Mode-S Transponder Functionality; Traffic Information Service (Tis); Figure 3-41 Ident Indication - Garmin G1000 Reference Manual

When the IDENT softkey is pressed, a green "IDNT"
indication is displayed in the mode field of the Transpon-
der Status bar (as shown in Figure 3-41) for a duration of
18 seconds. This causes the entered identification code to
flash on ATC radar screens and thereby provides air traffic
controllers with aircraft position information.

Figure 3-41 IDENT Indication

NOTE: As soon as the IDENT softkey is pressed
when at the Mode or Code Selection softkey level,
the system reverts to the Top-level softkeys.
NOTE: In Standby mode, the IDENT softkey is
inoperative.

Mode-S Transponder Functionality

Flight ID Reporting – In accordance with ICAO
standards, the flight crew of an aircraft equipped with
Mode-S capability and having an aircraft identification
feature should set the appropriate flight ID on the aircraft
transponder. The flight ID is not to exceed seven (7) char-
acters, and no zeros, dashes, or spaces are to be added
when the aircraft identification consists of less than seven
(7) characters (please see ICAO documents 8168, 4444
and 8585 for further details).
If the Flight ID Type field is set to 'PFD ENTRY' on the
Transponder Configuration Page of the G1000 system, the
crew is required to enter the appropriate flight ID on the
References window of the PFD each time the system is
powered up.
Garmin G1000 Cockpit Reference Guide for Cessna Nav III
NOTE: Please see the Primary Flight Display
Pilot's Guide for further information on entering
a flight ID on the G1000 system.
Acquisition Squitter – Acquisition squitter, or short
squitter, is the transponder transmission (i.e., a 24-bit
identification address) that is sent periodically, regardless
of the presence of interrogations. The purpose of acquisi-
tion squitter is to enable Mode-S ground stations and Traf-
fic Collision Avoidance System (TCAS) equipped aircraft
to become aware of the presence of Mode-S-equipped
aircraft so that the latter can in turn be selectively inter-
rogated.
Traffic Information Service (TIS)
Mode S provides a data link for Traffic Information
Service (TIS). TIS is a ground-based service that sends
out location, direction, altitude and climb/descent infor-
mation relative to all transponder-equipped aircraft within
a specific service coverage volume.
For aircraft not equipped with TCAS, TIS provides a
graphic display of traffic information. TIS displays up
to eight (8) traffic targets within 7.5 nautical miles from
3,000 feet below to 3,500 feet above the requesting air-
craft. TIS data is updated approximately once every five
(5) seconds.
NOTE: TIS is intended only to assist in visual
acquisition of other aircraft in Visual Meteorologi-
cal Conditions (VMC).
NOTE: Please refer to the G1000 Multi Function
Display Pilot's Guide for additional information
on TIS.
SECTION 3 – NAV/COM &
TRANSPONDER
59