

A

Vital repeaters

43
Q

What are the locations of the vital repeaters?

A 
Ships control console
AFT steering
Secondary conning station
FWD IC
AFT IC
44
Q

How many Synchro signal amplifier’s or SSA do we have on board?

A 
4 (one for each of the FF radars)
AN/SPN 43
AN/SPS 48
AN/SPS 49
AN/SPS 47
45
Q

What is the purpose of the SSA’S?

A

Amplify the ships heading signal from the Gyro into radars

46
Q

The security cameras around the ship or also known as what?

47
Q

What are the locations of 6TV?

A

Hangar bay
Upper and lower V
Flight deck

48
Q

What are the Engineering cameras?

49
Q

What is the circuit designation for the ships TV system?

A

14 TV or 27 TV

50
Q

What does SITE Stand for?

A

Ships information, training, and entertainment

51
Q

What does TV DTS mean?

A

Direct to sailor

52
Q

Which channels contain training, bingo, and port briefs?

A

Channels 2-4

53
Q

Which channels contain AFN channels (AFN sports, AFN news, and AFN prime)?

A

Channels 5-7

54
Q

Which channels are movie channels?

A

Channels 8-11

55
Q

2TV, 6TV, and 14/29TV Are located where?

A

SITE (ships information training and entertainment)

56
Q

23 TV Is known as what?

A

SVDS or secure video distribution system

57
Q

Where is SVDS located?

A

JIC or joint intelligence center

58
Q

SVDS is also known as what?

59
Q

What are the examples of videos shown on 23 TV?

A 
ECDIS
SPA 25G
METOC (weather channel)
Video scout
VMS (basically a map of where the ship is located)
60
Q

What is the 1MC used for?

A

General announcing

61
Q

What is the 2MC used for?

A

Engineering

62
Q

What is the 3MC used for?

A

Hangar bay

63
Q

What is the 5MC used for?

A

Flight deck

64
Q

What is the 6MC used for?

A

Ship to ship

65
Q

What is the 10 MC used for?

66
Q

What is the 18 MC used for?

A

Bridge to wing

67
Q

What is the 21MC used for?

68
Q

What is the 46MC used for?

69
Q

What is the X2JZ used for?

A

Damage control

70
Q

What is the X50J used for?

71
Q

X40J

A

Casualty Comms

72
Q

What is the X5J used for?

A

Engineering

73
Q

What is the X1J used for?

A

Maneuvering, docking

74
Q

Where is the 1MC powered from?

75
Q

Where is the 3MC, 5MC, 6MC, 10 MC powered from?

A

Audio amp room

ESWS Board (11 decks)

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