Side Imaging® Sonar - Humminbird 398ci SI Combo Operation Manual

Side Imaging® Sonar
86° 86°
Your Fishfinder uses Side Imaging®
455kHz 455kHz
sonar to provide a wide yet precise
survey of a large area of water,
20°
including detailed bottom
200kHz
topography and fish-attracting
60°
83kHz
structure orientation. The Side
180 Degree Total Coverage
Imaging® transducer returns are
processed into an image similar to
an aerial photograph.
Typically, the Side Imaging® sonar
can search an area that is 240 feet
wide to each side, 480 feet total
coverage, with a depth limitation
of 150 feet. See What's on
the Side Imaging® Display and
Understanding the Side Imaging®
Display 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.
Depth capability is affected by such
factors as boat speed, wave action,
bottom hardness, water conditions,
and transducer installation.
How Sonar Works 4