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Navigation Flashcards

(86 cards)

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1
Q

Define Collision

A

Occurs when a vessel hits another vessel

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2
Q

Define Aground

A

Occurs when a vessel runs into land and remains fast. Soft grounding is when a vessel gets loose under their own power, while hard grounding is when a vessel requires help to get loose or is damaged beyond repair

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3
Q

What is Advance in navigation?

A

The distance the vessel moves forward along its original course from the time the rudder is put over until steady on new course

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4
Q

What is Transfer in navigation?

A

The distance the vessel moves perpendicular to the original course during the turn

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5
Q

What factors affect Advance and Transfer?

A

Speed and/or rudder angle

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6
Q

Define Pivot Point

A

A point on the center line about which the ship turns when the rudder is put over

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7
Q

Where is the Pivot Point when in normal steaming?

A

The centerline pelorus

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8
Q

Where is the Pivot Point when accelerating?

A

The bow

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9
Q

Where is the Pivot Point when in astern propulsion?

A

The stern

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10
Q

Define Acceleration

A

Increase of velocity

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11
Q

Define Deceleration

A

Decrease of velocity

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12
Q

What determines the speed of Acceleration and Deceleration?

A

Environmental factors such as sea state and depth of water, and size and draft of vessel

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13
Q

What is the Turning Circle?

A

The path followed by the ship’s pivot point when making a 360 turn

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14
Q

What affects the diameter of the Turning Circle?

A

Rudder angle and speed

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15
Q

Define True Bearing

A

Expressed as a horizontal angle measured clockwise from true north (000-359)

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16
Q

Define Relative Bearing

A

The angle between the ship’s forward direction (bow) and the location of another object

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17
Q

What does DIW stand for?

A

A vessel that is underway and making no way through the water, whether by choice or exceptional circumstance

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18
Q

What is Head On in navigation?

A

When two power-driven vessels are meeting on reciprocal or nearly reciprocal courses

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19
Q

What does a vessel do in a Crossing situation?

A

The vessel which has the other on her own starboard side shall keep out of the way

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20
Q

Define Overtaking in navigation

A

A vessel shall be deemed to be overtaking when coming up to another vessel from a direction more than 22.5 degrees abaft her beam

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21
Q

What is the Stand On vessel?

A

The vessel that is directed to maintain her course and speed in a meeting with another vessel

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22
Q

What is the Give Way vessel?

A

The vessel that is directed to maneuver by changing her course and/or speed to keep out of the way of another vessel

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23
Q

Define Swing Circle

A

Centered at the anchor position, used to check for navigational hazards and other anchored ships while at anchor

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24
Q

What is the radius of the Swing Circle?

