BendixKing CAS 67A TCAS II - Manual (Page 82)

ABBREVIATIONS AND DEFINITIONS (CONT’D)
NAR Non-Altitude Reporting traffic.
Non-Threat Intruder An aircraft that has entered the TCAS sur-
veillance volume at a distance greater than
6 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 alti-
tude is used by TCAS to determine the rela-
tive altitude of traffic.
Proximity Intruder An aircraft that is within 6 miles range and
within 1200 feet above or below your own
aircraft but does not meet the TCAS defini-
tion of a threat.
Rad Alt Radio Altitude. Altitude received from a
radio altimeter and used by TCAS to deter-
mine distance to the surface.
RA Resolution Advisory. An audio and visual
indication recommending a vertical maneu-
ver to achieve separation from an intruding
aircraft.
RAs are made up of preventive and correc-
tive maneuvers described in this manual.
RA/VSI Resolution Advisory/Vertical Speed
Indicator. A flight instrument that gives stan-
dard VSI indication plus RA climb and
descend requirements.
Relative Altitude The difference in altitude between two air-
craft.
TCAS calculates relative altitude as the dif-
ference between your own aircraft’s pres-
sure altitude and the encoded pressure alti-
tude of the intruder.
006-08499-0000 Rev 7 Effective Date 2/04 80
Appendix