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Sharing files

After structure sonar log (.sl2) files are converted to StructureMap (.smf) 

files, they can be saved to a SD card and used on other GPS capable HDS 

Gen 2 units without the need for the LSS-1 StructureScan module. 

Scanning Fishing areas

With the Structure Source set to the default Live mode, steer the boat over 

the desired location to scan the area. When conducting a side-by-side scan 

of an area, you will get a cleaner scan if you do not overlap history trails and 

you turn off auto ranging on the sidescan.

Scanning tips

• 

 To get a picture of taller structure (a wreck, etc) — don’t drive over 

it. Steer the boat so the structure will be on the left or right side 

of your boat.

•   Set your structure range to a significantly greater level (two-to-

three times) than the water depth to ensure a complete scan and 

to maximize conversion accuracy.

Side-by-side scan 

NOTE

Optimal speed for viewing or logging StructureMap data 

is between 2-8 mph (3-12 kmh). Live mode is disabled for speeds 

greater than 10 mph.

Summary of Contents for StructureMap HDS Gen 2

Page 1: ... to your HDS manual for basic information about HDS unit operation Refer to your StructureScan manual for more information about StructureScan Viewing StructureMap data You can view StructureMap data by turning on Structure overlay from the Chart menu or by using the Overlay softkey HDS 8 10 StructureMap data will start to appear on the Chart screen as soon as Structure overlay is en abled The Str...

Page 2: ... StructureMap data previously saved to a SD card or the unit s internal memory Live mode Displays the last few minutes of the Side Imaging history as a trail behind the vessel icon The length of this trail will vary depending on the Side Imaging and Down Imaging range settings The higher the range settings the longer Vessel icon History trail Structure Turning on Structure overlay ...

Page 3: ...escan installed on your boat to use Live mode Saved mode Displays StructureMap smf files that have been created from structure sonar log sl2 files Saved mode is used to view a map of the underwater environment that can be reviewed and examined either on or off of the water It can be used when revisiting an area that has already been scanned in order to assist the user in positioning the vessel or ...

Page 4: ...om the Files menu We recommend using an SD card for recording when possible due to the limited size of the HDS internal memory To have structure sonar log sl2 files automatically converted to StructureMap file format smf turn on Convert to map when complete on the Sonar Log menu The sl2 file will be converted to a smf file when recording is stopped NOTE For best results we recommend turning off Au...

Page 5: ...n area you will get a cleaner scan if you do not overlap history trails and you turn off auto ranging on the sidescan Scanning tips To get a picture of taller structure a wreck etc don t drive over it Steer the boat so the structure will be on the left or right side of your boat Set your structure range to a significantly greater level two to three times than the water depth to ensure a complete s...

Page 6: ... HDS 10 place the mapping card in one card slot and the SD card with the StructureMap file in the other slot If you have an HDS 5 or HDS 7 copy the StructureMap smf files to the units internal memory to view StructureMap data with data from another mapping card We recommend only adding StructureMap smf files of one lake at a time to the internal memory due to limited space You should keep copies o...

Page 7: ...cture overlay Palette Used to select a color scheme that allows the Structure map detail to appear more clearly on the underlying chart Contrast Adjusts the brightness ratio between light and dark areas on the screen making it easier to distinguish suspended objects from the background Frequency Controls the transducer frequency used by the unit 800 kHz offers the best resolution while 455 kHz has...

Page 8: ...8 988 10175 001 Copyright 2011 All Rights Reserved Navico Holding AS Visit our website www lowrance com ...

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