I A P 2 0 2 3 . 0 0 1 - A F M / I R I S T E X A N I I P A G E | 143
FOR SIMULATION USE ONLY – NOT A TRAINING AID
The glideslope and localizer indicators are used to show deviations from the
desired path on an instrument landing system (ILS) approach. They are only
displayed when the VOR/ILS system is the selected navigation source and is tuned
to an ILS frequency.
The glideslope indicator displays the current vertical deviation from the ILS
glideslope. It consists of a horizontal centre marker with unfilled circles above and
below the scale, and a diamond pointer to represent the glideslope.
The diamond pointer is displayed above the centre marker when the aircraft is
below the glideslope and below the centre marker when the aircraft is above the
glideslope.
The diamond pointer pegs on the scale when the inner edge of the pointer touches
the outer edge of one of the outer scale circles. If the aircraft is below 2500 feet
AGL and the glideslope pointer has been on the scale for 5 seconds or more and
then goes off the scale, the pointer flashes.
The localizer indicator displays the lateral deviation from the ILS approach path. It
consists of a vertical centre marker with unfilled circles to the left and right for the
scale, and a diamond pointer to represent the approach centreline.
The diamond pointer is displayed to the left of the centre marker when the aircraft
is to the right of the approach path and to the right of the centre marker when the
aircraft is to the left of the approach path. The diamond pointer pegs on the scale
when the inner edge of the pointer touches the outer edge of one of the outer scale
circles.
Horizontal Situation Indicator
The horizontal situation indicator (HSI), makes up the lower half of the PFD display,
provides primary heading in addition to primary navigation display, course selection
indication, NAV source annunciation, localizer deviation, and selected heading bug.
COMPASS ROSE
The compass rose rotates as the aircraft heading changes such that the current
aircraft heading is always located at the top of the display. The scale also
incorporates fixed tick marks on the outside of the scale at 45°, 90°, 135°, 180°, 225°,
270° and 315° from the top of the scale to allow pilots to easily read the headings at
45° increments.
There are also alpha-numeric graduation marks (N, 3, 6, E, 12, 15, S, 21, 24, W, 30, 33)
displayed every 30° along the 360° rotating compass scale. Major graduation marks
are displayed every 10° along the 360° rotating compass scale, except for those 30°
locations where the alpha-numeric graduation marks appear.
To Next Page
Loading...