Raytheon RayChart 620 Operation Manual page 18

Chapter 2: Getting Started
2. When you have read the notice, press the soft key below the
3. If you do not wish to wait for the position fix, you can clear the search
CONTINUE label to clear it.
The Fix Status window is displayed, as shown in the following
example for a GPS position fixer.
The right side of the window shows a representation of the satellite
positions, with each satellite identified by a number. The bargraphs
on the left indicate the signal strength for each of the currently
located satellites. Initially, the RayChart uses the predicted satellite
positions, and the bargraphs are blank until the satellites are
located.
The RayChart searches for the strongest signals: at least four are
required for an accurate position fix. If the signals from the currently
located satellites are not strong enough, the RayChart searches for
other satellites and displays these in turn.
Once a position fix has been established, the chart is displayed, as
described on the following pages.
graphics and display the chart by pressing the key below the
CHART label. (You can redisplay the Fix Status window later if
required, as described in Chapter 6.)
A "Fix Alarm" message is displayed, that you can clear by pressing
any key. The unit will beep every few seconds to indicate that there
is no position fix, until the position has been established.
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