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Page 14 491 Echo Sounder Operations Manual
Using demo mode
The echo sounder can be operated in “demo mode” for
training and familiarization. Simulated echo data generated by
the 491 will be displayed.
To enter demo mode:
1. Press STAR several times to display the ECHO SOUNDER
SETUP screen.
2. Press the CURSOR PAD down to select demo mode, then
press EDIT.
3. Press the CURSOR PAD left or right to highlight “ON,”
then press ACCEPT.
While in demo mode, the word “Demo” appears in the
upper right corner of the ECHO screen.
To leave demo mode, repeat this procedure, selecting “OFF”
instead of “ON.”
Displaying echo
sounder data on the
CHART screen
You can overlay a smaller version of the echo screen onto the
CHART screen.
For the 961/962
To overlay the echo screen:
1. Press CHART to display the CHART screen, then press
OVERLAY.
2. At the CHART OVERLAY SELECTION window, press
SHOW 490.
Both chart views A and B will display live echo sounder
data on the right-hand side of the screen.
3. To remove echo sounder data, press HIDE 490 on the
CHART OVERLAY screen.
For the 957/958
To overlay the echo screen:
1. Press CHART to display the CHART screen, then press
SOUNDER. The CHART screen will display live echo
sounder data on the right-hand side of the screen.