Pilot's Guide

190-009663-03 Rev. A Garmin G1000 Pilot’s Guide for the Beechcraft C90A/GT/GTi 117
AUDIO PANEL AND CNS
4.3 NAV OPERATION
NAV RADIO SELECTION AND ACTIVATION
The NAV Frequency Box is composed of four fields; two standby fields and two active fields. The active
frequencies are on the right side and the standby frequencies are on the left.
Press the CDI Softkey on the PFD to select a NAV radio for navigation. The active NAV frequency selected for
navigation is displayed in green. Selecting the CDI Softkey once selects NAV1 as the navigation radio. Selecting
the CDI Softkey a second time selects NAV2 as the navigation radio. Selecting the CDI Softkey a third time
activates GPS mode. Selecting the CDI Softkey again cycles back to NAV1.
While cycling through the CDI Softkey selections, the selected NAV standby frequency is selected for tuning,
the Frequency Transfer Arrow is placed in the selected NAV Frequency Field, and the active NAV frequency
color changes to green.
The three navigation modes that can be cycled through are:
• VOR1 (or LOC1) – If NAV1 is selected, a green single line arrow (not shown) labeled either VOR1 or LOC1
is displayed on the HSI and the active NAV1 frequency is displayed in green.
• VOR2 (or LOC2) – If NAV2 is selected, a green double line arrow (shown) labeled either VOR2 or LOC2 is
displayed on the HSI and the active NAV2 frequency is displayed in green.
• GPS – If GPS Mode is selected, a magenta single line arrow (not shown) appears on the HSI and neither NAV
radio is selected. Both active NAV frequencies are then displayed in white and the previously selected NAV
standby frequency remains selected for tuning.
Figure 4-17 Selecting a NAV Radio for Navigation
Active
Fields
Standby
Fields
Selected for
Tuning
The NAV Radio is
Selected by Selecting
the
CDI Softkey
See the Flight Instruments Section for selecting the DME and Bearing Information windows and using VOR
or ADF as the source for the bearing pointer.