A

Equal to the sum of the ship’s length and the scope of the anchor chain released

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25
Define Drag Circle
Centered at the final anchor position, used to ensure the anchor is holding
26
What is the radius of the Drag Circle?
Equals the sum of the distance from the hawsepipe to pelorus and the scope of the chain released
27
What are the navigation lights for Underway (HARPERS FERRY lighting configuration)?
* Forward mast light (White) * Aft mast light (White) * Port sidelight (Red) * Starboard sidelight (Green) * Stern light (White)
28
What lights are shown for a vessel In-port, Moored?
* Aircraft warning lights (Red) * Jack staff Light (White) * Flag staff light (White) * Waterline security lights (White) * In port Deck lighting (Blue)
29
What lights are used for a vessel Engaged in Special Operations?
Three all-round lights in a vertical line: red-white-red
30
What lights indicate a Man Overboard situation?
Red over Red pulsating lights on the mast
31
What lights indicate a vessel Not under Command?
Two all-round red lights in a vertical line
32
What lights are shown for a vessel Anchored?
* Jack staff Light (White) * Flag staff light (White) * Waterline security lights (White) * In port deck lighting (Blue)
33
What lights indicate a vessel Aground?
* Same lights as at anchor * Two all-around red lights in a vertical line
34
What day shape is used for a Vessel at Anchor?
One Ball (Black in color)
35
What day shape indicates a Vessel not under Command?
Ball over Ball (in a vertical line, Black in color)
36
What day shape indicates Restricted in ability to maneuver?
Ball/Diamond/Ball (in a vertical line, Black in color)
37
What day shape is used for a Vessel Aground?
Ball/Ball/Ball (in a vertical line, Black in color)
38
What day shape indicates Constrained by Draft?
Cylinder (Black in color)
39
What flag is used for Refueling/ammunition handling?
Bravo
40
What flag is used for Personnel Recall?
Papa
41
What flag indicates a Man Overboard situation?
Oscar
42
What sound signal does a power-driven vessel making way sound?
One prolonged blast at intervals of not more than 2 minutes
43
What sound signal does a power-driven vessel stopped and making no way sound?
Two prolonged blasts in succession at intervals of not more than 2 minutes
44
What sound signal does a vessel not under command sound?
Three blasts in succession: one prolonged followed by two short blasts
45
What sound signal does a vessel at anchor sound?
Rings the bell rapidly for about 5 seconds
46
What does a vessel aground sound?
Gives the bell signal and three separate and distinct strokes on the bell
47
What wind speed classifies Gales?
Wind speed of 34-63 kts expected
48
What wind speed classifies Storms?
Wind speed of 48-63 kts expected
49
What wind speed classifies Hurricanes/Typhoons?
When winds reach 64 kts or more
50
What wind speed classifies Small Craft warnings?
Wind speed of 20-33 kts expected
51
What is a Stadimeter?
An optical device for estimating the range to an object of known height
52
What is a Sextant?
A navigation instrument that measures the angular distance between two visible objects
53
What is a Bearing Circle?
An instrument that permits the determination of the angle of separation of two observed points
54
What is a Telescopic Alidade?
An instrument utilized by bearing takers to shoot bearings to known objects
55
What is a Gyrocompass?
A nonmagnetic compass in which the direction of true north is maintained by a continuously driven gyroscope
56
Define Dead Reckoning (DR)
Determines a predicted position by advancing a known position for courses and distances
57
What does EP stand for?
Estimate of the position of a ship or aircraft at a certain time
58
What are Latitude and Longitude?
Parameters that help determine the location of any place on Earth
59
What is Set/Drift?
Describes external forces that affect a boat's course
60
What is Variation?
The angular difference between the true meridian and the magnetic meridian
61
What is Deviation?
Deflection right or left of the magnetic meridian caused by magnetic properties of the vessel
62
What is the IALA (A/B) Buoyage System?
A worldwide standard sea mark system used in navigation
63
What is Bathymetric navigation?
Uses the topography of the sea floor to acquire positioning data
64
What is Celestial navigation?
Involves reducing celestial measurements taken with a sextant to lines of position
65
What is Inertial navigation?
Accomplished by integrating the output of a set of sensors to compute position, velocity and attitude
66
What is Radio navigation?
Uses radio waves to determine position through a variety of electronic devices
67
What is the purpose of range/channel markings?
Used to mark fairways, mid-channels, and offshore approach points
68
What are the duties of the Officer of the Deck (OOD)?
In charge of the safe operation of the ship and supervises the personnel on watch on the bridge
69
What does the Conning Officer do?
Directs the ship’s movements by rudder and engine orders
70
What are the responsibilities of the Boatswains Mate of the Watch (BMOW)?
Ensures all members of the underway watch are posted and alert
71
What is the role of the Helmsman?
Responsible for keeping the ship on course as directed by the conning officer
72
What does the Quartermaster of the Watch (QMOW) do?
Assists the OOD in navigational matters and maintains the ship's daily written record
73
What is the responsibility of the lee helmsman?
Operating the engine order telegraph and ensuring all bells are correctly answered.
74
Who is responsible for the observation of hazards?
Lookouts.
75
What does the Quartermaster of the Watch (QMOW) assist the OOD with?
Navigational matters.
76
What is the deck log?
The ship's daily written record.
77
What does the QMOW report and record during their watch?
Weather changes.
78
What is the QMOW's role when the Navigator is off the bridge?
Direct representative of the Navigator.
79
What is the purpose of a barometer?
To measure air pressure and forecast short term weather changes.
80
What does a psychrometer consist of?
A wet-bulb and a dry-bulb thermometer.
81
What is determined using the difference in readings of a psychrometer?
Atmospheric humidity.
82
What is the function of communication circuits?
To facilitate communication.
83
What is a bull horn used for?
Amplifying sound for communication.
84
What does the telltale panel control?
Running lights.
85
Fill in the blank: A barometer measures _______.
air pressure.
86
True or False: The QMOW is responsible for executing required ship's navigational lighting changes.
True.

ESWS (12 decks)

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