Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Tylers Stuff > Navigation > Flashcards

Navigation Flashcards

1
Q

The diameter through the equater is about _____ nautical miles longer than is the diameter through the North and South poles.

A

23

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

A ______ is geometric plane passing through the center of the earth, which divides the earth into two equal parts.

A

Great Circle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

How large is the earth’s circumference?

A

21,600 nm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

In every degree of arc in a circle, there are how many minutes?

A

60

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

For every minute of arc in a circle, there are how many seconds?

A

60

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Parallel circles on the surface of the earth moving from the equator to the North or South pole?

A

Latitude

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

One degree of latitude is equal to how many nautical miles?

A

60

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

One minute of latitude is equal to how many nautical miles?

A

One

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

For normal boat navigation, what type of chart projection is used?

A

Mercator

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

When measuring distance in navigation always use what scale?

A

Latitude

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

A degree of longitude is only equal to 60 miles where?

A

At the equator

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

The prime meridian is 000 degrees and passes through where?

A

Greenwich, England

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

The 180 degree meridian is known as?

A

International Date Line

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

An imaginary line that intersects all meridians at the same angle?

A

Rhumb line

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What are the 2 basic types of projections?

A

Mercator and Gnomonic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

The difference between true and magnetic north?

A

Variation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Number on the chart represent soundings of the water depth at what tide?

A

Mean low tide

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Tidal datum that is the average of all the low water heights observed over the National Tidal Datum Epoch (19 year average)?

A

Mean low water

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Tidal datum that is the average of the lowest low water height of each tidal day observed over the National Tidal Datum Epoch (19 year average)?

A

Mean lower low water

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Also known as fathom curves, these lines connect points of roughly equal depth and provide a profile of the bottom?

A

Contour lines

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

General chart scales are between?

A

1:150,000 to 1:600,000

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

Coastal Charts are produced at scales between?

A

1:50,000 and 1:150,000

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

Harbor charts are produced at scales larger than?

A

1:50,000

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

Small craft charts are produced at scales?

A

1:40,000 or larger

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

All slanted roman lettering on the chart is used to label what information?

A

All information affected by tidal change or current

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

Which color ink is used for most information on a chart since it is easier to read under red light?

A

Magenta

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

The line or mark scribed on the compass housing to indicate the direction in which the boat is heading?

A

Lubber’s line

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

The difference between magnetic and compass?

A

Deviation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

The angular diffference between a compass direction and its corresponding true direction?

A

Compass error

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
30
Q

Variation changes with the geological location of the boat and is caused by?

A

Earth’s magnetic field

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
31
Q

________ changes the boats heading, and is not affected by the geographic locatin of the boat.

A

Deviation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
32
Q

“Swinging the ship” helps determine?

A

Deviation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
33
Q

To correct the compass, you ____ easterly errors, and _____ westerly errors.

A

Subtract, Add

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
34
Q

Can Dead Men Vote Twice At Election

A

Compass, Deviation, Magnetic, Variation, True, Add Easterly errors

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
35
Q

This hand-held line is used for ascertaining the depth of water and consists of a line marked in fathoms and weight of 7 to 14 pounds?

A

Lead line

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
36
Q

What is the first fathom of a lead line marked by?

A

Wooden toggle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
37
Q

Second mark on the lead line (2 fathoms)?

A

Two strips of leather

38
Q

Mark that indicates 3 fathoms and 13 fathoms on a lead line?

A

Three strips of leather

39
Q

Mark that indicates 5 fathoms and 15 fathoms?

A

One white rag

40
Q

Mark that indicates 7 fathoms and 17 fathoms on a lead line?

A

One red rag

41
Q

One strip of leather with a hole on a lead line indicates what depth?

A

10 fathoms

42
Q

20 fathoms on a lead line is indicated by?

A

Two knots

43
Q

25 fathoms on a lead line is indicated by what?

A

One knot

44
Q

What is inserted at the bottom of the lead line to help gather samples of the sea bottom?

A

Tallow

45
Q

If a boat is traveling 10kts, how far will it travel in 20 mintues?

