How Fish Finders Work
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Fish Finders
By: Andrei Loskoutov
The thrill of any fishing adventure begins with finding the right place
to wet your line. Fishfinders allow anglers to quickly identify key targets
and structure, as well as fish. A Fish Finder is a subset of a group of
instruments called sonars. A Sonar consists of a transmitter, transducer,
receiver and display.
In the simplest terms, an electrical impulse from a transmitter is
converted into a sound wave by the transducer and sent into the water. When
this wave strikes an object, it rebounds. This echo strikes the transducer,
which converts it back into an electric signal, which is amplified by the
receiver and sent to the display. Since the speed of sound in water is
constant (approximately 4800 feet per second), the time lapse between the
transmitted signal and the received echo can be measured and the distance to
the object determined. This process repeats itself many times per second.
Display:
The display shows a history of the received echoes. The user can make a
number of adjustments to tailor the display to his or her preference, such
as senitivity, the depth range and chart speed. Displays use a variety of
technologies, provide different resolutions and number of shades of gray or
color. Each display is made up of a number of pixels, which are little
square blocks that make up the images. The more pixels and shades of gray or
color the better resolution and image clarity.
Fish Targets:
Echoes from fish within the beam will be shown on the display by illuminated
pixels. What image appears on the display depends on a number of factors:
the sensitivity setting on the fishfinder, the cone angle of the transducer,
the speed of the boat, and the size, depth, speed and direction of the fish.
A fish that is swimming directly beneath the boat, it will create a
consistent echo that will cause a continuous line to appear on the display.
A stationary fish caught in a narrow beam transducer appears as a single
point on the screen as the boat passes above it, whereas under the same
conditions the fish appears as an arch if a wide beam transducer is used.
To read more of How Fish Finders Work, or select a Fish Finder that right
for you, please visit our site at: www.bystore.org. Almost anyone can now
afford to own a unit that will assist in a better fishing.
Author Bio
Andrei Loskoutov
www.bystore.org
