12
RayChart 620 and 630
Turning the
Chartplotter
On and Off
➤ To switch the chartplotter off, press and hold the POWER key for three
seconds. A countdown timer is displayed, and if you release the key before the
timer reaches zero the chartplotter will remain on. Otherwise, when the timer
reaches zero the chartplotter display is cleared and the key lights go off.
Fix Status Window
D3838-2
CURSOR
50°36.68 N
009°47.60 E
COG SOG
208°M 1.4$
DEPTH IN FEET
100$
To Cursor
BRG
RNG
218°M 415.2$
BEACON INITIALIZE CHART
02/24/97
10:09:14 U
ACQUIRING
HDOP: 1.Ø SOG: Ø.ØKts
The right side of the window shows 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 chartplotter uses the
predicted satellite positions, and the bargraphs are blank until the satellites are
located.
The GPS 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 GPS searches for other satellites and these are displayed in
turn. If the fix is from another source (e.g. Loran) the display ahows “Good Fix”
but satellite positions may not be shown.
If a position fix has not been established, a “Fix Alarm” message is displayed.
You can clear the alarm by pressing any key. The unit will beep every few
seconds to indicate there is no position fix, until the position has been
established.
The soft keys INITIALIZE and BEACON can be used to initialize the GPS and to
manually set up a differential beacon. These functions are described in
Chapter 6.
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