A

3.3 NM

46
Q

Speed, Time, Distance formula?

A

60 D = S x T

47
Q

The actual direction that boat’s bow is pointing at any given time?

A

Heading

48
Q

Line drawn on a chart goin in one direction of a course?

A

Course line

49
Q

The approximate position by advancing a previous position for course and distance only, without regard to other factors such as wind, current, and sea conditions?

A

Dead reckoning

50
Q

A DR position modified by additional information, which in itself is insufficient to establish a fix?

A

Estimated position

51
Q

A line of bearing to known object, which a vessel is presumed to be located on at some point?

A

Line of position

52
Q

A position determined from terrestrial, electronic or celestial data at a given time with a high degree of accuracy?

A

Fix

53
Q

A position determined by crossing LOPs obtained at different times?

A

Running fix

54
Q

How many feet are in a nautical mile?

A

6,076 ft

55
Q

The average speed in knots that must be maintained to arrive at a destination at any appointed time?

A

Speed of advance

56
Q

The speed of travel of a boat along the track, expressed in knots?

A

Speed made good

57
Q

A course followed on intended to be followed by a boat?

A

Track

58
Q

The direction toward which the current is flowing expressed in degrees true?

A

Set

59
Q

The speed of the current usually stated in knots?

A

Drift

60
Q

Visual fixes on a chart are marked with?

A

Circle and time

61
Q

Electronic fixes on a chart are marked by?

A

Triangle and time

62
Q

DR positions are marked by?

A

Semi-circle and time

63
Q

Estimated positions are marked by?

A

Square and time

64
Q

A DR should be plotted when?

A

Every hour on the hour, every course change, every speed change, every fix or running fix, every bearing, and anything unusual.

65
Q

A error of 1 degree at 1 mile will result in an error of?

A

100 ft

66
Q

An ideal fix has how many LOPs?

A

3

67
Q

LOP’s should have a seperation of at least ___, but not more than ___?

A

60 degrees, 120 degrees

68
Q

The shorter the time interval between LOPs, the more ___ the running fix?

A

Accurate

69
Q

Advancing a LOP for more than ___ minutes should be avoided?

A

30 minutes

70
Q

Bearing used to keep a boat clear of hazardous areas in the vicinity of the track?

A

Danger bearings

71
Q

Which fix is more reliable, visual or electronic?

A

Visual

72
Q

The GPS is radio navigation system of how many DoD operated satellites?

A

24

73
Q

GPS provides what two services?

A

SPS and PPS

74
Q

Standard Position Service is accurate to a radius within ___ meters 99% of the time?

A

33

75
Q

Precise Position System provides fixes accurate within ___ meters, and is limited to U.S. Federal government, allied military and civil users?

A

10

76
Q

A GPS receiver must compute the range of at least how many satelittes?

A

4

77
Q

What does ECINS stand for?

A

Electronic Charted and Integrated Navigation System

78
Q

What does ECS stand for?

A

Electronic Chart System

79
Q

What does SINS stand for?

A

Scalable Integrated Navigation System

80
Q

What does ECDIS stand for?

A

Electronic Chart Display and Information System

81
Q

Adequate back up arrangements for ECINS shall be transferable in how many fix intervals?

A

One fix interval

82
Q

Manually entering visual and radar LOPs is considered what type of navigation?

A

Mode 2

83
Q

In restricted waters, you should compare the primary positioning source to a backup source when?

A

At least every thrid fix

84
Q

ECS is primarily used as a?

A

Situational awareness tool

85
Q

Primary navigation should be transferable to paper plot within how many fixes?

A

One

86
Q

Does SINS meet the standards for ECS?

A

No

87
Q

When plotting with paper charts, fixes shall be plotted no more than ___ minute intervals?

A

30

88
Q

When navigating within restricted waters, a fix shall be plotted a least every ___ minutes?

A

15

89
Q

Do boats using SINS or ECS with an adequate primary position source need to plot paper fixes?

A

No

90
Q

What form is compass deviation recorded on?

A

CG-2596

Tylers Stuff (8 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions