Fishnder 340C Owner’s Manual 3
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Using Dual Beam
Dual beam works best for shallow water (for example, inland)
applications. A dual beam transducer can transmit a narrow or a
wide beam. The water area covered by the transmitted sound waves
is determined by the beam width of the transducer and the water
depth. The narrow beam provides crisp detail of what is under your
boat, and is very helpful if you are shing in deeper water where
the beam covers more area (for example, at a depth of 30 feet, the
narrow beam covers the area of about a 7-foot circle).
Wide
Beam
Narrow
Beam
The wide beam is more helpful in shallow water, because it gives
you a much wider view of objects in the water, including areas
beyond the sides of your boat. At a depth of 30 feet, the wide beam
covers the area of approximately a 20-foot circle.
Understanding the Fishnder Screen
Experimentation and experience are the keys to successfully
interpreting your Fishnder screen. We recommend that you take
your Fishnder out on familiar water, and spend time learning to
interpret what you see on the Fishnder 340C screen.
Think of the Fishnder screen as if you took a picture from the
side of an aquarium in your home. You can see how deep a sh is
in the water (how close it is to the top or bottom), but you cannot
tell where the sh is located horizontally in the water (whether it is
near the front or the back of the aquarium). Remember this when
you are trying to locate exactly where something is in the water.
