BendixKing KTA 910 System KTA 970 - Manual (Page 41)

KTA 870/KMH 880 Pilot’s Guide
Rev 2 006-18265-0000
33
TAS Appendix
Mode S Transponder Transponder that replies to ATC interrogations
giving an ATCRBS identification code, encoded altitude and other data
fields including discrete aircraft address and airspeed capability.
NAR Non-Altitude Reporting traffic.
Non-Threat Intruder An aircraft that has entered the TAS surveillance
volume at a distance greater than 5 miles or altitude greater than 1200
feet above or below your own aircraft.
Pressure Altitude Indicated altitude when barometric pressure is set to
29.92” Hg. (1013mb). Pressure altitude is used by TAS to determine the
relative altitude of traffic.
Proximity Intruder An aircraft that is within 5 miles range and within
1200 feet above or below your own aircraft but does not meet the TAS
definition of a threat.
Rad Alt or RALT Radio Altitude is the height above the ground as deter-
mined by a radio altimeter. RALT is used by TAS to inhibit TAs close to
the surface. Radio altitude above terrain is absolute. As such, RALT
height is sometimes referred to as absolute altitude in some systems.
RALT systems typically function below 2,500 ft AGL.
Relative Altitude The difference in altitude between two aircraft. TAS
calculates relative altitude as the difference between your own aircraft’s
pressure altitude and the encoded pressure altitude of the Intruder.
Self Test A functional test that determines equipment status. Self test
differs from BITE performance monitoring because it is initiated by the
crew and is not performed continually or automatically.
Sensitivity Level TAS has two sensitivity levels (SL). SL A shall be
automatically invoked using the following order of precedence: (1) when
the TAS aircraft is below 2,000 feet AGL (if equipped with radio altime-
ter) OR (2) when the landing gear is Extended (no radio altimeter
installed). SL B occurs under all other flight conditions. If aircraft is not
equipped with either a radio altimeter or retractable landing gear, TAS
shall stay in SL B at all times.
Surveillance Volume The volume of airspace surrounding your aircraft
that TAS scans for Intruding traffic. The TAS system scans approxi-
mately 20 NM around and 10000 feet above and below the aircraft. The
volume will automatically begin to decrease when flying into a high den-
sity area.
TA Traffic Advisory. An audio and visual indication that another aircraft
is a potential threat.
Threat An aircraft that has satisfied TAS threat detection logic and thus
requiring a Traffic Advisory.