Garmin GPS 400W Pilot's Manual & Reference page 203

What happens when I select an approach? Can I store a
flight plan with an approach, departure or arrival?
Whenever you load an approach, departure or arrival
into the active flight plan, a set of approach, departure or
arrival waypoints is inserted into the flight plan—along
with a header line describing the instrument procedure
you selected. The original en route portion of the flight
plan will remain active, unless you "Activate" the instru-
ment procedure; which may be done when the procedure
is loaded or at a later time.
Flight plans can also be stored with an approach, de-
parture or arrival. Keep in mind that the active flight plan
is erased when the unit is turned off and overwritten when
another flight plan is activated. When storing flight plans
with an approach, departure or arrival, the 400W-series
unit will use the waypoint information from the cur-
rent database to define the waypoints. If the database is
changed or updated, the 400W-series unit will automati-
cally update the information if the procedure has not been
modified. If an approach, departure or arrival procedure
is no longer available, the flight plan will become locked
until the procedure is deleted from the flight plan or the
correct database is installed. For information on loading
an approach, departure or arrival. See Section 4 - Flight
Plans for instructions on saving and copying flight plans.
Can I file slant Golf ("/G") using my GPS?
Yes, you may file your flight plan as /G if your 400W-
series unit is an authorized IFR installation. The 400W
series is a TSO C146a Gamma-3 (Class 3) authorized
GPS navigator. If you are flying en route, you may file
/G with an expired database only after you have verified
all route waypoints. Approaches may not be flown with
an expired database. See your approved Airplane Flight
Manual Supplement for more information.
What does the OBS key do and when do I use it?
The OBS key is used to select manual (OBS mode) or
to suspend automatic sequencing of waypoints. Activat-
ing OBS mode (as indicated by an
directly above the OBS key) holds your current "active to"
waypoint as your navigation reference and prevents the
GPS from sequencing to the next waypoint. When OBS
mode is cancelled, automatic waypoint sequencing is se-
lected, and the 400W-series unit will automatically select
the next waypoint in the flight plan once the aircraft has
crossed the present active-to waypoint.
NORMAL
(no "OBS" annunciator)
Automatc sequencng of
wayponts
Change n HSI does not
affect CDI deflecton
Always navgates "TO" the
actve waypont
Must be n ths mode for
fnal approach course
Whenever OBS mode is active, the 400W-series unit
allows you to select the desired course to/from a waypoint
using the HSI (much like a VOR) and display a to/from
190-00356-00 Rev B
APPENDIX C
Troubleshooting Q & A
annunciation
OBS
Manual sequencng-
"holds" on selected
waypont
Manually select course to
next waypont from HSI
Wll ndcate "TO" or
"FROM" waypont
Cannot be set for fnal ap-
proach course or publshed
holdng patterns
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