Garmin G1000 Pilot's Manual page 370

APPENDIX E
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 uses 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 shal-
low angle (either overtaking or head-on), and
either aircraft abruptly changes course within
0.25 nautical miles, 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.
E-2
correction of malfunctions by reporting their observations
of undesirable performance. Reporters 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 as well. Since TIS
performance is monitored by maintenance personnel, not
ATC, malfunctions should be reported in the following
ways:
Garmin G1000 Pilot's Guide for Beechcraft 58/G58
Pilots using TIS can provide valuable assistance in the
• 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).
190-00629-00 Rev. B