Humminbird Fish Finder 409010-1 User Manual

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What’s on the Side Imaging® Display
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.
On the Water Interpretation
New bridge pilings
1
Creek channel
2
Submerged bridge
3
Submerged Bridge, Creek Channel, and New Bridge Piling
1
2
3
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

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