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).