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The thrill of any fishing adventure
begins with finding the right place to wet your line. Fishfinder 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 moore of
How Fish Finders Work, or select Fish
Finder that right for you, please visit our site at: http://www.bystore.org
Almost anyone can now afford to own a unit that will assist in a better
fishing.
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