Garmin G1000 King Air C90GT - Manual (Page 44)

190-00663-01 Rev. A Garmin G1000 Pilot’s Guide for the Hawker Beechcraft C90A/GT 30
SYSTEM OVERVIEW
SY
STEM
O
VER
VIEW
FLIGHT
INSTRUMENTS
EIS
AUDIO P
ANEL
& CNS
FLIGHT
MANA
GEMENT
HAZARD
AV
OID
ANCE
AFCS
ADDITIONAL FEA
TURES
APPENDICES
INDEX
• ‘COMPUTE RAIM?’—RAIM has not been computed for the current waypoint, time, and date combination
• ‘COMPUTING AVAILABILITY’—RAIM calculation in progress
• ‘RAIM AVAILABLE’—RAIM is predicted to be available for the specified waypoint, time, and date
• ‘RAIM NOT AVAILABLE’—RAIM is predicted to be unavailable for the specified waypoint, time, and date
• SBAS Selection (SBAS Softkey is selected)
In certain situations, such as when the aircraft is outside or on the fringe of the WAAS coverage area, it may
be desireable to disable WAAS (although it is not recommended). When disabled, the SBAS field in the GPS
Status box indicates DISABLED.
Disabling WAAS
1) Select the GPS Status Page.
2) If necessary, select the SBAS Softkey.
3) Press the FMS Knob, and turn the large FMS Knob to highlight ‘MSAS’ or ‘WAAS’.
4) Press the ENT Key to uncheck the box.
5) Press the FMS Knob to remove the cursor.
• GPS Satellite Signal Strengths
The GPS Status Page can be helpful in troubleshooting weak (or missing) signal levels due to poor satellite
coverage or installation problems. As the GPS receiver locks onto satellites, a signal strength bar is displayed
for each satellite in view, with the appropriate satellite PRN number (01-32 or 120-138 for WAAS) below each
bar. The progress of satellite acquisition is shown in three stages, as indicated by signal bar appearance:
- No bar—Receiver is looking for the indicated satellite
- Hollow bar—Receiver has found the satellite and is collecting data
- Light blue bar—Receiver has collected the necessary data and the satellite signal can be used
- Green bar—Satellite is being used for the GPS solution
- Checkered bar—Receiver has excluded the satellite (Fault Detection and Exclusion)
- “D” indication—Denotes the satellite is being used as part of the differential computations
Each satellite has a 30-second data transmission that must be collected (signal strength bar is hollow) before
the satellite may be used for navigation (signal strength bar becomes solid).
1.7 ACCESSING G1000 FUNCTIONALITY
MENUS
The G1000 has a MENU Key that, when pressed, displays a context-sensitive list of options. This options list
allows the user to access additional features or make settings changes which specifically relate to the currently
displayed window/page. There is no all-encompassing menu. Some menus provide access to additional
submenus that are used to view, edit, select, and review options. Menus display ‘NO OPTIONS’ when there are
no options for the window/page selected. The main controls used in association with all window/page group
operations are described in section 1.3. Softkey selection does not display menus or submenus.