User manual

Page 86
Aircraft Operation Manual
Piper Cheyenne I, IA, II, IIXL
For ight simulation use only
NOTE
For the TCAS to operate your active transponder needs to be in
mode ON or ALT.
The digital VSI gauge contains a full-edged implementation of TCAS II version
7.0 (aka change 7.0 aka MOPS 7.0) logic, as specied by RTCA document DO-185A
plus its amendments approved by SC-147A. Literally all features of the logic are
implemented with the exception of TCAS/TCAS resolution advisory (RA) negotia-
tion and Mode S ground stations.
Trafc Display Symbology
Both color and shape are used to assist the pilot in interpreting the displayed
information.
The own aircraft is depicted as either a white or cyan arrowhead or airplane-like
symbol. The location of the own aircraft symbol on the display is dependent on
the display implementation. Other aircraft are depicted using geometric symbols,
depending on their threat status, as follows:
• An unlled diamond, shown in either cyan or white, but not the same color as
the own aircraft symbol, is used to depict non-threat trafc.
• A lled diamond, shown in either cyan or white, but not the same color as the
own aircraft symbol, is used to depict Proximate Trafc. Proximate Trafc is non-
threat trafc that is within 6 nmi and ±1200 ft from own aircraft.
• A lled amber or yellow circle is used to display intruders that have caused a TA
to be issued.
• A lled red square is used to display intruders that have caused an RA to be
issued.
Each symbol is displayed on the screen according to its relative position to own
aircraft. To aid the pilot in determining the range to a displayed aircraft, the
trafc display provides range markings at one-half the selected scale and at the
full scale. The selected display range is also shown on the display. The range mar-
kings and range annunciation are displayed in the same color as the own aircraft
symbol.