Vertical Navigation Flashcards
The altimetre doesnt measure ……
The altimetre measures ……
the difference between the ambient atmospheric pressure (static pressure) and the reference pressure which has been set on the subscale
Atmospheric pressure drops at a rate of …..
1 hpa for every 30ft in height
State the rule when setting the QNH for an aircraft that remains at the same level
- if the subscale readin is increased the main scale will increase
- If the subscale is decreased then the main scale will also decrease
Becasue the height of objects referenced on charts is found in height AMSL the most important thing for a pilot is …..
the QNH at MSL
Measureing height above an airfield would be useful for ….. ….. and ….. and is called …..
aerobatics pilots and parachutists and is called QFE
An aircrafts height AMSL is reffered to as its …..
The height of a fixed point such as a mountain top or an aerodrome is reffered to as …..
Altitude and elevation are both referenced to …..
To find QFE we …..
Turn the subscale knob so the main scale reads zero
For all cross country flights what is always used …..
For the cruise segment of a flight the ….. ….. should be set of a station within …..
local QNH should be set of a station within 100nm
If the local QNH is not available for some reason then the ….. ….. should be used
If the local QNH of the departure aerodrome is not available …..
then set the subscale so the main scale reads the elevation of the field
If the local QNH of the destination aerodrome is not available then …..
stay on the area QNH