Version 2.0
79
Man Over Board O
perator’s Manual
approach. Note for the plot example above, we turned off the cross-
track error lines, the active route, and track saving to keep the screen
from getting cluttered while drifting.
Grid Search
If you are attempting to search a given area, you can use the
PLOT2
screen to define a known coordinate in your search pattern, then use
both the
PLOT1
and
PLOT2
screens to view your progress and help
maintain your proper separation. You can also use the
RTE1
screen’s
Insert New WPT
feature in conjunction with the
CFG1
Navigation,
WPT Pass Criterion: Distance to WPT
(set the
WPT Pass Distance:
to
the smallest acceptable value) to create the search pattern you want to
follow. In the
RTE1
screen, press
Insert New WPT
to define the coor-
dinates of the first waypoint. Then use the
Insert New WPT
softkey to
define subsequent range and bearing coordinates from your original
position. This technique allows you to quickly define your search
pattern, control the pattern separation, and view your progress along
the way. The CDU will prompt you to turn at the predetermined
waypoints you defined. This allows you to pay more attention to the
task at hand, rather than having to keep a close eye on the GPS re-
ceiver.
Man Over Board
The Man Over Board function key is located at the bottom right hand
corner of the CDU. When depressed for a few seconds, it activates a
number of automatic functions described below. You can also active it
by pressing
E
and selecting the
Activate MOB
softkey.
Most obviously, it brings up an
MOB1
(Plot) screen. This is an auto-
matic scaling screen. The screen centers on half the distance between
your present position and the MOB position. In addition, the MOB
position is displayed in the upper left corner, so that you can quickly
read the coordinates to others who may be available to render assis-
tance. This plot screen also provides the vital bearing and distance
back to the MOB position, as well as your present course over ground.
Summary of Contents for MX420
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