Revision G
October 14, 1996 5
2.2. OPERATION (CONTINUED)
When the OBS/TEST push-button is pushed with the NAV 1 switch in the OBS position, the
unit tests all light bars and digital segments. During test, the light bars are strobbed and 8’s
are displayed in each of the digit windows.
2.3. FLYING THE ECDI
A. Finding Aircraft Position
1. Tune desired NAV frequency and identify.
2. Set TO/OBS/FR/BC selector FR.
3. Course display shows radial aircraft is on from the VOR.
B. Tracking Direct to the VOR Station
1. Tune desired NAV frequency and identify.
2. Set TO/OBS/FR/BC selector switch to “TO”.
3. Push OBS/TEST button and immediately switch TO/OBS/FR/BC switch to
OBS; display will center, turn aircraft toward arrow and maintain aircraft on
course “TO” the VOR.
4. Keep course deviation bar centered by making small aircraft heading
changes.
NOTE: Turn aircraft in direction of arrows, i.e., if bar is going left, left
arrow will light, turn left to get back on course.
C. Flying a VOR Airway
1. Tune desired NAV frequency and identify.
2. Determine aircraft position (see A above).
3. Set TO/OBS/FR/BC selector to OBS.
4. Select desired radial with OBS course selector knob.
5. Set up intercept and fly to course radial.
6. When deviation bar centers, turn on course.
D. ILS Approaches
1. Tune desired NAV frequency and identify.
2. Display shows deviation from localizer and glide slope center. That is, if the
deviation bar indicates deviation up, then you need to fly up to return to glide
slope center.
3. The course display may be set to the localizer course as a reminder.
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