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Section 3 Display Symbology
1
st
Ed Nov 2018
IDU-450 EFIS Software Version 8.0H (Rotorcraft)
3-11
Table 3-4: Analog AGL Indicator Markings
Major Tick Marks Minor Tick Marks
50’
60’
70’
80’
90’
100’
200’
300’
400’
500’
1000’
3.3.5. Decision Height
Pilot-settable decision height is displayed above the CDI with the
abbreviation DH and by a yellow radial on the analog indicator. When the
aircraft descends below decision height,
DH ###
turns amber (yellow) and
flashes and the circular tape turns amber (yellow). This is accompanied by
“Decision Height” audible alert.
Figure 3-21: Decision Height
3.3.6. Airspeed
Display
Airspeed is digitally displayed in same color as airspeed scale in knots,
miles, or kilometers per hour with interactive pointer. The airspeed scale is
commensurate with the certification category of the aircraft.