Garmin GNS 480, Pilot'S Manual

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32
Basic Operation
The compass rose rotates to align with the track angle of your aircraft at the top. Tick marks are placed every
10 degrees with a larger one every thirty degrees. Small triangles are positioned at 45 degrees to the left and
right of your current track at the top of the compass rose circle as an aid in intercepting courses.
A lubber line is centered at the top of the compass rose circle. The ownship (your aircraft) symbol is at the
center of the HSI and always points straight up to your current track. The CDI arrowhead is shown at the top
of the HSI just under the lubber line. When GPS navigation is selected, the CDI arrowhead is magenta and is
aligned with your desired track angle. If OBS mode is active the CDI arrowhead will align to the current OBS
course input angle instead of the desired track. If LOC, ILS, or VOR navigation is selected, the CDI arrowhead
is green and is aligned with your the OBS course input.
The CDI line is the long vertical line in the center of the HSI and will move horizontally to represent cross-
track deviation. The CDI line will match the color of the CDI arrowhead. The CDI line doubles in thickness
when cross-track deviation reaches or goes beyond full-scale deflection. Five equally spaced dots are placed on
either side of the center of the HSI. The fifth dot represents full-scale deflection.
A white triangle above the center of the HSI points in the same direction of the CDI arrowhead if the CDI is in
the To state. The white triangle will be below the center of the HSI and point in the opposite direction of the
CDI arrowhead if the CDI is in the From state.
LPV, LP, Lnav/Vnav, or Lnav annunciations are centered and appear below the compass rose when these ap-
proaches are active. The approach type is displayed in green if HPL and VPL alarm limits are met and yellow if
they do not.
The VDI is displayed on the left side of the display when LPV or Lnav/Vnav approaches meet the requirements
for VDI being active and when glideslope is active during ILS navigation guidance. The vertical path indication
is shown with a magenta triangle for GPS-based navigation or a green triangle for ILS-based navigation. The
vertical bar line represents the proportionate distance relative to full-scale vertical deviation from the center.
The VDI is not displayed for LP approaches.
Selecting Displayed Nav Data
Information
1. Press the Menu/Enter key.
2. Press the Nav Data menu item key and
while it is highlighted press the Sel Data
menu item key.
3. While both Nav Data and Sel Data keys
are highlighted, you may now select Nav
Data items displayed on the left side of the
display.
4. Note that the top Nav Data item is
highlighted. Turn the Large knob to move
the highlight to other items. Turn the
Small knob to scroll through the available
Nav Data items.
5. After selecting the desired items, press
either the Menu/Enter or Sel Data keys.
NAV / VDI