Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

EASA Navigation > Earth, charts, time, magnetic compass and directions > Flashcards

Earth, charts, time, magnetic compass and directions Flashcards

1
Q

perihelion

A

where earth is closest to the sun

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

aphelion

A

where earth is farthest from the sun

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

Solar days in a year

A

365.24

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

Axial tilt

A

Earth tilt compared to the sun 23.5 degrees

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

Longitude

A

Lines connecting the polars

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

Latitude

A

Lines horizontally to the earth

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

Summer solstice

A

In the northern hemiphsphere, where the earths tilt towards the sun it at maximum extent

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

meridian of longitude

A

Semicircle joining the poles

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

Prime Meridian

A

Zero longitude, passes on Greenwich time (London)

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

Anti-meridian

A

The opposite side of prime merdiain, 180E/W

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

parallel of latitude

A

a line parallel to the equator

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

Meridian examples

A

30E, 30W

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

Parallels examples

A

30N 30S

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

True north parallel

A

90N

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

True south parallel

A

90S

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

A great circle

A

A line that passes through the center of earth

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

Examples of great circles

A

All meridians, the equator, and path followed by radio waves

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

Great circle two important properties

A
  • The shortest distance between any two points.
  • Only one great circle can be drawn between two points, unless they are antipodal or on opposite sides of the earth
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

small circle

A

A circle that does not pass on earth center.

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

Examples of small circles

A

All parallels except for the equator

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

Rhumb line

A

A line that maintains a constant angle at each meridian crossed

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

Why rhumb line is important compared to great circles

A

The bearing of the track in a great circle will change continously in flight (passing merdiains at different angles). Rhumb line avoids that.

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

1 minute of latitude equals to?

A

1nm

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

60 minutes of latitude equals to

A

60nm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
1 degree of latitude equals to
60nm
26
Latitude minutes: 1. מאונך 2. מאוזן when looking at an area chart
מאונך
27
Flying from north to south on a meridian, what will change? latitude or longitude? IMPORTANT
Latitude
28
An aircraft flying from 05 30'S to 32 30'N. How much is the distance in NM
38. From SOUTH to equator: 5 degrees and 30 minutes From equator to NOTH: 32 degrees and 30 minutes IMPORTANT
29
Direct Mercator chart (standard mercator cylicdrical)
tba
30
Lambert conformal conic projection
tba
31
TMZ
Transponder mandatory zone
32
RMZ
Radio mandatory zone
33
ATZ
Aerodrome traffic zone
34
How much degrees of longitude earth rotates each hour
15
35
Solstice
More daytime
36
Equinox
Less daytime
37
International dateline
Where day UTC minuses and UTC pluses meet and date changes
38
Twilight
the incomplete light the sun gives before sunrise or sunset
39
Civil twilight sun degrees
6 deg below the horizon
40
Sunrise and sunset (upper or bottom limb?)
When upperlimb is on the observer's horizon for sunsent: when upperlimb disappeares for observers horizong
41
Things that might make daylight appear shorter
- Clouds from the west on sunset - Terrian from the west on sunset blocking the eastern field Apply the viceversa for sunrise
42
Night time defnition
Sunset +30m Sunrise -30m
43
If need to calculate UTC difference with a W longitude, should add / divide from UTC?
divide
44
If need to calculate difference between E and W longitude, should add or divide?
add
45
If need to calculate difference between E and E, should add or divide?
divide
46
If need to calculate UTC difference. with a E longitude, should add or divide?
add
47
Grid lines in charts are magnetic north or true north
true north
48
Bearing
the course from point a to point b in terms of true north
49
True north in charts name
Grid north
50
Wind direction given my meteo services will be magnetic or true?
true
51
Variation defnition
The angular difference between the north geographic and magnetic pole
52
agonic line
A line with no magnetic variation. Magnetic = true
53
Isogonals
Lines of the same magnetic variation in a magnetic map
54
If magnetic north is west of true north, the magnetic direction shall have higher / less degrees than true direction
Higher
55
If magnetic north is east of true north, the magnetic direction shall have higher / less degrees than true direction
Less
56
Variation west - magnetic best; Variation east - magnetic least
remember
57
What is 100°T
100 true heading
58
What is 100°M
100 magnetic heading
59
Compass deviation (or just deviation)
The interference from aircraft metal structure and other components and affect the magnetic compass. The deviation is in degrees
60
Deviation west- compass best; deviation east - compass least
Expect the compass value to be greater on west deviation.
61
What is 257°C
257 compass heading
62
Calculating true north heading from charts to final compass heading
True north heading -> Magnetic Heading with magnetic variation Magnetic heading w. variation -> Compass heading with compass deviation
63
Dip
compasses closer to the north magnetic pole will point to the ground
64
Why do compass has error when acceleration / deceleration or in a turn?
The CG of the needle (pivot?) needs to settle before it shows the correct heading. The CG in the northern hemi is dispalced at the south pole of the needle.
65
LMT
Local Mean Time
66
Time difference between each 15° of longitude
1 hour
67
Time difference between each 1° of longitude
4 minutes
68
Time difference between each 1' (minutes) of longitude
4 seconds
69
Calculator LMT difference between 00°08'W and 151°13'E
10 hours, 5 minutes, 24 seconds
70
Calculate: Flying 255°T Variation 6°E Deviation 2°W What is the compass heading
251°C compass heading

EASA Navigation (5 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions