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 sensitivity, 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 is 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.
