For Best Performance
Use the following tips and examples to help you interpret the Side Imaging® display.
Boat speed:
Side Imaging® is best performed at boat speeds between 2 to 6 mph. If the boat is
stationary, the same information is displayed over and over. If the boat is moving very quickly,
there will be gaps between the strips of information. The best boat speed to use will depend on
the side range selected. Slower speeds are good for longer ranges, while faster speeds can be
used at shorter ranges.
Boat navigation:
It is important to understand that when the boat turns, successive beam strips
to one side will begin to overlap and the strips on the other side will fan out, providing some
distortion to the image. Because of this, the best imaging performance is produced by straight
line navigation and minimal side-to-side boat motion (i.e. wave induced, etc.). This applies to
navigation by either the main engine or the trolling motor. Minimize turning time and avoid
wave action that induces large side-to-side rocking of the boat. For example, if there is a lot of
wave activity, try to move the boat so that it is perpendicular to the waves instead of parallel
with the waves in order to minimize the side-to-side rocking of the boat.
Beam Coverage:
When there is an area directly under the boat that does not have SI beam
coverage, this area will be covered by the standard 200/83 kHz down-looking beam and
displayed in the Sonar views. The net effect of this, on the display, is that a single object may
appear as two separate entities, when in reality, it is one continuous object. See
Submerged
Bridge: A Closer Perspective
and the
Submerged Bridge: Alternative Perspective
illustrations for examples of this.
See
humminbird.com
and
sideimaging.com
for a side imaging sonar tutorial and
additional information.
Side Imaging® Tips
Boat speed: 2 to 6 mph
Straight line navigation
Minimum turning time and wave turbulence
What’s on the Side Imaging
®
Display
70
Summary of Contents for 1158? combo
Page 1: ...Installation and Operations Manual 1158c Combo 1198c SI Combo Product Manual...
Page 73: ...61 to your boat including the following items What s on the Sonar Display 7 10 3 4 5 6 11...
Page 146: ...Sonar Tab Normal Mode Sonar Tab Advanced Mode Menu Quick Tips 134...