Intro Flashcards
What frequency bands is VOR / ILS localiser
108 - 118mhz
What frequency range is voice comms
118-137mhz
What affects range of vhf
Power Line of sight Terrain Ducting (super refraction) Obstructions
How does atmosphere affect vhf
Transmissions degraded by moisture in atmosphere
Absorbed or scattered by:
Rain / fog/ snow/ hail/ humidity
Greater at High frequencies
What is the distance between different frequencies
8.33 kHz
If you can’t select a frequency or have 8.33khz between a frequency above FL195 what do you say
“Negative eight POINT three three”
When do you not need to pronounce all digits of a frequency
When final 2 digits are 0
What is time normally given as
Just the minutes
Sometimes hours and mins of confusion
What is a time check
Time given by atc to nearest half min
When should the word “immediately” be used
Safety reasons
What is the readability scale
1 = unreadable 2= readable now and then 3= readable with difficulty 4= readable 5= perfectly readable
What requires a read back
Pressure settings Transition level Clearances / instructions (taxi and runway) Frequencies Transponder settings Heading / speed / level VDF (direction finding) information Type of service
What are the 3 types of call sign
Registration (with aircraft type)
Telephony designation plus reg (easy -EZAS)
Designator plus flight ID
When is heavy csllsign used
MTOM greater than or equal to 136,000kg
What ways can you abbreviate your callsign
First letter and last 2/3 letters of ac reg
“G-wavv” > “g-vv”
Designator plus last 2/3 of reg
“Speedbird vv”
Designator plus flight ID = no abbreviation
“ZK-CTC” > “X-TC”
When can you change callsign mid flight
Only atc can request it temporarily
Changes back to original on frequency change