High Definition Side Imaging® Sonar (Side Imaging® Models Only [899Ci Hd Si And 999Ci Hd Si]); Xtreme Depth Sonar ( Xtreme Depth Series™ Models Only [ 859Ci Hd Xd And 959Ci Hd Xd]) - Humminbird 800 series Operation Manual

86° 86°
455kHz 455kHz
20°
200kHz
60°
83kHz
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® views on the
screen, with the same depth limitation of 100 feet. See What's on the
Down Imaging® Display for more information.
Introduction
High Definition
Side Imaging® Sonar
(Side Imaging® models only
[899ci HD SI and 999ci HD SI only])
The 899ci HD SI/999ci HD SI Combo
Fishing System 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
processed into an image similar to an
aerial photograph.
are
Depth capability is affected by such factors as boat speed, wave action,
bottom hardness, water conditions, and transducer installation.
4
Xtreme Depth Sonar
(Xtreme Depth Series™ models only [859ci HD
XD and 959ci HD XD])
The 859ci HD XD/959ci HD XD Combo
Fishing System uses the XD transducer to
provide extreme depth coverage with
DualBeam PLUS™ technology.
The Xtreme Depth sonar beams can be
operated at two frequencies: 50 kHz (74°)
and 200 kHz (20°). The wide, 50 kHz beam
transmits at a low frequency to provide
greater depth coverage, up to 2500 ft (762
m). The narrow, 200 kHz center beam
transmits at a high frequency to provide
maximum detail at shallower depths.
The DualBeam PLUS™ technology allows
you to view the sonar returns blended
together, separately, or side-by-side (see
Sonar Menu Tab: Beam Select and Views
for more information).