Humminbird 120 User Guide

as the depth changes.  In this “Auto Depth Range” mode, the bottom is 
blacked-in for easy-to-understand readings. 
 

If you prefer, you can turn Auto Depth Range off.  Select DEPTH 

RANGE, press ON-OFF, and adjust the Depth Range with the Up or Down 
arrow button. 
 

In this “Manual Depth Range” mode, the bottom is not blacked in.  

This lets you see a “second return,” which is preferred by some fisherman 
because the width of the second echo can indicate bottom hardness. 

 
Trip Log 
 

 
Although speed and temperature accessories are not available for the 
LCR 120, the Trip Log provides a useful timer.  The timer begins when the 
unit is powered and can be reset and any time by pressing STOP.  
Pressing ON-OFF exits Trip Log and returns you to normal LCR 120 
operations.