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Nav Exam 1 Flashcards

1
Q

What is air navigation

A

The art and science of safely navigating an ACFT from one place to another and determining it’s position at any time.

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2
Q

What are the essential questions of air navigation

A

Where am I? where am I going? When will I arrive at my destination? How will we get there?

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3
Q

The shape of the earth is?

A

Oblate spheroid

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4
Q

Shape of Earth for Navigation purposes

A

Perfect sphere

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5
Q

Define true poles

A

The extremities of the diameter about which the earth rotates

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6
Q

Define magnetic poles

A

The extremities of which the diameter indicated by a north seeking magnet

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7
Q

Define a great circle

A

A line on the surface of the earth with a centre and radius the same as the Earth

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8
Q

Define a small circle

A

A line on the earths surface with a radius and centre not the same as the earths

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9
Q

Define the equator

A

A great circle that is perpendicular to the axis of rotation and equal distance from both poles

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10
Q

What are meridians

A

semi great circles that join the poles

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11
Q

What are lines of latitude

A

Small circles that are parallel to the equator

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12
Q

What is a rhumb line

A

A regularly curved line that cuts through all meridians at the same angle

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13
Q

What occurs when a curved surface is represented on a flat surface

A

Distortion

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14
Q

What are 4 properties of an ideal map

A

Constant scale, adjacent maps can be places next to each other, con-formality, equal areas, rhumb lines as straight lines, great circles are straight lines

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15
Q

List 3 properties of con-formality

A

Scale expansion/contraction from any point is independent of azimuth/direction. Shape on the chart conforms to the area being portrayed. Meridians and parallels cut at right angles

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16
Q

List 4 properties of a Mercator projection

A
  • great circle is curved convex to the pole
  • scale is constant only at the standard parallel
  • bearings are correct
  • rhumb line is straight
  • the equator and meridians are the only great circles with straight lines
17
Q

Limits of the Mercator projection

A
  • can’t depict poles
  • must apply conversion angles to great circle tracks
  • distortion of large shapes
  • large distance difficult to measure
  • limited to 70N-70S
18
Q

4 properties of a lamberts conformal projection

A
  • great circles are straight lines
  • has 2 standard parallels
  • scale considered consistent
  • conformal
19
Q

Care must be takes when plotting on a lamberts chart due to:

A

Lines of longitude convergence

20
Q

2 methods of expressing scale of a chart

A

Fraction, statement or geographically

21
Q

Is 1 : 500 000 or 1 : 1 000 000 a smaller scale chart?

A

1 : 1 000 000

22
Q

Would 1:250 000 or 1 : 500 000 cover a smaller areas with a same sized map

A

1 : 250 000

23
Q

List 2 of the 4 major properties of an aviation map or chart

A

Lattitidude/ longitude grid
Elevation in feet
Mercator or lamberts projection
Centrally controlled

24
Q

Charts used for high level instrument flying

A

ERC H, ONC

25
Q

Charts used for low level visual flight are

A

ERC L, VNC

26
Q

What Map has one grid of latitude and longitude

A

ERC L

27
Q

Which map has 2 grids, latitude/longitude and transverse Mercator grid

A

TPC

28
Q

Which of the following identify a nav aid: Tindal, Tindal Tower, TN, YPTN

A

TN (2 letters = nav aid)

29
Q

Number of arrow heads for Wind velocity, heading, track respectively

A

3, 1, 2

30
Q

List the 6 key elements of the vectors if they trainable of velocities

A

Heading, TAS, track, ground speed, wind direction, wind speed

31
Q

What is the need for safety height calculations

A

Because of operations of designated airways

32
Q

To calculate area safety altitude for a DR flight, the effective area is determined by:

A

50nm plus a 5 nm buffer

33
Q

The lowest LSALT is:

A

1500

34
Q

To obtain safety height from maximum elevation figures you add:

A

1500’

35
Q

What represents the winter time zone of Nowra?

A

UTC + 10
“K” time

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