CHAPTER 4, REFERENCE GUIDE
EFD1000 PFD Pilot’s Guide
Page 4-24 A-01-184-00 REV B
EFD1000 PFD Pilot’s Guide
EFD1000 PFD Pilot’s Guide
4.3.4. Course Deviation Indicator and Scale
Selected course deviation is depicted by a Course Deviation Indicator and Scale.
Deviation is indicated by positioning the Course Deviation Indicator on the Scale
corresponding to the lateral deviation value.
The 360° and ARC HSI compass modes display the CDI as a green line centered on the
display and parallel with the course indicator. The scale is a set of four hollow, green
dots that are perpendicular to the CDI (Figure 4-51).
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Course Deviation Indicator
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Course Deviation Scale
The ARC CDI Compass mode’s CDI and Scale are located at the bottom of the lower
display. The indicator is a green diamond and the scale is a set of four hollow, white dots
with a white index mark at the center (Figure 4-52). When in the ARC CDI Compass
mode, on a Localizer Back Course approach, a “BC” label is presented to the left of the
scale and the indicator corrects for reverse sensing (Figure 4-53).
When the lateral deviation exceeds the maximum displayable range of 2.5
dots, the deviation bar or diamond, as applicable, becomes hollow and darker
(Figure 4-54 and 4-55).
Figure 4-51
Deviation Indicator, 360° and ARC HSI
Figure 4-54
Exceeded Deviation, 360° and ARC HSI
Figure 4-52
Course Deviation Indicator, ARC CDI
Figure 4-53
Course Deviation Indicator, ARC CDI with Back Course
Figure 4-55
Exceeded Deviation, ARC CDI
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