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Section 3 Display Symbology
1
st
Ed Nov 2018
IDU-450 EFIS Software Version 8.0H (Rotorcraft)
3-59
Figure 3-96: HSI Bearing Distance Readout with DME in HOLD
Valid marker beacon discretes are displayed on the PFD and ND HSI with
appropriate coloring markings. Only during a built-in-test, more than one
marker beacon may be active. Marker beacons are disabled when the NAV
source is FMS.
Figure 3-97: HSI with Marker Beacon Displayed
3.5.3. Compass Rose Symbols
When selected, a digital heading readout and pointer aligned with the
longitudinal axis of the ownship symbol appear on the compass rose
boundary circle.
Normal Mode
True North Mode
Figure 3-98: Compass Rose
If referenced to magnetic north, the heading readout uses the degree (°)
symbol. Otherwise, a stylized true north (
T
) symbol is used. A green
diamond-shaped track pointer is aligned with the aircraft’s track across the
earth appears on the compass rose when groundspeed is greater than 30
kts. The pilot-settable heading bug geometrically interacts with the heading