190-00709-00 Rev. A
Garmin G1000 Pilot’s Guide for the Socata TBM 850
D-3
APPENDIX D
Normal (OBS not activated)
• Automatic sequencing of waypoints
• Manual course change on HSI not possible
• Always navigates ‘TO’ the active waypoint
• Must be in this mode for final approach
course
OBS
• Manual sequencing - ‘holds’ on selected
waypoint
• Manually select course to waypoint from
HSI
• Indicates ‘TO’ or ‘FROM’ waypoint
• Cannot be set for final approach course or
published holding patterns
When OBS mode is active, the G1000 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 G1000 suspends
automatic waypoint sequencing (indicated by a ‘SUSP’ annunciation placed on the HSI) when the missed
approach point (MAP) is crossed. This prevents the G1000 from automatically sequencing to the missed
approach holding point (MAHP). During this time, the
OBS
Softkey designation changes to
SUSP
. Pressing
the
SUSP
Softkey reactivates automatic waypoint sequencing. The
OBS
Softkey then resumes its normal
functionality.
W
HY
DOES
THE
G1000
NOT
AUTOMATICALLY
SEQUENCE
TO
THE
NEXT
WAYPOINT
?
The G1000 only sequences flight plan waypoints when automatic sequencing is enabled (i.e., no “OBS” or
‘SUSP’ annunciation). 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.
H
OW
CAN
A
WAYPOINT
BE
SKIPPED
IN
AN
APPROACH
,
A
DEPARTURE
,
OR
AN
ARRIVAL
?
The G1000 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.
W
HEN
DOES
TURN
ANTICIPATION
BEGIN
?
The G1000 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.
