Menus; Turning Power On; Satellite Status Screen - Lowrance GlobalMap 100 Installation And Operation Instructions Manual

Menus

Most of the unit's features are found on "menus'. You can view the menus
by pressing the MENU key. This product has "Intelligent Menus". There
are many menus that pertain to only the map, for example. When you
press the MENU key and the plotter is showing, menu items for the plotter
show in addition to the normal menus. For example, if the navigation screen
is showing, and you press the MENU key, plotter menu items won't show
on the list. This helps you find the needed item without scrolling through
unnecessary menus.

Turning Power On

To turn the unit on, simply press the PWR key. A GPS
logo screen appears, then the screen similar to the one
at right appears. Read the message on the screen,
then press the EXIT key to erase it or wait a few sec-
onds and it automatically clears. The screen shown
below appears next.

Satellite Status Screen

This screen appears each time you turn the unit on. It shows a graphical
view of the satellites that are in view. Each satellite is shown on the circu-
lar chart relative to your position. The point in the cen-
ter of the chart is directly overhead. The small inner
ring represents 45° above the horizon and the large
ring represents the horizon. North is at the top of the
screen. You can use this to see which satellites are
obstructed by obstacles in your immediate area if you
hold the unit facing north.
The GPS receiver is tracking satellites that are sur-
rounded by a black box. If the satellite number is not
surrounded by a box, then the receiver hasn't locked
onto that satellite and it isn't being used to solve the position.
Beneath the circular graph are the bar graphs, one for each satellite in
view. Although the unit has twelve channels, it dedicates one channel per
visible satellite. Therefore, if only six satellites are visible, only six bar
charts show at the bottom of the screen. The higher the bar on the graph,
the better the unit is receiving the signals from the satellite.
The number in the upper left corner is the "expected horizontal position
error" or expected error from a benchmark location. In other words, if the
expected error shows 50 feet, then the position shown by the unit is esti-
mated to be within 50 feet of the actual location. Although the expected
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