Simrad PI32
74
857-164636 / Rev.A
How to zoom in on bottom echoes
The
Bottom Expansion
functions allows you to zoom in on the
echoes closest to the bottom.
When this function is active, the echo sounder presentation is
split in two. The upper part is the ordinary presentation, while
the lower part shows the echoes just above the bottom. The
bottom appears to be flat, but this may not be the case, as the
zoomed area is related to the bottom.
Activate Bottom Expansion
1
Make sure that your echo sounder presentation is active.
2
Press the
MENU
button to open the main menu.
3
Open the
Echo
menu.
4
Select
Bottom expansion
.
If your current window was not an echo sounder, you have now
closed it, and replaced it with an echo sounder with bottom
expansion. If you also have a second page with an echo sounder
enabled, you need to enable the expansion mode for the second
page separately.
Change the range in the expansion window
1
Press the
ENT
button to open the
Presentation setup
.
2
Locate the
Expansion window
setting, and change to a
new value.
3
Press the
ENT
button save the setting and return to the
echo sounder view.
De-activate BottomExpansion
1
Press the
MENU
button to open the main menu.
2
Open the
Echo
menu.
3
Select
Echo display
.
Related topics
→
Echo presentation setup, page 154