1 2 3 4 5 6 VLOC Volume COM Power/Volume VLOC Flip-flop COM Flip-flop CLR (clear) Direct-to 
 Large left knob Large right knob Small left knob Small right knobCDI OBS MSG (message) FPL (flight plan) PROC (procedures) ENT (enter) MENU RNG (map range) 
Left-haNd KeyS aNd KNobS  The small left knob is used to tune the kilohertz (kHz) 

value of the standby frequency for the COM transceiver
The COM Power/Volume Knob controls unit power or the VLOC receiver, whichever is currently selected by and communications radio volume. Press momentarily to the tuning cursor. Press this knob momentarily to toggle disable automatic squelch control. the tuning cursor between the COM and VLOC frequency
The VLOC Volume Knob controls audio volume for fields. the selected VOR/Localizer frequency. Press momentarily The COM Flip-flop Key is used to swap the active to enable/disable the ident tone. and standby COM frequencies. Press and hold to select
The large left knob is used to tune the megahertz (MHz) emergency channel (121.500 MHz). value of the standby frequency for the COM transceiver or The VLOC Flip-flop Key is used to swap the active the VLOC receiver, whichever is currently selected by the and standby VLOC frequencies (i.e., make the selected tuning cursor. standby frequency active).

RiGht-haNd KeyS aNd KNobS
The RNG Key allows the pilot to select the desired map range. Use the up arrow of the key to zoom out to a larger area, or the down arrow to zoom in to a smaller area.
The 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.
The 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.
The CLR Key is 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.
The ENT Key is used to approve an operation or complete data entry. It is also used to confirm information, such as during power on.
The large right knob is used to select between the various page groups: NAV, WPT, AUX, or NRST. With the on-screen cursor enabled, the large right knob allows the pilot to move the cursor about the page. The large right knob is also used to move the target pointer right (turn clockwise) or left (counterclockwise) when the map panning function is active.
The small right knob is used to select between the various pages within one of the groups listed above. Press this knob momentarily to display the on-screen cursor. The cursor allows the pilot to enter data and/or make a selection from a list of options. The small right knob is also used to move the target pointer up (turn clockwise) or down (counterclockwise) when the map panning function is active.
　
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