Pennsylvania Angler & Boater - January/February 2021 - 42
Look Before
You Cast
by Jeff Knapp
photos by the author
Despite anglers' chronic search for that special lure, magic color,
or hot lake, the most efficient way to catch fish is to be sure
you are actually fishing around fish. Thanks to the quality of
modern sonar units, this vital element of the fishing puzzle is
easier to accomplish.
Equipped with three transducer options-seasoned
with plenty of on-the-water experience needed to interpret
produced images-it makes sense to take a good look at what
is below you before you drop a lure into the water. These
options are traditional 2D sonar, down imaging sonar, and side
imaging sonar.
broader as the water deepens. Transducer frequencies in the
200 kHz range are most appropriate for the depths commonly
encountered in Pennsylvania. Duel frequency transducers can
also produce a lower frequency pulse-for instance 50 kHz or
77 kHz-which performs better in deeper water and produces
a wider beam. Sonar units with the option of a split frequency
screen allows a comparison of the two views.
The newest 2D sonar option to hit the market is Compressed
High-Intensity Radiated Pulse (CHIRP) technology, with
which the transducer beam scrolls through a defined frequency
range. This provides better target separation such as fish
holding tight to the bottom or separated images of individual
fish in close proximity.
Traditional 2D sonar
Down imaging sonar
Traditional 2D sonar is the standard view anglers have
become accustomed to for years. Transducers with 2D sonar
produce a conical beam similar to that of a flashlight, becoming
42
Pennsylvania Angler & Boater * January/February 2021
The names of down imaging sonar (ClearVu, DownScan)
vary depending upon the maker, but all share sonar beam
characteristics that one manufacturer compares to that of
www.fishandboat.com
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Pennsylvania Angler & Boater - January/February 2021
Table of Contents for the Digital Edition of Pennsylvania Angler & Boater - January/February 2021
Contents
Pennsylvania Angler & Boater - January/February 2021 - Cover1
Pennsylvania Angler & Boater - January/February 2021 - Cover2
Pennsylvania Angler & Boater - January/February 2021 - Contents
Pennsylvania Angler & Boater - January/February 2021 - 4
Pennsylvania Angler & Boater - January/February 2021 - 5
Pennsylvania Angler & Boater - January/February 2021 - 6
Pennsylvania Angler & Boater - January/February 2021 - 7
Pennsylvania Angler & Boater - January/February 2021 - 8
Pennsylvania Angler & Boater - January/February 2021 - 9
Pennsylvania Angler & Boater - January/February 2021 - 10
Pennsylvania Angler & Boater - January/February 2021 - 11
Pennsylvania Angler & Boater - January/February 2021 - 12
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Pennsylvania Angler & Boater - January/February 2021 - 42
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Pennsylvania Angler & Boater - January/February 2021 - Cover3
Pennsylvania Angler & Boater - January/February 2021 - Cover4
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