# Vertical Navigation Flashcards

1
Q

The altimetre doesnt measure ……

A

height

2
Q

The altimetre measures ……

A

the difference between the ambient atmospheric pressure (static pressure) and the reference pressure which has been set on the subscale

3
Q

Atmospheric pressure drops at a rate of …..

A

1 hpa for every 30ft in height

4
Q

State the rule when setting the QNH for an aircraft that remains at the same level

A
1. if the subscale readin is increased the main scale will increase
2. If the subscale is decreased then the main scale will also decrease
5
Q

Becasue the height of objects referenced on charts is found in height AMSL the most important thing for a pilot is …..

A

the QNH at MSL

6
Q

Measureing height above an airfield would be useful for ….. ….. and ….. and is called …..

A

aerobatics pilots and parachutists and is called QFE

7
Q

An aircrafts height AMSL is reffered to as its …..

A

altitude

8
Q

The height of a fixed point such as a mountain top or an aerodrome is reffered to as …..

A

elevation

9
Q

Altitude and elevation are both referenced to …..

A

MSL

10
Q

To find QFE we …..

A

Turn the subscale knob so the main scale reads zero

11
Q

For all cross country flights what is always used …..

A

QNH

12
Q

For the cruise segment of a flight the ….. ….. should be set of a station within …..

A

local QNH should be set of a station within 100nm

13
Q

If the local QNH is not available for some reason then the ….. ….. should be used

A

area QNH

14
Q

If the local QNH of the departure aerodrome is not available …..

A

then set the subscale so the main scale reads the elevation of the field

15
Q

If the local QNH of the destination aerodrome is not available then …..

A

stay on the area QNH

16
Q

Change to the destination QNH at …..

A

ToD

17
Q

Aircraft operating above 10,000ft set their altimeters to ….

A

1013hpa

18
Q

Levels measured with reference to the local/area QNH are known as …..

A

altitude

19
Q

Levels measured with reference to the 1013 datum are known as …..

A

flight levels

20
Q

The transition altitude is at …… and is written as …..

A

10000ft and is written as A100

21
Q

The lowest flight level is …. and is written as …..

A

FL110

22
Q

On days when the QNH is less than 1013 …..

A

you cannot cruise at FL110 the minimum is FL115

23
Q

FL115 is not available when the QNH is below

A

997hpa

24
Q

an aircraft is climbing at 600ftpm with a climbing GS of 90kts.

how far down track will it travel during a climb from 2500ft to 8500ft?

A

15nm

25
Q

Decent is at 500ftpm from 8500ft to 1500ft AGL with an aerodrome elevation of 1000ft. GS druing the decent is 120kts.

How far from the aerodrome should the decent commence?

A

24nm

26
Q

A good rule of thumb for decent points is …..

A

Multiply the number of thousands of feet you want to lose by 5 to get your decent point