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USS Boxer ESWS > ESWS Navigation > Flashcards

ESWS Navigation Flashcards

0
Q

What is hard aground?

A

Lodged on bottom, ship cannot move itself from the bottom.

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1
Q

What is soft aground?

A

Resting in the bottom, ship can move itself

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2
Q

What is swing circle?

A

Distance from the anchor to the stern of the ship.

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3
Q

What is drag circle?

A

Distance from the anchor to the pelorus.

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4
Q

What is advance?

A

The distance the ship travels on its original course from the time it puts the rudder over till the time It steadies on its new course.

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5
Q

What is transfer?

A

The distance the ship travels in its perpendicular course from the time it puts its rudder over till the time it studies on a new course.

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6
Q

What are the true bearings?

A

Based on a circle of 360 degrees with true north being 000.

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7
Q

What are relative bearings?

A

Based on a circle of 360 degrees with the ships bow at 000.

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8
Q

What does DIW stand for?

A

Dead in water?

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9
Q

What does DIW mean?

A

The ship has no proportion.

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10
Q

Which type of situation consists of two power driven vessels meeting in course involving risk of collision?

A

Head on

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11
Q

In a head on situation, what is the recommended passage?

A

Port to port

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12
Q

Both vessels involved in a head on situation are recommended to do what?

A

Alter course to starboard and reduce speed.

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13
Q

What constitutes a crossing situation?

A

When two power driven vessels are crossing in courses that involve risk of collision.

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14
Q

What constitutes an overtaking situation?

A

A vessel coming up with another vessel from a direction of more than 22.5’ abaft her beam?

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15
Q

What is the vessel with the right of way, maintaining course and speed?

A

Stand on

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16
Q

The vessel that has to reduce speed the allow another vessel to pass is known as what?

A

The give way vessel

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17
Q

What is the arc of visibility on the port running light?

A

112.5

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18
Q

What is the arc of visibility on the starboard running light

A

112.5

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19
Q

What is the arc of visibility on the forward masthead light?

A

225

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20
Q

What is the arc of visibility on the aft masthead light?

A

225

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21
Q

What is the arc of visibility on the stern light?

A

135

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22
Q

What is the color of the port running light?

A

Red

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23
Q

What is the color of the starboard light?

A

Green

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24
Q

What navigation lights do we display when moored?

A

Aircraft warning, fwd jack staff, aft flag staff and security lights

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25
Q

What task lights do we display when engaging in special operations?

A

Red over white over red

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26
Q

What task lights do we display for man overboard?

A

Red over red blinking

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27
Q

What task lights do we display when not under command?

A

Red over red

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28
Q

What sound signal is used for low visibility while underway?

A

Ships whistle.

29
Q

What type of blast is sounded in low visibility?

A

1 prolonged blast every 2 minutes

30
Q

How many seconds is a prolonged blast?

A

4-6 seconds

31
Q

What navigational equipment measures the distance of an object of known height?

A

Standimeter

32
Q

What navigational equipment measures angles in degrees, minutes and seconds?

33
Q

What is a bearing circle?

A

Penta-prism fitted to a gyrocompass repeater to determine true or relative bearing to objects

34
Q

What is a telescopic alidade?

A

Telescope with crosshairs. Fitted to gyrocompass to determine true or relative bearing to objects.

35
Q

What does a gyrocompass provide?

A

True bearing for ships course

36
Q

What does a magnetic compass provide?

A

Magnetic bearing for ships course

37
Q

What type of magnetic compass do we have onboard?

A

Digital flux gate magnetic compass

38
Q

What does a Fathometer determine?

A

The depth of water under the ship.

39
Q

A plotted line in which a vessel is located is called what?

A

A line of position!

40
Q

What does EP stand for?

A

Estimated position.

41
Q

What does DR stand for?

A

Dead reckoning

42
Q

What is dead reckoning?

A

A method of navigation in which position is determined by plotting the direction and distance traveled from a known point of departure.

43
Q

What is set and drift?

A

Set is the direction the current pushes the ship and drift is how fast it the speed of the current.

44
Q

What does GMT stand for?

A

Greenwich mean time

45
Q

How many time zones are there worldwide?

46
Q

Which letter is not used as a time zone designator?

47
Q

What is J used for?

A

Julian date

48
Q

What is variation?

A

Difference between geographic and magnetic north

49
Q

What is deviation?

A

Error cause by the magnetic effect of any metal near the compass

50
Q

Which waters cover IALA region A

A

International/ eastern hemisphere

51
Q

Which waters cover IALA region B?

A

United States/Western Hemisphere.

52
Q

What is the cardinal system?

A

Used in conjunction with the compass to indicate where the mariner may find the best navigational waters

53
Q

What is the officer of the deck responsible for?

A

The safe navigation of the ship and to the commanding officer

54
Q

What is the QMOW responsible for?

A

Plotting fixes and course as needed as well as MOBI, the ships deck log, maintaining speed, distance and time to all waypoints and evolutions as needed.

55
Q

What is the telltale panel do?

A

Indicates ships running light configuration

56
Q

Who utilizes the JW circuit?

A

Bearing book recorder, bearing takers and combat for radar fixes

57
Q

What instrument determines atmospheric humidity?

A

A psychrometer.

58
Q

What day shapes do we fly for anchor?

59
Q

What shapes are flown for no command?

A

Ball over ball

60
Q

What shapes are flown for restricted maneuvering?

A

Ball diamond ball

61
Q

Who loses most when ship runs aground?

A

CO, XO, navigator

62
Q

Who is the navigator?

63
Q

What is the bravo flag used for?

A

Refueling/ ammunition handling

64
Q

What is SOPA?

A

Senior officer present afloat

65
Q

What is flag is flown for recalling personnel?

66
Q

What flag is flown for divers?

67
Q

What flag is flown for personnel working aloft/over the sides?

68
Q

What condition is set when hauling up the flag Lima?

69
Q

What flag is used for ready to receive a ship alongside are sea?

71
Q

What flag do we use when ready to receive a ship along side in port?

72
Q

Who is the assistant navigator?

A

QMCS Robles

USS Boxer ESWS (10 decks)

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