Increase your boat speed to ensure that you get a continuous bottom reading as the boat moves.
Your transducer is designed to operate at up to 75 mph, so feel free to test them at high speeds.
If the Dimension 3 performs well at idle or slow speeds, but the display is not continuous at higher
speeds, the transducer is not installed properly. Air bubbles or turbulence from the boat hull are passing
across the transducer face, blocking the transmitted s ignal. By following the instructions in "Mounting the
Transducer," 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
Humminbird engineers. If you don't find the solution there, call our toll-free Customer Service Hotline.
BASIC OPERATIONS
This section explains how to run the Dimension 3 simulator for practice and how to start the
Dimension 3 for actual use. You're also shown how to use the "screen control" buttons-the buttons that let
you control the display of underwater images on the Dimension 3 screen.
You should read this section and Section S, "Selecting Dimension 3 Functions," as you first learn
to use the Dimension 3. Doing so will ensure you make the most of its many features.
The first part of this section explains the built-in simulator. The remaining instructions can be
followed while using the simulator or in actual operation.
USING THE BUILT-IN SIMULATOR
The Dimension 3 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 h old the
POWER button until a chirping sound begins. Release the button, and the built -in simulator begins
displaying a typical Dimension 3 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 Dimension 3 expert.
