Garmin Flight Deck 100 Marine Instruments User Manual


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190-00728-04 Rev. A
Embraer Prodigy
®
Flight Deck 100 Pilot’s Guide
662
APPENDIX E
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.
NOTE
: TIS is unavailable at low altitudes in many areas of the United States. This is often the case in
mountainous regions.
TIS information is collected during a single radar sweep. Collected information is then sent through the
Mode S uplink on the next radar sweep. Because of this, the surveillance information is approximately five
seconds old. TIS ground station tracking software uses prediction algorithms to compensate for this delay.
These algorithms use track history data to calculate expected intruder positions consistent with the time of
display. Occasionally, aircraft maneuvering may cause variations in this calculation and create slight errors on
the Traffic Map Page. Errors affect relative bearing information and target track vector. This can cause a delay in
the displayed intruder information. However, intruder distance and altitude typically remain relatively accurate
and may be used to assist in spotting traffic.
The following errors are common examples:
•Whentheclientorintruderaircraftmaneuversexcessivelyorabruptly,thetrackingalgorithmmayreport
incorrect horizontal position until the maneuvering aircraft stabilizes.
•Whenarapidlyclosingintruderisonacoursethatinterceptstheclientaircraftcourseatashallowangle
(either overtaking or head-on) and either aircraft abruptly changes course within 0.25 nm, TIS may display
the intruder aircraft on the incorrect side of the client aircraft.
These are rare occurrences and are typically resolved within a few radar sweeps once the client/intruder
aircraft course stabilizes.
Pilots using TIS can provide valuable assistance in the correction of malfunctions by reporting observations
of undesirable performance. Reports should identify the time of observation, location, type and identity of
the aircraft, and describe the condition observed. Reports should also include the type of transponder and
transponder software version. Since TIS performance is monitored by maintenance personnel, not ATC,
malfunctions should be reported in the following ways:
•BytelephonetothenearestFlightServiceStation(FSS)facility
•ByFAAForm8000-7,SafetyImprovementReport(postage-paidcardcanbeobtainedatFAAFSSs,General
Aviation District Offices, Flight Standards District Offices, and General Aviation Fixed Base Operators)
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