TCAS791
System Description
Pilot’s Guide
1-5
0.2 nmi
0.55 nmi
4 nmi
Max. Display Range
+2700 ft
–2700 ft
+9000 ft
Intruder Aircraft
–9000 ft
*15 seconds for non-altitude reporting intruder aircraft
Not To Scale
+1200 ft
–1200 ft
+800 ft
–800 ft
+600 ft
–600 ft
Max. Display Range
This area or 30 seconds
Sensitivity Level B
This area or 20 seconds
Sensitivity Level A
Look Do
wn (BL
W)
Look Up (ABV)
Nor
mal (NRM)
0 ft
**20 seconds for non-altitude reporting intruder aircraft
*
**
Figure 1-4. Protection Zones
