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PPL Course - (3) Navigation and Meteorology > Chapter 7.3 - Direction, Position and Distance > Flashcards

Chapter 7.3 - Direction, Position and Distance Flashcards

1
Q

What is T in direction?

A

True North.

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2
Q

What is M in direction?

A

Magnetic North.

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3
Q

What is C in direction?

A

Compass North.

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4
Q

What is R in direction?

A

Aircraft’s Longitudinal Axis.

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5
Q

What are True Directions (4)?

A
  • North.
  • South.
  • East.
  • West.
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6
Q

Directions measured in charts are what?

A

True Directions (North, South, East and West).

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7
Q

Meridians of Longitude indicate what on Charts (2)?

A
  • North.

- South.

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8
Q

Parallels of Latitude indicate what on Charts (2)?

A
  • West.

- East.

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9
Q

What’s the difference between North Pole and Magnetic Pole?

A

Magnetic Pole isn’t fixed like True North Pole.

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10
Q

What is the term given to describe the angular difference between True North and Magnetic North?

A

Variation (VAR).

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11
Q

What are lines on a Chart with equal Magnetic Variation called?

A

Isogonals.

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12
Q

Why is Magnetic Direction important in Navigation?

A

Because there are no instruments that senses True Direction.

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13
Q

TR = 216T with 10°E. What is TR in M?

A

206M.

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14
Q

TR = 358T with 5°W. What is TR in M?

A

003M.

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15
Q

Bearing 153M with 8°E. Find T?

A

161T.

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16
Q

Bearing 102M with 5°W. Find T?

A

097T.

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17
Q

Why is Compass Direction necessary?

A

Because of minor inaccuracies due to the magnetic material and electrical interference in the Cockpit of an Aircraft.

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18
Q

What is the term given to describe the angular difference between Magnetic North and the Aircraft’s Compass Needle?

A

Deviation.

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19
Q

True or False. Converting Magnetic North to Compass Direction is the same as True North to Magnetic North?

A

True.

20
Q

It is by common sense before a flight to always to do what with the Compass?

A

Check the deviation card.

21
Q

What is the maximum deviation allowed before a ‘main’ direct-reading Compass is unserviceable?

A

5°.

22
Q

What is the maximum deviation allowed before a ‘standby’ direct-reading Compass is unserviceable?

A

10°.

23
Q

What is the maximum deviation allowed before a gyro-stabilised remote-reading Compass is unserviceable?

A

2°.

24
Q

True or False. Never ignore a deviation for a Compass if it’s more than 2° or 3°?

A

True.

25
Q

What’s the equation for working out Compass/True?

A

Compass +/- Deviation = Magnetic +/- Variation = True.

26
Q

What is the Compass Direction for the below?

T = 045°, VAR 10°E and DEV 5°W?

A

045°T – (+10°E) = 035°M – (-5°W) = 040°C.

27
Q

Which is the shortest distance, a curved line or a straight line in Navigation?

A

Curved Line.

28
Q

What does GC stand for?

A

Great Circle.

29
Q

Define GC?

A

Any circle drawn on the Earth’s surface whose centre is the centre of the Earth.

30
Q

True or False. If an Aircraft were to fly from two points along a great circle, it will fly the shortest distance between those two points?

A

True.

31
Q

What does RL stand for?

A

Rhumb Line.

32
Q

Define RL?

A

A curved line on the Earth’s surface that has a constant angular relationship with True North.

33
Q

What is the name given to a great circle equidistant from each poles?

A

Equator.

34
Q

The great circles through the poles is also known as?

A

Meridian of Longitude.

35
Q

Small circles and the Equator is also known as?

A

Parallels of Latitude.

36
Q

The Equator is used as the reference for Latitude, this is then measured in what direction from this reference?

A

North or South.

37
Q

The Prime Meridian (GMT) is used as a reference of Longitude, this is then measured in what direction from this reference?

A

East or West.

38
Q

The unit of circular measurement used in navigation is what?

A

Degree (°).

39
Q

In Longitude and Latitude, the degree (°) is used as a unit describing what?

A

The length of arc along the Earth’s surface.

40
Q

The Degree (°) is further divided into what?

A

60 minutes.

41
Q

What does the symbol ‘ mean in describing Longitude and/or Latitude?

A

X amount of Minutes within a Degree.

42
Q

What does the symbol “ mean in describing Longitude and/or Latitude?

A

X amount of Seconds, within a Minute of a Degree.

43
Q

Which figure is always given first when describing Longitude and Latitude?

A

Latitude.

44
Q

1 NM is equal to what in Latitude?

A

1 minute of arc.

45
Q

True or False. 1 minute of Latitude is equal to 1 minute of Longitude? Explain.

A

False. Because the length of Longitude varies depending on Latitude.

PPL Course - (3) Navigation and Meteorology (23 decks)

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