Garmin PDAs & Smartphones G1000 Manual De Usuario

190-00498-07  Rev. A

600

If RAIM is not predicted to be available for the final approach course, the approach does not become  

active, as indicated by the “RAIM not available from FAF to MAP” message and the LOI annunciation 
flagging on the HSI.

For RAIM to work correctly, the GPS receiver must track at least five satellites.  A minimum of six satellites is 

required to allow RAIM to eliminate a single corrupt satellite from the navigation solution.

RAIM ensures that satellite geometry allows for a navigation solution calculation within a specified protection 

limit (2.0 nm for oceanic and en route, 1.0 nm for terminal, and 0.3 nm for non-precision approaches).  The 
G1000 System monitors RAIM and issues an alert message when RAIM is not available (see Appendix A).  
Without RAIM, GPS position accuracy cannot be monitored.  If RAIM is not available when crossing the FAF, 
the pilot must fly the missed approach procedure. 

Approaches are available for the final destination airport in a flight plan or as a direct-to (keep in mind 

that some VOR/VORTAC identifiers are similar to airport identifiers).  If a destination airport does not have a 
published approach, the G1000 indicates “NONE” for the available procedures. 

When an approach, departure, or arrival is loaded into the active flight plan, a set of approach, departure, 

or arrival waypoints is inserted into the flight plan, along with a header line showing the title of the selected 
instrument procedure.  The original en route portion of the flight plan remains active, unless the instrument 
procedure is activated.  This may be done either when the procedure is loaded or at a later time.

Flight plans can also be stored with an approach, a departure, or an arrival.  Note that the active flight plan 

is erased when the system is turned off.  Also, the active flight plan is overwritten when another flight plan is 
activated.  When storing flight plans with an approach, a departure, or an arrival, the G1000 uses the waypoint 
information from the current database to define the waypoints.  If the database is changed or updated, the 
G1000 System automatically updates the information, provided the procedure has not been modified.  Should 
an approach, departure, or arrival procedure no longer be available, the flight plan becomes locked until the 
procedure is deleted from the flight plan.

“/G” may be filed for a flight plan.  The G1000 System meets the requirements of TSO-C145a Class 3 and 

ETSO C145 Class 3 installations.  GPS approaches are not to be flown with an expired database.  See the 
approved Pilot’s Operating Handbook (POH) as well as the Aeronautical Information Manual (AIM) for more 
information.

The OBS Softkey is used to select manual sequencing of waypoints.  Activating OBS mode sets the current 

active-to waypoint as the primary navigation reference and prevents the system from sequencing to the next 
waypoint in a flight plan.  When OBS mode is cancelled, automatic waypoint sequencing is continued, and 
the G1000 automatically activates the next waypoint in the flight plan once the aircraft has crossed the present 
active waypoint.