Using the Fishfinder 340C > Understanding the Main Pages

If you are using a dual frequency transducer and you set the Frequency to Dual, you can access the Split Sonar Page, the Sonar (220kHz) Page, the Sonar (50kHz) Page, and its related Adjustment Menu.

Along the right side of the screen is a scale that reflects the depth of the area shown.

The most intense solid colors indicate the strongest sonar returns (red is the default). The weakest sonar returns appear in the least intense color (blue is the default).

For more information on understanding the sonar, read the Getting Started section of this manual (see page 2).

Using Split When Zoomed

You can set your Fishfinder to split the screen every time use the Zoom option on a full-screen Sonar Page.

Split Sonar Page withAdjustment Menu

For all Sonar Pages, the currently selected adjustment option

(see page 35) appears in the upper-left corner of the screen. Directly below the adjustment option, the screen shows numeric data, such as Depth, Water Temperature, or Water Speed, depending on your settings (see page 37). The middle of the page contains a right- to-left moving sonar image of the water beneath your boat. Items appear as they pass under your transducer. Items on the right side of the screen are closer to you than those on the left.

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Fishfinder 340C Owner’s Manual