Humminbird LCR 100 Operation Manual page 5

1. Selecting Sensitivity/Units;
Factory setting: +0/FEET
The Sensitivity/Units function has two uses: It lets you
adjust LCR 100 sensitivity and control whether depth
measurement is in feet or meters.
The LCR 100 automatically increases or decreases its
sensitivity setting when water conditions change (as when
the bottom is stirred up). If you want to manually adjust
Sensitivity, select SENS and press the Up or Down arrow
button to adjust the automatic setting within a "+5" to "-5"
range. For example, if you set it at "+2," Sensitivity remains
2 settings higher than the normal automatic setting.
Pressing the ON-OFF button when the SENS menu is
displayed switches the unit of depth measurement between
feet and meters.
2. Enabling Bottom Alarm;
Factory .setting: OFF
The Bottom Alarm lets you specify the minimum
depth you want to maintain. To use it, select B ALM;
then, press the ON-OFF button to activate the alarm,
and the Up or Down arrow key to adjust the depth at
which the alarm will sound. An alarm symbol is
displayed when this function is on.
When Bottom Alarm is on, you'll hear a continuous
chirping sound when the bottom is shallower than you
defined. This is very handy for alerting you to shallow
water or helping you to maintain position over
structure.