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Esws > Navigation > Flashcards

Navigation Flashcards

1
Q

What is the drag circle?

A

Scope of chain paid out plus length from the hawsepipe to Polaris

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2
Q

What lights are used while underway?

A

Mast light, range light, stern light, port side light, and starboard side light

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3
Q

What lights are used while in-port, moored?

A

Forward and aft anchor lights, deck lighting, waterline security lights, and aircraft warning lights.

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4
Q

What lights are used for Restricted in Ability to Maneuver?

A

On the mast, red over white over red

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5
Q

What lights are used for Man overboard?

A

In the mast, blinking red over red.

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6
Q

What lights are used for Not Under Command?

A

On the mast, red over red

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7
Q

What day shapes are used for vessel at anchor?

A

One ball

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8
Q

What day shapes are used for Vessel not under command?

A

Ball over ball

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9
Q

What day shapes are used for Restricted in Ability to Maneuver?

A

Ball over diamond over ball

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10
Q

What day shapes are used for vessel aground?

A

Ball over ball over ball

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11
Q

What day shapes are used for Constrained by draft?

A

One cylinder

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12
Q

What flag is used for refueling/ammunition handling?

A

Bravo

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13
Q

What flag is used for Senior Officer Present Afloat (SOPA)?

A

Starboard

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14
Q

What flag is used for Personnel recall?

A

Papa

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15
Q

What flag is used for boat recall?

A

Quebec

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16
Q

What flag is used for divers?

A

Alpha

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17
Q

What flag is used for Personnel working aloft/over the side?

A

Kilo

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18
Q

What flag is used for Hazards of Electromagnetic Radiation to Ordnance (HERO)?

A

Lima

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19
Q

What flag is used for Ready to receive a ship alongside in-port?

A

India

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20
Q

What flag is used for man overboard?

A

Oscar

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21
Q

What flag is used for anchoring?

A

Uniform

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22
Q

What flag is used for absentee of the admiral and where does it fly from?

A

1st substitute - flown from starboard outboard yardarm

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23
Q

What flag is used for absentee of the COS and where does it fly from?

A

2nd substitute - flown from port inboard yardarm

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24
Q

What flag is used for absentee of the CO and where does it fly from?

A

3rd substitute - flown from port outboard yardarm

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25
Q

What flag is used for absentee of an embarked civil official and where does it fly from?

A

4th substitute - flown from starboard inboard yardarm

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26
Q

What are the winds for small craft warning?

A

15 to 33 knots

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27
Q

What are the winds for gale warning?

A

34 to 47 knots

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28
Q

What are the winds for storm warning?

A

48 to 63 knots

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29
Q

What are the winds for hurricane/typhoon warning?

A

64 knots or greater

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30
Q

What sound signals are used for ship underway making way?

A

At intervals of not more than 2 minutes, one prolonged blast

31
Q

What sound signals are used for ship underway not making way?

A

At intervals of not more than 2 minutes, two prolonged blasts

32
Q

What sound signals are used for ship at anchor?

A

At intervals of not more than one minute, ring the bell rapidly for about 5 seconds followed by the gong rapidly for about 5 seconds. In addition, sound one short, one prolonged, and one short blast to give warning of her position and of the possibility of collision to an approaching vessel

33
Q

What is the stadimeter used for?

A

An instrument for determining the distance to an object of known height by measuring the angle subtended at the observer by the object.

34
Q

What is the sextant?

A

The most common use of the sextant is for celestial observations using vertical angles between celestial objects and the horizon.

35
Q

What is the Parallel Motion Protractor (PMP) used for?

A

The PMP is a valuable tool for plotting direction quickly and accurately

36
Q

What kind of magnetic compass do we have?

A

Digital flux gate magnetic compass (DFGMC)

37
Q

What kind of Fathometer do we have?

A

UQN-4A

38
Q

What is latitude?

A

Measurements north and south of equator not exceeding 90degrees in either direction

39
Q

What is longitude?

A

Measurements east and west of prime meridian not exceeding 180 degrees in either direction.

40
Q

What is set?

A

The directions which currents are pushing the ship

41
Q

What is drift?

A

The speed the currents are pushing the ship

42
Q

What is the barometer used for?

A

An instrument for measuring atmospheric pressure

43
Q

What is the psychrometer used for?

A

An instrument for measuring dew point or humility

44
Q

What is the telltale panel used for?

