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FUNdamentals
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Fish Finding
What is a Sonar Fish Finder
People
have been fishing for thousands of years. Every person fishing has
had the same problem of finding fish and getting them to bite. There are six facets to a good sonar unit:
Transducer
The
transducer transmits the sound waves (Sonar) in order to illustrate
what is below the surface of the water. The most important
consideration when choosing a transducer is "cone angle",
or how wide a beam the transducer transmits. The wider the degree on
the cone, the bigger your view of what lies beneath. As you move
deeper, the cone angle widens but sensitivity starts to diminish.
Transducers come in cone angles from 9 degrees to 60 degrees however
most units are between 16-20 degrees. A cone of 20 degrees is the
ideal angle for fishermen fishing in a variety of water depths. When
choosing a transducer you must also consider Frequency. Most come
with 50, 83, 192 or 200 kHz. The higher frequencies (192 and 200 kHz)
work well in shallow water, and low frequency work well in deep
water. One more thing to consider - single beam versus dual beam. The
standard transducer has a single beam as you move up the performance
(and price) scale you can add beams (dual beam, triple beam, side
beam, etc.) which will allow you to cover more water.
Fishfinders
and GPS units come in many different display resolutions. The higher
the resolution the better the image will be. Color screens are better
especially for direct sunlight because you can see them better. New
to the market are High Definition screens; just like your television
at home, they provide a superior image and are definitely worth the
investment if you can afford it. Black and white screens are still
available and still useful if budget is a constraint. A black and
white screen fishfinder is better than no fishfinder!
A general
rule of thumb - the more power, the better your fishfinder will
perform. The power of a unit is measured in Watts - the higher the
wattage, the more efficient your unit will be (meaning faster
readouts). The shallower the water you fish, the less power you will
need. For those who fish deep water (Great Lakes or saltwater), it is
recommended that you choose the most powerful unit you can afford.
Fishfinders
can either be attached permanently to your boat or can be taken in
and out of your boat with ease. For those that rent boats, a portable
fishfinder is the perfect solution. They are compact in size and come
with a carrying case and most importantly, they perform as
proficiently as a fixed unit. Fixed fishfinders are obviously best
for boat owners. They can be mounted exactly where you want, the
wires can be stored under the bow or floor boards and out of
"harms way", and the transducer can be securely attached to
either the stern, trolling motor or hull. Portable units use a
suction cup for tranducer mounting.
Displays
range in size from four inches to seven inches and larger. As with
all your marine electronics, get the biggest screen size you can afford.
This is a
critically important characteristic that is often overlooked when
purchasing a fishfinder. Consumers are so focused on price and
ensuring their fishfinder has all the features they want (whether
they need them or not), that they often fail to consider if the
product is easy to use. An excellent finder that is too complex or
cumbersome often will go unused and you may find that you don't have
the time to figure out all the features that you may have paid
top-dollar for.
Shop
Fish Finding Sonars
If
you have
any hints, suggestions, techniques or anything that you would like to share
or
have me put onto this web page,
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