4-31
190-01150-02 Rev. J
Garmin G500H Pilot’s Guide
For
ewor
d
Sec 1
System
Sec 2
PFD
Sec 3
MFD
Sec 4
Hazar
d
Avoidance
Sec 5
Additional
Featur
es
Sec 6
Annun.
& Alerts
Sec 7
Symbols
Sec 8
Glossary
Appendix A
Appendix B
Index
4.6.2.3
TIS Limitations
NOTE:
This section on TIS Limitations is not comprehensive. Garmin
recommends the user review the TIS Limitations section of the Aeronautical
Information Manual, Section 1-3-5.
TIS is NOT intended to be used as a collision avoidance system and does not
relieve the pilot of responsibility to “see and avoid” other aircraft. TIS should not
be used for avoidance maneuvers during IMC or other times when there is no
visual contact with the intruder aircraft. TIS is intended only to assist in visual
acquisition of other aircraft in VMC. No recommended avoidance maneuvers
are provided for, nor authorized, as a direct result of a TIS intruder display or
TIS advisory.
While TIS is a useful aid to visual traffic avoidance, it has some system
limitations that must be fully understood to ensure proper use. Many of these
limitations are inherent in secondary radar surveillance. In other words, the
information provided by TIS will be no better than that provided to ATC. TIS
will only display aircraft with operating transponders installed.
TIS relies on surveillance of the Mode S radar, which is a “secondary
surveillance” radar similar to the ATCRBS. TIS operation may be intermittent
during turns or other maneuvering. TIS is dependent on two-way, “line-of-
sight” communication between the aircraft and the Mode S radar. Whenever the
structure of the client aircraft comes between the transponder antenna (usually
located on the underside of the aircraft) 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 1-3-5.
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