¶ Introduction
When an aircraft carries a transponder, the pilot shall operate the
transponder at all times during flight regardless of whether the
aircraft is within or outside airspace where radar is used for air
traffic service purposes (secondary surveillance radar SSR).
Pilots shall indicate the capability of the transponder aboard the
aircraft in item 10 of the flight plan by inserting the appropriate
letter.
Except in specific cases (see specific procedure), the pilot shall:
- Operate the transponder and select the transponder code as directed
by the ATC unit with which contact is being made. - Operate the transponder on the code as prescribed on the basis of
regional air navigation agreements. - Operate the transponder on code 2000, in the absence of any ATC
unit.
When requested by ATC to confirm squawk (code), the pilot shall:
- Verify the code setting on the transponder
- Reselect the assigned code if necessary
- Confirm to ATC the setting displayed on the controls of the
transponder
Pilot shall not SQUAWK IDENT unless requested by ATC.
¶ Transponder mode
IvAp shall be considered as a type mode S transponder on the IVAO
network.
Other modes can be programmed when filling the flight plan using the
adequate letter.
¶ Transponder status
The transponder has two settings on IVAO:
- STBY (associated with the orange spot)
- TX (associated with the green spot) can be considered as ALT real
mode.
On the image below, you can see that the transponder mode is set to TX
mode.
On the image below, you can see, that the transponder mode is set to
STBY
. 
\
All pilots must:
- Set transponder to STDBY position before connecting to the IVAO
network - Set transponder to STDBY position on apron and during taxi
- Set transponder to TX position when cleared entering on runway for
departure, and at the latest before take-off - Keep transponder to TX position all the time while flying
- Set transponder to STDBY position after vacating the landing runway
As a pilot in command, you must set your transponder code yourself.
During formation flights, only the leader has to set his transponder on
TX. The other aircraft must maintain visual contact with the leader and
will keep their transponder on the STDBY position.
There is no OFF mode in IVAO transponder equipment. Equipment lower
position is always standby. In conclusion, you cannot disappear from the
IVAO radar. TA and TA/RA mode are simulated using the IvAp TCAS system
¶ Transponder IDENT
When an air traffic controller wants to locate you quickly, he can
request a "transponder ident" to the pilot. The pilot accordingly will
press the IDENT or ID button of his IvAp interface when
requested by the ATC.
Note that the pilot must press the IDENT button only when requested to
do a "transponder IDENT" or "SQUAWK IDENT" procedure by an air traffic
controller.
On the image below, you can see that the ID button is inactive.
On the image below, you can see, that the ID button is active = light
grey colour (it has been pressed for the IDENT procedure asked by an
ATC).
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¶ Transponder code
The pilot shall tune the transponder code using the IvAp interface (.x
command) or instrument in the cockpit. The air traffic controller will
receive the transponder code displayed on the IvAp interface.
On the image below, you can see that the transponder code is 2000:
On the image below, you can see that the transponder code is 4641:
On the image below, you can see, that the transponder code is 2000 and
transponder mode is set to STBY and the ID button is active (it has been
pressed for the IDENT procedure asked by an ATC).
In phraseology, controllers use the term "squawk" before sending a
transponder code.
Example "Squawk 2103".
When entering a control zone, the pilot shall initiate communications
with the active ATC. After first contact, the controller can assign a
new transponder code. The pilot shall tune it without delay.
Example:
You fly IFR in Uruguay in a non-controlled zone; a Brazilian
controller outside your flight zone gives you 0535
transponder code => you must keep 2000 or tune 2000 if you forgot to
tune it.
You fly IFR in Uruguay in a non-controlled zone; a Brazilian
controller outside your flight zone gives you 2000 transponder code
=> you must tune 2000 as this is a non-controlled transponder code.
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See also
¶
Reference
- none
¶
Author
- VID 150259 - Creation - Wiki integration