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Accessing StructureMap files on SD card 

All StructureMap files on your SD card or in the unit’s internal memory will 

automatically appear on the screen when Saved mode is selected. 

Recording Structure data

To record structure data, steer your boat 

over an area and select 

Log Sonar data 

from 

the Structure Options menu. Refer to your 

operation manual for more information about 

sonar log options.

Converting files

To create a StructureMap file you must convert a structure sonar log (.sl2) 

file to StructureMap format (.smf). This can be done automatically from 

the Sonar Log menu, or manually by converting logs from 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 Auto Range 

when recording a structure sonar log (.sl2). 

Manual conversion

Converts sonar log 

files to structure

-

map format

Automatic conversion

NOTE

Keep the size of your sonar logs to 100MB or less to allow 

for faster file conversion. Current file size is occasionally flashed on 

the screen during the recording process. You will not be able to use 

any of the unit’s other functions while a file is being converted. 

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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