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CHAPTER 5: AIRCRAFT
slaved with the compass and will precess. As in the actual
aircraft, it must be adjusted.
The orange arrow ( heading bug) can be set with the rotary
dial at the bottom right.
The DG/ADF confi guration can be changed to an HSI/
RMI confi guration in some ELITE aircraft such as the Piper
Arrow IV. See the Air craft Information section on how to
do this.
HORIZONTAL SITUATION INDICATOR
The Horizontal Situation Indicator (HSI) is connected to
the NAV1 receiver. It consists of a turning compass card,
a yellow course pointer (CDI) turned by the left rotary dial,
an orange heading bug moved by the right rotary dial and
a yellow glide slope mark on both sides (when on ILS). The
actual course is indicated by the white lubber line on the
compass card. The HSI replaces the standard directional
gyro in the aircraft’s panel, combining slaved heading
and VOR/LOC/Glideslope deviation information into one
compact display.
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