Humminbird TCR ID-1 Operation Manual page 22

USING THE TCR ID-1
OPERATING THE TCR ID-1
Example 2: Often-used function.
If you think you'll be using zoom often, you can go to the zoom function, let the
instructions disappear, and then activate the zoom when you need it simply by pressing
On/Off.
The following describes the functions and how to use them,
in order of appearance after you turn the unit on.
1. Sensitivity
Automatic setting: on, "0" or normal
As conditions change, the computer will automatically in-
crease or decrease the sensitivity setting. You can manually
increase or decrease the automatic setting from a range of
"+5" to "-5." This level will maintain itself as long as you
have the unit on, automatically, as a result of the TCR's
Sensitivity Bias feature. For example, if you set the
sensitivity at "+2," the sensitivity will remain 2 settings
higher than the normal automatic settings until you turn the
TCR off.
2. Bottom Alarm
Automatic setting: off
Use the On/Off button to activate the alarm, and the alarm
cursor appears on the screen. Then use the arrow keys to
adjust the depth at which the alarm will sound. You'll hear a
continuous chirping sound when the bottom is within the
area that you've defined with the alarm cursor. This is a
great feature to use to alert you to shallow
water, or to maintain your position over structure.
3. Fish Alarm
Automatic setting: off
The fish alarm is easily activated by pressing the On/Off button. This 2-level alarm can
be set to sound for all fish, or to ignore weaker signals and alarm only for stronger
signals, such as those from larger fish. You can also adjust the volume of the fish alarm.
The controls for this function are a little different. Pressing the Up arrow lets you switch
between alarms for all fish and large fish. The Down arrow controls volume of the alarm.