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Section 2 System Overview
1
st
Ed Nov 2018
IDU-450 EFIS Software Version 8.0H (Rotorcraft)
2-23
Figure 2-10: Time-Critical Caution Alert
Table 2-3: Time-Critical Warning and Caution Alerts in Primary
Field of View
Alert Type Text Color Flash Rate Audio Alert at Full Volume
Red 2
Hz
Repeated until
acknowledged
Amber
(Yellow)
1 Hz
Plays only once
Table 2-4: Time-Critical Warning and Caution Alerts
Visual Alert
Voice Alert
“--” No Voice Alert
Condition
** No time delay
“Warning
Obstruction, Warning
Obstruction”
Obstruction within TAWS FLTA
warning envelope.
Half-second time delay.
“Traffic, Traffic”
Resolution advisory. Not given if
own aircraft at or below 400’
AGL. Not given if target is at or
below 200’ AGL (ground target).
Audio not generated with TCAS-II
system. **
“Warning, Terrain,
Warning Terrain”
Terrain cell within HTAWS FLTA
warning envelope.
Half-second time delay.