Garmin G950 - Page 495

190-00870-02 Rev. A
Garmin G950 Pilot’s Guide for the Pilatus PC-6
SYSTEM
OVERVIEW
FLIGHT
INSTRUMENTS
EIS
AUDIO PANEL
& CNS
FLIGHT
MANAGEMENT
HAZARD
AVOIDANCE
AFCS
ADDITIONAL
FEATURES
APPENDICES INDEX
483
APPENDIX D
Normal (OBS not activated) OBS
• Automatic sequencing of waypoints • Manual sequencing - ‘holds’ on selected waypoint
• Manual course change on HSI not possible • Manually select course to waypoint from HSI
• Always navigates ‘TO’ the active waypoint • Indicates ‘TO’ or ‘FROM’ waypoint
• Must be in this mode for final approach course • Cannot be set for final approach course or published holding patterns
When OBS mode is active, the G950 allows the pilot to set a desired course to/from a waypoint using the
CRS/BARO Knob and HSI (much like a VOR).
The most common application for using the OBS Softkey is the missed approach. The G950 suspends
automatic waypoint sequencing (indicated by a ‘SUSP’ annunciation placed on the HSI) when the missed
approach point (MAP) is crossed. This prevents the G950 from automatically sequencing to the missed approach
holding point (MAHP). During this time, the OBS Softkey designation changes to SUSP . Selecting the SUSP
Softkey reactivates automatic waypoint sequencing. The OBS Softkey then resumes its normal functionality.
Why Might the g950 not autoMatically sequence to the next WayPoint?
The G950 only sequences flight plan waypoints when automatic sequencing is enabled (i.e., no ‘OBS’ or
‘SUSP’ annunciation on the HSI). For automatic sequencing to occur, the aircraft must also cross the bisector of
the turn being navigated. The bisector is a line passing through the waypoint common to two flight plan legs
at an equal angle from each leg.
hoW can a WayPoint Be skiPPeD in an aPProach, a DeParture, or an arriVal?
The G950 allows the pilot to manually select any approach, departure, or arrival leg as the active leg of the
flight plan. This procedure is performed on the MFD from the Active Flight Plan Page by highlighting the
desired waypoint and selecting the ACT LEG Softkey then the ENT Key to approve the selection. The GPS
then provides navigation along the selected flight plan leg.
When Does turn anticiPation Begin?
The G950 smooths adjacent leg transitions based on a normal 15° bank angle (with the ability to roll up to
30°) and provides three pilot cues for turn anticipation:
• A waypoint alert (‘Next DTK ###° in # seconds’ or ‘Next HDG ###° in # seconds’) appears on the PFD 10
seconds before the turn point and flashes as it counts down to zero.
• A flashing turn advisory (‘Turn [right/left] to ###° in # seconds’) appears on the PFD 10 seconds before the
turn and flashes as it counts down to zero. ‘Turn [right/left] to ###° now’ or ‘Next [DTK/HDG] to ###° now’
is displayed when the pilot is to begin the turn and the HSI (GPS mode) automatically sequences to the next
DTK or HDG value.
• The To/From indicator on the HSI flips momentarily to indicate that the midpoint of the turn has been
crossed.