Garmin G1000 Manual

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Garmin G1000 Pilot’s Guide for Cessna Nav III

190-00498-07 Rev. A

446

AUTOMATIC FLIGHT CONTROL SYSTEM

SYSTEM

OVERVIEW

FLIGHT

INSTRUMENTS

EIS

AUDIO PANEL

& CNS

FLIGHT

MANAGEMENT

HAZARD

AVOIDANCE

AFCS

ADDITIONAL

FEATURES

APPENDICESINDEX

VNV TARGET ALTITUDE CAPTURE MODE (ALTV)

NOTE: Armed VNV Target Altitude and Selected Altitude capture modes are mutually exclusive. However,

Selected Altitude Capture Mode is armed implicitly (not annunciated) whenever VNV Target Altitude Capture

Mode is armed.

VNVTargetAltitudeCaptureisanalogoustoSelectedAltitudeCaptureModeandisarmedautomatically

after the VNV Key is pressed and the next VNV Target Altitudeistobeintercepted beforetheSelected

Altitude.Theannunciation‘ALTV’indicatesthattheVNVTargetAltitudeistobecaptured.VNVTarget

Altitudesareshownintheactiveightplanorverticaldirect-to,andcanbeenteredmanuallyorloaded

fromadatabase(seetheFlightManagementSectionfordetails).Atthesametimeas“TODwithin1minute”

isannunciatedintheNavigationStatusBox,theactiveVNVTargetAltitudeisdisplayedabovetheVertical

SpeedIndicator(seeFigure7-11).

AstheaircraftnearstheVNVTargetAltitude,theightdirectorautomaticallytransitionstoVNVTarget

AltitudeCaptureModewithAltitudeHoldModearmed.Thisautomatictransitionisindicatedbythegreen

‘ALTV’annunciationashingforupto10secondsandtheappearanceofthewhite‘ALT’annunciation.The

VNV Target Altitude is shown as the AltitudeReferencebesidethe‘ALTV’annunciationandremainsdisplayed

abovetheVerticalSpeedIndicator.TheRequiredVerticalSpeedIndication(RSVI)isremovedonceVNV

TargetAltitudeCaptureModebecomesactive.

At 50feetfromtheVNV Target Altitude,theight directorautomaticallytransitions from VNVTarget

AltitudeCapturetoAltitudeHoldModeandtracksthelevelleg.AsAltitudeHoldModebecomesactive,the

white‘ALT’annunciationmovestotheactiveverticalmodeeldandashesgreenfor10secondstoindicate

theautomatictransition.TheightdirectorautomaticallyarmsVerticalPathTracking,allowingupcoming

descentlegstobecapturedandsubsequentlytracked.

Altitude Reference (in this case,

equal to VNV Altitude Target)

Figure 7-14 Automatic Mode Transitions During Altitude Capture

Flash up to 10 sec, Indicating Automatic Transition

changing the vnv taRget altitUDe

NOTE: Pressing the CWS Button while in VNV Target Altitude Capture Mode does not cancel the mode.

ChangingthecurrentVNVTargetAltitudewhileVNVTargetAltitudeCaptureModeisactivecausesthe

ightdirectortoreverttoPitchHoldMode.VerticalPathTrackingandtheappropriatealtitudecapture

mode are armed in preparation to capture the new VNV Target Altitude or the Selected Altitude, depending

on which altitude is to be intercepted ﬁrst.

VNV targetaltitudescan bechangedwhile editingtheactive ightplan(see theFlightManagement

Section for details).