134 E-Series Networked Display Reference Manual
To set the zoom position
1. Press the ZOOM softkey.
2. Select MAN with the ZOOM POSITION softkey.
3. Reposition the zoomed image using the rotary controller.
4. Press OK.
Bottom lock and bottom shift
The Bottom Lock function applies a filter to flatten the image of the seabed and
make any objects on or just above it easier to discern.
This feature is particularly useful for finding fish that feed close to the bottom.
Bottom Lock is selected for individual fishfinder windows and can replace or appear
alongside the standard fishfinder image.
Adjusting the range of the bottom lock image allows you to view more bottom
details. You can also reposition the image on screen to anywhere between the
bottom of the window (0%) and the middle of the window (50%) by using the
Bottom Shift control.
To adjust bottom lock
1. Toggle to FULL or SPLIT.
2. Use the appropriate softkeys and rotary controller to set the range and bottom-
shift values.
Using A-Scope to view a live image
The standard fishfinder display shows a historical record of fishfinder echoes. If
required, you can display a live image of the bottom structure and the fish directly
BL
B-LOCK RANGE
50ft
BOTTOM SHIFT
14%
BOTTOM LOCK
FULL SPLIT
F1: 200 kHz
SHALLOW
Freq1: 200 kHz-Auto
Freq2: None
SELECT OPTION
BOTTOM LOCK
ADJUST
FREQ1 FREQ2
Depth from the surface
Bottom lock range
(distance from bottom)
Bottom
shift
Depth
reading
Bottom lock image
Standard fishfinder image
D10412-1
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