KEYS AND KNOBS
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Left-hANd KeyS ANd KNobS
(1) COM Flip-flop Key – Swaps the active and standby
COM frequencies. Press and hold to select emergency
channel (121.500 MHz).
(2) COM Power/Volume Knob – Controls unit power
and communications radio volume. Press momentarily to
disable automatic squelch control.
(3) VLOC Flip-flop Key – Used to swap the active and
standby VLOC frequencies (i.e., make the selected standby
frequency active).
(4) VLOC Volume Knob – Controls audio volume for
the selected VOR/Localizer frequency. Press momentarily
to enable/disable the ident tone.
(5) Small Left Knob (COM/VLOC) – Used to tune
the kilohertz (kHz) value of the standby frequency for
the communications transceiver (COM) or the VLOC
receiver, whichever is currently selected by the tuning
cursor. Press this knob momentarily to toggle the tuning
cursor between the COM and VLOC frequency fields.
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(6) Large Left Knob (COM/VLOC) – Used to tune the
megahertz (MHz) value of the standby frequency for the
communications transceiver (COM) or the VLOC receiver,
whichever is currently selected by the tuning cursor.
RiGht-hANd KeyS ANd KNobS
(7) RNG Key – Allows the pilot to select the desired map
range. Use the up arrow to zoom out to a larger area, or
the down arrow to zoom in to a smaller area.
(8) Direct-to Key – Provides access to the direct-to
function, which allows the pilot to enter a destination
waypoint and establishes a direct course to the selected
destination.
(9) MENU Key – Displays a context-sensitive list of
options. This options list allows the pilot to access
additional features or make settings changes which relate
to the currently displayed page.
(10) CLR Key – Used to erase information, remove map
detail, or to cancel an entry. Press and hold the CLR Key
to immediately display the Default NAV Page.
GNS 530(A) Quick Reference
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190-00181-01 Rev. G
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