Monday RNav Flashcards
(24 cards)
VHF Directions finding frequency (ADF)
108 - 137 MHZ
What happens with VHF directions finding?
Someone speaks. ATC can see location. They reply with your location or which direction you need to travel in
VDF: the phase difference is a measure of
The incoming signal direction
Bearing classification:
CLASS A +/- 2⚫️
CLASS B +/- 5⚫️
CLASS C+/- 10⚫️
CLASS D > 10⚫️
VDF emergency service uses the frequency:
121.5 MHZ
QDM
Aircrafts magnetic heading to
QDR
Aircrafts magnetic bearing from
QUJ
Aircrafts true track to
QTE
Aircrafts True bearing from
QGH
Controller interpreted
A sense aerial gets rid of the
Null position and the ambiguity
NDB (non directional beacon) is a
CARDROID
ADF situated in
The ac
NDB situated on the
Ground
NDB frequency’s
LF to MF band.
190 to 1750KHZ
An NDB of 10KW will typically transmit
500nm over a typical sea surface
2 main types of NDB
And how many letters identity for each?
Locator 2 letters
En route NDB 3 letters
Promulgated range =
Max range you can receive a transmission from an NDB and guarantee it won’t be affected by another NDB transmission
Promulgated range is only valid
During the day
New power / old power is equal to
(New range / old range) ^2
NDB range over water (p is in Watts)
3Xsqurt(P)
NDB range (nm) over land:
2 X squart(P)
ICAO requirement for NDB accuracy is
+/- 5⚫️
NDB signal to noise ratio is
3:1