Humminbird 1158c Combo, Installation And Operation Manual

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High Definition Side Imaging ® Sonar
(1198c SI Combo models only)
Your 1198c SI Combo uses 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 the
Side Imaging® Display for more information.
DualBeam PLUS™ Sonar
(1158c, 1198c SI)
Your 1100 Series™ 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.
60°
83kHz
20°
200kHz
86°
455kHz
86°
455kHz
3
Introduction