82046-PG-B1
ST3400H PILOT’S GUIDE
Page 9-3
9.5 Symbology
The ST3400H uses standard RTCA symbology to represent traffic.
Alerting Traffic
DISPLAY
CONDITION
DESCRIPTION
Resolution Advisory
(RA) (Available with
TCAS II Only)
Immediate threat that
requires evasive action.
Note: Vertical guidance
information is NOT
shown on the ST3400H
display.
Traffic Advisory
(TA)
Traffic within 15-30
seconds of closure, or
within 0.20 to 0.55nm
and +/-600 to +/-800 ft
of your aircraft.
No Bearing / No
Altitude Traffic
Advisory
TA with no bearing and
no altitude information
available.
No Bearing Traffic
Advisory
TA with no bearing
information available.
Non-Alerting Traffic
DISPLAY
CONDITION
DESCRIPTION
Proximity Advisory
Traffic within 4nm and
+/-1,200 ft of your
aircraft
Other Traffic
Traffic not representing
an immediate threat
Out of Range Traffic
Alerts outside of the
currently selected
display range will be
shown as a half symbol
against the outer range
ring at the
corresponding bearing.
