Garmin G1000 Series, Pilot'S Manual

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Garmin G1000 Pilot’s Guide for the Diamond DA40
190-00592-00 Rev. A E-1
APPENDIX E
GENERAL TIS INFORMATION
INTRODUCTION
The Traffic Information Service (TIS) provides traf-
fic advisory information in the cockpit of non-TCAS
equipped aircraft. TIS is a ground-based service provid-
ing relative location of all ATCRBS Mode-A and Mode-C
transponder equipped aircraft within a specified service
volume. The TIS ground sensor uses real time track re-
ports to generate traffic notification. The G1000 system
displays TIS traffic information on the Traffic Map Page of
the MFD. TIS information may be displayed for overlay
on the default map page on the MFD, as well as on the
PFD map inset. Surveillance data includes all transpon-
der-equipped aircraft within the coverage volume. The
G1000 system displays up to eight traffic targets within a
7.5 nautical mile radius, from 3,000 feet below, to 3,500
feet above the requesting aircraft.
NOTE: Aircraft without an operating transponder
are invisible to TIS.
TIS VS. TCAS
The main difference between TIS and TCAS is the
source of surveillance data. TCAS uses an airborne inter-
rogator with a half-second update rate, while TIS utilizes
the terminal Mode-S ground interrogator and accompany-
ing data link to provide a five-second update rate. TIS and
TCAS both have similar ranges.
TIS LIMITATIONS
This section describes basic TIS limitations and is not
comprehensive. The pilot should review the TIS Limi-
tations section of the Aeronautical Information Manual
(AIM), Section 1-2-5.
NOTE: TIS is NOT intended to be used as a
collision avoidance system and does not relieve
the pilot of the responsibility to “see and avoid”
other aircraft. TIS shall not be used for avoidance
maneuvers during IMC or when there is no visual
contact with the intruder aircraft.
TIS is intended only to assist in visual acquisition
of other aircraft in VMC conditions. No recommended
avoidance maneuvers are given, nor authorized, as a di-
rect result of a TIS intruder display or TIS advisory.
While TIS is a useful aid to visual traffic avoidance,
system limitations must be fully understood to ensure
proper use. Many limitations are inherent in secondary
radar surveillance. Information provided by TIS is nei-
ther better nor more accurate than the information used
by ATC.
TIS relies on surveillance of the Mode-S radar system,
which is a “secondary surveillance” radar system similar
to that used by ATCRBS. TIS operation may be intermit-
tent during turns or other maneuvering. TIS is depen-
dent on two-way, line-of-sight communications between
the aircraft and the Mode-S radar antenna. Whenever the
structure of the aircraft comes between the transponder
antenna and the ground-based radar antenna, the signal
may be temporarily interrupted. Other limitations and
anomalies associated with TIS are described in the AIM,
Section 1-2-5.
WARNING: Garmin is not responsible for Mode S
geographical coverage. Operation of the ground
stations is the responsibility of the FAA. Refer to
the AIM for a Terminal Mode S radar site map.