Humminbird LCR 3D - Manual (Page 17)

USING THE BUILT-IN SIMULATOR
The LCR 3D 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.
The unit must be turned off before you start the simulator. To activate it, press down and
hold the POWER button until a chirping sound begins. Release the button, and the built-in
simulator begins displaying a typical LCR 3D reading.
You can use the simulator to learn the functions explained in the rest of this manual, just
as if you were getting actual on-the-water readings. To turn off the simulator, turn off the unit by
pressing the POWER button again.
Of course, the best way to learn is with actual use, especially in familiar waters. If you
know what's below and see it on-screen, you'll quickly become a LCR 3D expert.
The LCR 3D offers function selection with front panel
buttons. (Note that to select something with a button, you must
press it fully so that you hear a "chirp" sound.)
You can learn to use these features by actual operation, or
when using the simulator.
Press the POWER button once to turn the LCR 3D on.
Pressing it again turns the LCR 3D off. When the unit is off, keeping
POWER pressed for about 2 seconds starts the built-in simulator.
During night operation, press the LIGHT button once to turn
the back light on high, and a second time to select low intensity.
Press LIGHT again when you want to turn backlighting off.
In either actual operation or simulation, you see a 3-
dimensional, underwater image that shows the bottom, any objects
between the bottom and your boat, and the current depth.