(approximately 1 nm for every 100 nm/h or about 36 seconds) to the
next destination waypoint.
Approach Annunciator Summary
Device or
Annunciator
En route Approach
Transition
Approach
Active
Appr. Trans.
(Missed Appr)
CDI Sens. 5 nm* 1 nm 0.3 nm 1 nm
Approach Off On On On
Active Off Flashes 3 nm
from FAF
On Off
OBS/HOLD Off* Off* Auto-On
for MAP* Auto-On for
MAHP*
* Default is shown, but the value is user-selectable
CAUTION
The Apollo NMS and the U.S. GPS Satellites use the World
Geodetic System 1984 (WGS-84) horizontal datum for
latitudes and longitudes. Approach plate or approach
procedure data must be referenced to the WGS-84 or North
American Datum 1983 (NAD-83) in order to use the
approach. NAD-83 is for all practical purposes identical to
the WGS-84 datum. All published U.S. and Canadian
approach charts meet this criterion. Prior to using the
Apollo NMS for any GPS approach other than a published
U.S. or Canadian approach, you must first verify that the
approach charts and approach waypoints use the WGS-84
or NAD-83 reference system. If the approach data is
referenced to any other coordinate system, it can result in
an unsafe position error.
The Apollo NMS database contains approach information.
It is very important that the pilot verify that approach data
is current prior to use. The approach data contained in the
Apollo NMS does not replace or eliminate the need for
Approach Plates or published Approach Procedures.
Some approach procedures may not be suitable for the
Apollo NMS operational characteristics and may be
omitted from the Apollo NMS database. Since an approach
must be in the database in order to be selected and flown
using the Apollo NMS, it is good pre-flight practice to make
sure that the database contains anticipated approaches.
260
Approach Operations Operations
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