Garmin G500 매뉴얼 - 페이지 35

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4.6.2 Course / NAV Selection coupling to the autopilot

When operating the autopilot in NAV mode, the deviation information from the

installed navigation sources (i.e. GPS1, GPS2, NAV1, NAV2) is switched via

the G500 PFD display. Whatever is displayed on the HSI is the NAV source the

autopilot is following. Most autopilots also use the course datum to determine

the best intercept angles when operating in NAV mode.

4.6.3 Heading Bug coupling capability to the autopilot

When operating the autopilot in HDG mode, the difference between the HDG

bug location on the HSI and the actual aircraft heading creates an error signal

which the autopilot will minimize by turning in the direction of the bug. If the

bug is turned more then 180 degrees, the autopilot may turn the airplane in the

opposite direction of the desired turn.

4.6.4

Roll Steering emulated via HDG mode

For autopilots that do not support digital GPSS signals, GPSS functionality may

be emulated by operating the autopilot in HDG mode and selecting GPSS on the

PFD. Depending on the installation, GPSS mode may be toggled via an external

switch located near the autopilot control panel, or by pressing and holding the

HDG button on the PFD. If an external switch is installed, it will be either a

toggle or push-button switch as depicted below.

If the installation uses the HDG button on the PFD, the PFD Knob Mode

Indicator is expanded to label the button function.

GPSS OFF

When GPSS is selected on the PFD, the heading bug on the HSI changes to a

hollow outline and a crossed-out heading bug appears in the PFD Knob Mode

Indicator, indicating that the autopilot is not coupled to the heading bug. The

bug is still controllable and may still be used by the pilot for reference.

AFMS, GARMIN G500 PFD/MFD SYSTEM

FAA APPROVED

AP HDG

DATUM

GPSS

HDG

(toggle switch)

AP HDG

DATUM

GPSS

HDG

(push-button)

GPSS ON

190-01102-01 Rev. 9

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