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Gnav - charts > Charts > Flashcards

Charts Flashcards

1
Q

What are the two charts approved by ICAO (annex 4)?

A

VFR and IFR charts

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2
Q

Charts usually represents dimensional…?

A

2d dimensional representation of 3d dimension

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3
Q

What are the three main projection type charts?

A

Azimuthal, conical and cylindrical projection

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4
Q

What is cylindrical used for?

A

equator parallel of origin

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5
Q

What is azimuthal used for?

A

pole parallel of origin

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6
Q

What is conical used for?

A

mid-latitude parallel of origin

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7
Q

Why do we use different chart projections?

A

Because each part of the earth is distorted

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8
Q

How many precen within the usable area does it need to be?

A

Less than 1%

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9
Q

How is origin used in azimuthal projection?

A

single point of contact

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10
Q

Projection is set from the opposite point

A

The projection is set from the opposite point of earth’s

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11
Q

How is origin used in cylindrical projection?

A

Great circle of tangency - equatorial region

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12
Q

How is origin used in conical projection?

A

single point contact - projected from centre

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13
Q

What is conformal chart?

A

Any chart on the earth is accurate to the chart - e.g. right-angled graticule etc

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14
Q

what is right-angled graticule?

A

Angle between intersection between longitude and latitude

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15
Q

What is non-constant scale referring to?

A

Distortion of shapes, unequal expansion of scale

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16
Q

What is the operational requirements? (6 phases)

A

-Taxi from aircraft stand to take-off point
- take-off and climb to en-route
- en-route
- descent to approach
- approach to land and missing approach
- Landing and taxi to aircraft stand

17
Q

What is large scale maps?

A

Used for terrestrial navigation - 1: 500 000

18
Q

what is medium scale?

A

for short-range flight e.g. commercial flights - 1:1000000

19
Q

what is small scale

A

intercontinental journey . 1

20
Q

Does IFR charts lack topographical details?

A

Yes

21
Q

What does IFR include?

A

Radio navigation information

22
Q

What is hypsometry?

A

Low-level topographic detail, land elevation

23
Q

In hypsometry, what is contour lines?

A

Lines joining same height

24
Q

In hypsometry, what is spot height

A

Small black dot, top of a hill

25
Q

In hypsometry, what is later tinting?

A

changes in elevation

26
Q

What projection is direct mercator?

A

cylindrical projection

27
Q

What projection is Lambert’s Canonical Conformal

A

Conical projection

28
Q

What projection is Polar stereographic?

A

Azimuthal

Gnav - charts (3 decks)

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