AGCS Flashcards
What is an AGCS
Air ground communication service
A service provided from an aerodrome to give information to pilots of aircraft flying in the vicinity of the aerodrome by means of radio signals.
Who is responsible for ensuring the qualifications and competence of the ROCC holders at a unit?
The Wireless Telegraphy Act licensee holder of the aerodrome.
Outside what distance should pilots not attempt to contact a ground station?
When outside 10nm and/or 3,000ft, or outside the DOC
When must an individual hold a ROCC?
When providing; AFIS AGCS OCS information to parachutists Clearance as part of the clearance delivery officer task
Is an AGCS an ATS?
No as it does not include an alerting service.
What is the correct call sign for an AGCS unit?
“xxx Radio”
What are the categories of messages?
- Distress calls, distress messages and distress traffic.
- Urgency messages, including messages preceded by the medical transports signal.
- Communications relating to direction finding.
- Flight safety messages.
- Met messages.
- Flight regularity messages.
- Messages relating to direction finding.
- Government messages for which priority has been expressly requested.
- Service communications relating to the working of the telecommunications service or to communications previously exchanged.
- Other aeronautical communications.
How do units utilising the same frequencies avoid interfering with one another?
By making sure there is sufficient geographical separation between the two units.
Transmitting techniques
Before transmitting check that the receiver volume is set at the optimum level.
Be familiar with microphone operating techniques and do not turn your head away from it whilst talking or vary the distance between it and your mouth.
Use a normal conversation tone, speak clearly and distinctly.
Maintain an even rate of speech not exceeding 100 words per minute.
Maintain the speaking volume at a constant level.
A slight pause before and after numbers will assist in making them easier to understand.
Avoid using hesitation sounds.
Depress the transmit switch fully before speaking and release it after to avoid clipping transmissions.
Be aware that the mother tongue of the person receiving the message may not be english.
Messages should not contain more than three specific phrases, comprising a clearance, instruction or pertinent information.
Correct way to transmit numbers
All numbers contains whole hundreds or thousands shall be passed by pronouncing each digit in front of the hundred of thousand followed by hundred or thousand;
E.g. 1000= wun tousand
14000= wun fower tousand
25500= too fife tousand fife hundred
Call signs for aeronautical stations
Area control CONTROL Radar RADAR Approach control.APPROACH Approach control radar/ departure DIRECTION / DEPARTURE (RADAR if performs both) Ground movement. GROUND MATZ. ZONE Precision approach radar. TALKDOWN Flight info. INFORMATION AGCS. RADIO Clearance delivery. DELIVERY
Can AGCS provide clearances?
No.
ATC clearances only on behalf of an ATC unit.
Mandatory read backs
Speed instructions Taxi/towing instructions Altimeter settings Runway in use SSR code setting instructions Type of ATS Heading instructions Airways or route clearances Transition levels Clearance to enter, take off from, land on, backtrack on, hold short of and cross an active runway Approach clearances Level instructions Frequencies VDF information
Can an AGCS issue instructions to aircraft?
No, they may only provide advice and information useful to the safe and efficient conduct of flight (NOT A BASIC SERVICE AS DOES NOT INCLUDE AN ALERTING SERVICE).
How many phrases should a message contain at most?
Three phrases comprising a clearance, instruction, or pertinent information.
What is the correct phraseology in response to an aircraft in distress?
GXXXX, roger mayday/pan (give wind if a/c intends to land on runway).
Then!
All stations, Blackbushe Radio, stop transmitting, mayday/pan
To reestablish comms.
All stations, Balckbushe Radio, distress traffic ended
What is the correct phraseology for the imposition of silence?
All stations, Blackbushe Radio, stop transmitting, mayday/pan.
Pilot emergency message
- Mayday or pan pan
- Name of the station addressed.
- Call sign
- Type of a/c
- Nature of emergency
- Intention of PIC
- Present or last known position, flight level/altitude and heading
- Pilot qualifications
- Any other useful information
What is the radio horizon of a vhf aeronautical station?
For receiving aircraft station is 3000ft at 67nm
Double for 6000ft for example
What is the distance of the radio horizon formula?
Distance in nm= 1.23xsquare root of height in feet
What is the readability scale?
- Unreadable
- Readable now and then
- Readable with difficulty
- Readable
- Perfectly readable
Define distress
A condition of of being threatened by serious and/or imminent danger and of requiring immediate assistance.
Define urgency
A condition concerning the safety of an aircraft or vehicle, or of some person on board within sight, but which does not require immediate assistance.
Abbreviate speed bird GIANB
Speedbird NB
What does wilco mean?
I have understood your last message and will comply.
What does roger mean?
UI have received your last transmission
When may the call sign of a station be omitted?
When two way communication has been established and it will not be confusing.
