TAWS Operation
600-00078-001 Rev 05 -49- Avidyne EX500/EX600 MFD
5.2 TAWS Operation
Terrain and obstacle alerts are the most critical situations displayed
by TAWS. There are two levels of alerts: They are:
● Caution - Possible terrain or obstacle conflict within 40-60
seconds.
● Warning - Possible terrain or obstacle conflict within 30 seconds.
Note: At the maximum range settings of 240nm and 320nm, terrain
data for portions of the display beyond 320 nm might not be
available. At these range settings, portions of the display that
represent distances greater than 320 nm might be black even
though significant terrain is present. The occasional loss of
this display data occurs at the extreme limits of the EGPWS
but does not compromise safety or terrain awareness.
When a caution alert is triggered, the terrain or obstacle that caused
the alert displays in bright yellow, as shown below. Also, a message
describing the nature of the alert is presented in the message bar.
Figure 5.2 Terrain Caution Condition
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