Brainscape's Knowledge GenomeTM

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


See full index

CPL > Navigation > Flashcards

Navigation Flashcards

1
Q

What is the polar axis?

A

Axis of rotation

Two points where this axis meets surface of sphere

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

What is true north?

A

Two points where axis meets surface of sphere

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

If you stand anywhere on earth and face toward the north geographic pole, which way are you facing?

A

True north

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

What is a great circle?

A

Plane which passes through the centre of the sphere (earth)

The largest circle that can be drawn on the surface of the earth

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

What are three examples of great circles?

A

Meridian of longitude
Equator
Horizontal paths of radio waves

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

What is the arc of the great circle?

A

The shortest distance around surface of sphere between two points

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

What is the reference point for latitude?

A

Equator

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

What is latitude?

A

Angular distance in degrees from equator measured at centre of earth.
Great circle with plane perpendicular to polar axis

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

What is a parallel of latitude?

A

Joins all points of same latitude

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

What is meridian of longitude?

A

Great circles containing polar axis (passes through north and south geographic pole)

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

Meridians of longitude are specified by what?

A

Difference in degrees east or west from meridian of longitude

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

What is a rhumb line?

A

Track for which direction remains constant when referred to true north

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

What is true direction?

A

Measure direction by reference to local meridian, using north geographic pole or true north

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

What is the advantage of true direction?

A

Constant directional reference

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

What is variation?

A

Angular difference between true north and magnetic north

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

What is magnetic direction?

A

Line of magnetic force that influences direction of compass

Actual direction pointing to earths north magnetic pole

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

What are isogonals (or isogonic lines)?

A

Lines drawn on charts joining all places having same magnetic variation

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

What is relative bearing?

A

Angular distance from aircrafts heading measured clockwise from nose of aeroplane

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

One nautical mile is equal to what?

A

One minute of latitude

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

What charts can be joined exactly east/west?

A

WAC chart

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

Can two WAC charts be joined exactly north/south? Why/why not?

A

No

The charts have different standard parallels

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

If B is due east of A in the southern hemisphere then what happens to a flight which followed the rhumb line track?

A

A flight which followed the rhumb line track from A to B would diverge to the left of the straight line drawn on the WAC chart

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

Two WAC charts can be joined east to west because?

A

They are projections from the same cone

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

An aircraft which tracks along the 030 omni radial from a station

A

Follows a great circle path

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

Direction on a WAC chart should be measured by reference to mid meridian because?

A

The chart is a conic projection

26
Q

What happens to minutes of longitude as you move north or south?

A

Becomes less than 1nm

27
Q

In degrees and hours, how much does the sun move in 24 hours?

A

360 degrees in 24 hours

28
Q

Which direction does earth rotate?

A

West to east

29
Q

How do we get the difference between prime meridian and any given meridian?

A

Divide degrees by 15.

e.g. 148 degrees E, divide by 15 = 9.86 hours (9 hours 52 mins)

30
Q

When does astronomical twilight occur?

A

18 degrees below observers horizon

31
Q

When does civil twilight occur?

A

When sun is within 6 degrees of observers horizon

32
Q

When does BOD occur?

A

At commencement of morning civil twilight (6 degrees below observers horizon)

33
Q

When does EOD occur?

A

End of evening civil twilight

34
Q

When is the duration of twilight longer?

A

When you are further south

35
Q

At the equator, would twilight be short or long?

A

Short

36
Q

Where does the sun rise during summer in souther hemisphere?

A

South of east

37
Q

Where does the sun rise during winter in southern hemisphere?

A

North of east

38
Q

Which direction does sun rise/set?

A

Rise in the east, sets in the west

39
Q

What is the formula for daylight available?

A

EOD - BOD

40
Q

What is the Flight Planned Track (FPT)?

A

Line drawn across map joining two points

41
Q

During winter in the southern hemisphere the LMT of EOD would occur earlier at the destination than the departure point for a flight which travels which direction?

A

South

42
Q

The duration of daylight experienced by the occupants of an aircraft is less than the experienced at the departure point or destination for a flight which travels what direction?

A

East

43
Q

For a flight which travels south in the southern hemisphere on the autumn equinox, the LMT of EOD would occur when at the destination and departure point?

A

At the same time at the destination as at the departure.

44
Q

Places on the same meridian will always have the same LMT for BOD on any given day, true or false?

A

False

45
Q

On a place on the same meridian, when will it always have the same LMT for BOD on any given day?

A

Spring and autumn equinox

46
Q

Name one chart that is a Mercator Projection?

A

VTC

47
Q

With regards to TAS, IAS and GS, what is true with an aircraft flying at 5000 feet in a tailwind?

A

TAS greater than IAS and less than GS

48
Q

What is true with regards to great circles on Lamberts Conformal Conic Projection?

A

Great circles appear as straight lines

49
Q

What angle does rhumb line cut every meridian on earth surface?

A

Same angle

50
Q

Town A is S20 00.0 E119 00.0 and town B is S20 00.0 E129 00.0. The distance between the towns would be what?

A

Less than 500 nm.
Two towns are on same paralel of latitude, but 10 degrees longitude apart. In this case one min of longitude isn’t a nm because meridians converge towards pole. As you move north or south of equator, a min of longitude becomes increasingly less than a nm

51
Q

A line that joins places where the magnetic variation is zero is called?

A

Agonic line

52
Q

The vertical extent of transition layer will be greater than 1000ft when?

A

QNH is greater than 1013

53
Q

On a Mercator chart (VTC) what would a straight line represent?

A

Rhumb line

54
Q

On the mercator chart (VTC) what angle does the rhumb line cut each meridian?

A

Same angle

55
Q

On the mercator chart (VTC) which direction do great circles appear?

A

Convex to the pole

56
Q

What are some conic charts?

A

WAC and ERC

57
Q

On conic charts, what do great circles appear as?

A

Straight lines

58
Q

On conic charts, what do rhumb lines appear as?

A

Curves concave to the pole

59
Q

Which direction can conic charts be joined?

A

East to west because they have the same standard parallels and projection on same cone

60
Q

What does one nm equal?

A

One minute of LATITUDE

CPL (11 decks)

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