Introduction
3
High Definition
Side Imaging® Sonar
(898c SI and 998c SI only)
The 898c SI Combo and 998c SI Combo use
Side Imaging® sonar to provide a wide yet
precise survey of a large area of water,
including detailed bottom topography and
fish-attracting structure orientation. The
Side Imaging® transducer returns are
processed into an image similar to an aerial
photograph.
Typically, the Side Imaging® sonar can
search an area that is 480 feet wide (240 to
each side), with a typical depth
performance of 150 feet when the Side
Imaging® Sonar frequency is set for
455 kHz. The side beams can be operated at
one of two frequencies: 455 kHz or 800 kHz.
Selecting 800 kHz produces the sharpest
image, but the search area to each side
and the depth capability are limited as
compared to the 455 kHz frequency. See
What’s on the Side Imaging® Display and
Understanding Side Imaging® for more
information.
The Side Imaging® transducer also
provides down imaging displays on the
screen. See What's on the Down
Imaging™ Display for more information.
DualBeam PLUS™ Sonar
(858c, 898c SI, 958c, 998c SI)
The Fishing System uses a 200/83 kHz
DualBeam PLUS™ sonar system with a wide
(60°) area of coverage. DualBeam PLUS™
sonar has a narrowly focused 20° center
beam, surrounded by a second beam of 60°,
expanding your coverage to an area equal to
your depth. In 20 feet of water, the wider
beam covers an area 20 feet wide.
DualBeam PLUS™ sonar returns can be
blended together, viewed separately, or
compared side-by-side. DualBeam PLUS™ is
ideal for a wide range of conditions - from
shallow to very deep water in both fresh and
salt water. Depth capability is affected by
such factors as boat speed, wave action,
bottom hardness, water conditions, and
transducer installation.
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