For Best Performance - Humminbird 1158c Combo Installation And Operation Manual
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- Operation manual (203 pages)
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For Best Performance
Use the following tips and examples to help you interpret the Side Imaging® display.
Side Imaging® Tips
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.
What's on the Side Imaging® Display
Boat speed: 2 to 6 mph
Straight line navigation
Minimum turning time and wave turbulence
70
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- Installation Overview
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Questions and answers
How to record sonar readings onto an SD card?
To record sonar readings on an SD card using the Humminbird 1158c Combo, follow these steps:
1. Install an SD Memory Card: Ensure that an optional-purchase SD memory card is installed in the slot of the device.
2. Access the Main Menu: Press the MENU key twice to open the Main Menu.
3. Navigate to the Navigation Tab: Use the RIGHT Cursor key to select the Navigation tab.
4. Export Navigation Data: Highlight "Export All Nav Data" and press the RIGHT Cursor key. A confirmation dialog box will appear.
5. Confirm Export: Press the RIGHT Cursor key again to confirm the export. If you want to cancel the export, press the LEFT Cursor key.
Note: If no SD memory card is installed, an error message will be displayed. Insert the SD memory card and try again.
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