Operation Manual

Operational procedures

850-165186 / Rev.B

How to zoom in on bottom echoes

The Bottom Lock 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 Lock

1 Make sure that your echo sounder presentation is in an

active window.

2 Press the B-LCK button.

If you were operating the echo sounder in Phased range mode

when you pressed the B-LCK button, the echo sounder will

automatically switch to St andard mode and use the applicable

depth range.

Change the range in the expansion window

1 Press the ADJ button to open the Echo presentation

setup.

2 Change the Expansion window value.

3 Press the ENT button to save the choice and exit.

De-activate Bottom Lock

1 Press the STND buttontoreturntoStandard mode, or

2 Press the SHIFT buttontoreturntoPhased range mode.