34 iQue 3600a Que Applications GuideSetting up Your VNAV ProfileThe VNAV Preferences provide settings for thevertical navigation feature. These settings create athree-dimensional profile that guides you from yourpresent position and altitude to a final (target) altitudeat a specified location.To use the vertical navigation feature, your groundspeed must be greater than 35 knots and you must benavigating a Go To or a route.Once the VNAV profile is defined, watch for the tealbar on the HSI and pay attention to the alerts to helpkeep you informed of your progress.As you approach the initial descent point, the time tovertical navigation field (ETV) indicates the time toreach the initial descent point.The descent angle locks to prevent changes in speedfrom altering the profile. The VNAV feature does nottake into account any changes in groundspeed thatoccur during the transition from level flight to descentor climb.VNAV ProfileGlide Ratio to TargetDistance to TargetDistance to ProfileTarget AltitudeAirportVisual representation of VNAVNOTE: The iQue 3600a is a VFR navigationtool and should not be used to performinstrument approaches. VNAV is only a VFRnavigation instrument and is not intended forinstrument approaches.ADVANCED AVIATION OPERATION > SETTING UP YOUR VNAV PROFILE