A

Panel which indicates ship’s 5 running light configurations, also indication whether running lights are on primary or secondary filaments, using red, Amber, and buzzer modes

45
Q

Collision

A

The act or instance of colliding. Alarm is sounded, then word is passed “collision, collision on (whatever side). All hands brace for shock.” Then repeat

46
Q

Aground

A

When an part of a ship is resting on or is in contact with bottom. Day shape - 3 balls. Lights - 2 red lights

47
Q

Advance

A

The amount of distance run on the original course until the ship steadies on the new course. Advance is measured from the point where the rudder is first put over.

48
Q

Transfer

A

The amount of distance gained toward the new course

49
Q

Pivot point

A

Nearly always located about 1/3 the ship’s length from her bow when moving ahead (BLR frame 64) and at or near her stern when moving astern. Varies with speed.

50
Q

Turning circle

A

The path followed by the ships pivot point when making at 360 degree turn: diameter varies with rudder angle and speed. With constant rudder angle, an increase in speed results in increased turning circle.

51
Q

True bearing

A

Based on a circle of degrees with true north 000 degrees

52
Q

Relative bearing

A

Circle drawn around the ship herself with bow 000 degrees.

53
Q

DIW

A

Dead in water

54
Q

Head on

A

When two power driven vessels are meeting on reciprocal or nearly reciprocal courses so as to involve a risk of collision

55
Q

Crossing

A

Two power driven vessels are crossing and involve risk of collision, the vessel having the other to starboard must keep out of the way and will avoid usually by turning to starboard and passing astern of the other vessel.

56
Q

Overtaking

A

Any vessel overtaking another must keep clear of the overtaken vessel. An overtaking vessel is one they is approaching another vessel from any direction more than 22.5 degrees abaft its beam

57
Q

Stand on

A

Vessel with the right of way

58
Q

Give way

A

Vessel that has to alter course or reduce speed to allow other vessel to pass

59
Q

Parallel rulers

A

Instrument for transferring a line parallel to itself. Consist of two parallel rulers connected

60
Q

Radar

A

Device or system consisting of a synchronized radio transmitter and receiver that emits radio waves and processes their reflections for display and is used for detecting and locating objects or surface features

61
Q

Fathometer

A

Determined depth of water. Used to read fathoms and feet. Times a signal from the bottom of the ship to the ocean bed and back

62
Q

SATNAV

A

Satellite navigation. Highly accurate; passive, all-weather, worldwide navigation system. Suitable for subsurface and surface.

63
Q

GPS

A

Consists of 21 satellites (and three operational spares). Provides precise position and time information anywhere in the world.

64
Q

Ships binoculars

A

Magnification of 20 power. Field of view 70 degrees. Adjustable through 70 degrees with reference to the horizon. Rotates 360 degrees. Consists of binocular assembly, carriage assembly, pedestal.

65
Q

Bearing circle

A

Ring fitted over a repeater to find the beating of any object or obtain the bearings of other ships to determine relative motion

66
Q

Telescopic alidade

A

Simultaneously projects the image of the compass card and a view of the spirit level onto the optical view of the telescope. Object and its bearing can be viewed at the same time.

67
Q

Laser range finder

A

Uses a laser beam to determine the distance to an object. Not appropriate for high precision, sub-millimeter measurements

68
Q

Integrated bridge system

A

Systems approach for the automated collection, processing, control, and display of ship control and vital navigation sensor data. Maximizes bridge watch efficiency and ship control safety.

69
Q

Voyage Management System (VMS)

A

Computer based navigation, planning and monitoring system. Provides tool to navigate electronically.

70
Q

Automated Radar Plotting Aid (ARPA)

A

System that automatically acquired and tracks contacts. Provides accurate and timely contact information to the watch team.

71
Q

Ship Control System (SCS)

A

Provides command and control signals to the ship control and propulsion systems and monitors their performance

72
Q

Six rules of DR (dead reckoning)

A

A DR position shall be plotted:

  1. Each hour on the hour
  2. At the time of every course change
  3. At the time of every speed change
  4. At the time of a fix or running fix
  5. At the time of obtaining a single LOP
  6. New course line shall be plotted from each new fix or running fix
73
Q

Estimated position (EP)

A

Most probable position of a craft determined from incomplete data or data of questionable accuracy

74
Q

What is the swing circle?

A

Scope of chain paid out plus length of ship

Esws (11 decks)

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