CHAPTER 2 CONTROLS AND DISPLAY
EFD1000 VFR PFD Pilot’s Guide
Page 2-30
091-00028-001 ( )
2.3.4.1. Numerical Direction Indicator (Magnetic Compass)
The center of the Navigation Display is the Numerical Direction Indicator. Like a
magnetic compass, the NDI always shows the current magnetic heading of the aircraft.
This NDI compensates both for the turning and acceleration errors exhibited by wet
compasses and for precession errors found in common Directional Gyros. The pilot does
not ever need to make adjustments to the NDI.
The NDIs of both the VFR PFD and the Pro PFD share many common features, while the
Pro PFD adds features for instrument navigation.
The VFR PFD Direction indicator is a course pointer with CDI lateral deviation, to/from
indicator and heading bug.
The Pro PFD Direction Indicator adds an electronic Horizontal Situation Indicator (HSI)
and dual Bearing Pointers.
Compass Modes: 360º vs. ARC
The NDI on the PFD can be presented in either a full 360º Compass Mode (shown in
Figure 2-36), or in a 100º ARC mode (Figure 2-37).
The 360° Compass Mode resembles the mechanical instrument, with the ownship
position in the center of the display.
The ARC Compass Mode provides an extended forward view with the ownship position
near the bottom of the Navigation Display. The ARC Compass is especially good for
displaying ight plan and basemap details.
The 360/ARC Hot Key is used to toggle the display between 360° and ARC Compass
Modes, with the current mode shown in green adjacent to the Hot Key.
Figure 2-36
360° Compass Mode
Figure 2-37
ARC CDI Compass
Mode with Basemap
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