Humminbird LCR120 manual Using the LCR, Using the Built-In Simulator

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sensitivity level for conditions. Momentarily, you’ll see the reading start to “March” across the screen from right to left.

Increase your boat speed to ensure that you get a continuous bottom reading as the boat moves. Your LCR 120 and its sensor are designed to operate at up to 75 mph, so feel free to test them at very high speeds.

If the LCR 120 performs well at idle or slow speeds, but the display is not continuous at higher speeds, the sensor is not installed properly. Air bubbles or turbulence from the boat hull are passing across the sensor face, blocking the transmitting signal. By following the instructions in “Mounting the Sensor,” you can make simple adjustments that should fix the problem.

NOTE: If other problems occur, see “Troubleshooting” later in this manual for tips from the Hummingbird engineers. If you don’t find the solution there, call out Customer Service Hotline.

Section 4: Using the LCR 120

This section provides complete information on operating the LCR 120 through its front panel controls. You are encouraged to read this information completely as you first learn to use the LCR 120; doing so will insure you make the most if its many features and functions.

The fist part of this section explains the use of the built-in simulator, which you can use to practice selecting functions through the front panel. The remaining instructions, which can be followed while using the simulator or in actual operation, explain each function and are organized according to the front panel layout.

Using the Built-In Simulator

The LCR 120 includes a built-in simulator that helps you learn to use your new equipment. The simulator displays a typical underwater scene, and lets you practice with the controls.