Humminbird 1158? combo, Product Manual

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The main benefit of Side Imaging® sonar to anglers is that it provides an overall survey of a large
area of water. This gives you a better understanding of the bottom topography and how
structure is oriented for more efficient fishing.
Saltwater anglers pick up precise details of popular fishing structure like wrecks, reefs, humps
and drop-offs, as well as being able to spot bait balls in open water. Freshwater anglers can
see fish-attracting structure such as timber, stumps, rocks, and creek beds.
Side Imaging® Frequencies and Coverage
Side Imaging® sonar uses two very precise sonar beams that are directed to either side of the
boat. The beams “illuminate” the bottom contour, structure, and fish, and the results are
displayed in a “picture-like” image on the screen.
• Frequencies: The side beams can be operated at one of two frequencies: 455 kHz or 800
kHz. Your Side Imaging® transducer also provides DualBeam PLUS™ at 200/83 kHz.
Selecting 800 kHz produces the sharpest image, while selecting 455 kHz provides
greater bottom coverage area.
• Side Imaging® Beams are extremely narrow from front to back, and provide “thin slices”
of the bottom for high resolution imaging.
• Side Imaging® Range: 240 feet to each side, with a total side coverage of 480 feet, with
a depth limitation of 150 feet, depending on the contour of the bottom and when the
side beam frequency selection is set to 455 kHz.
130° Total Coverage
60°
83kHz
20°
200kHz
55°
800kHz
55°
800kHz
Side Imaging
800 kHz provides highest resolution with 130° total beam width
455 kHz provides maximum coverage with 180° total beam width
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What’s on the Side Imaging ® Display