Eventide ARGUS 5000 - Waypoint Display on the Argus

Some GPSs allow entry of a "flight plan," or operate in
"leg mode," in which the pilot enters two or more
waypoints. The Argus is capable of displaying up to 32
waypoints, although compatible GPSs (presently) vary
from as few as 3 to up to 21. The Eventide
Compatibility Table and GPS-specific appendices to this
manual give you more information on your particular
GPS. If the GPS is operating in flight plan or leg mode,
the Argus will draw a courseline (if selected) between the
waypoints as designated by the GPS and whose positions
are sent to the Argus for display. Depending upon your
GPS model, waypoints may continue to be visible on
screen after you have passed them, or they may not.
Waypoint Display on the Argus
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Flight Plan with
Multiple waypoints
Waypoints are shown on the Argus screen as four-pointed stars. If an alphanumeric
identifier is sent by the GPS, it will be shown on the screen to the bottom right of the
waypoint star. Again, your GPS may or may not send an identifier; check the
[ ; Compatibility Table.
Just like the permanently mapped facilities and special use airspace stored in the Argus'
database, each waypoint has a. position. Unlike info in the database, however, the
waypoint's position is sent by the GPS. In some cases, that position is sent not as a
precise latitude and longitude, but rather as a bearing and distance. Because of GPS
positional errors, and the fact that bearing and distance numbers are of relatively
limited precision, it is possible that a waypoint display will not physically overlay the
corresponding facility that has been selected as the waypoint. This normally is only
noticeable in the ARRival mode, and then usually when the aircraft is many miles from
the destination. The farther the aircraft is from the destination waypoint, the greater
this potential error. At great distances, it can even cause the arrival facility to be off
screen. This caveat does not apply to waypoints which are sent from the GPS to the
Argus by latitude and longitude; these should correspond precisely with an associated
facility.
Unless you use the Argus FP software (see section 4), all courseline presentations
July 1999 Argus 5000/7000 Ver. 5.xx Reference Manual Part#141003 53