Lowrance StructureMap HDS Gen 2 User manual

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StructureMap™
HDS Gen 2 Addendum
StructureMap is a tool that allows you to overlay SideScan sonar returns on
top of the chart, giving you a birds-eye view of underwater structure below
and beside your boat. StructureMap makes it easier for you to visualize the
underwater environment in relation to your position and aids the user in
interpreting sidescan sonar images.
Refer 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 Structure Source setting determines whether the StructureMap
information you want to view is live or previously recorded.
SideScan
StructureMap
Same structure shown in each panel

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Selecting Structure Source
StructureMap can be used in Live mode or
Saved mode. Live mode allows you to view
real-time StructureMap data on the screen.
Saved mode is used to display 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

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the history length that will show up behind the vessel icon. Typically it will
display the last 4-5 minutes of recording. Live mode allows the user to quick-
ly identify interesting areas of the lake and how they relate to vessel position.
It also allows the user to scroll back and zoom in on a recently scanned areas
of the lake to look at additional details of what was scanned. Live mode does
not save any data. If the unit is turned o, all recent sonar history is lost. You
must have Structurescan installed on your boat to use Live mode.
Saved mode
Displays StructureMap (.smf) les that have been created from structure
sonar log (.sl2) les. Saved mode is used to view a map of the underwater
environment that can be reviewed and examined either on or o 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 locating specic points
of interest.
NOTE: If there is more than one StructureMap of the same area on
the same SD card, the maps will overlap on your screen. If you want
to have more than one map of the same area, you should put the
maps on separate SD cards.
Navigating a StructureMap in saved mode

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Accessing StructureMap les on SD card
All StructureMap les 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 les
To create a StructureMap le you must convert a structure sonar log (.sl2)
le 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)
les automatically converted to StructureMap le format (.smf), turn on
Convert to map when complete on the Sonar Log menu. The (.sl2) le will be
converted to a (.smf) le 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
les to structure-
map format
Automatic conversion
NOTE: Keep the size of your sonar logs to 100MB or less to allow
for faster le conversion. Current le size is occasionally ashed on
the screen during the recording process. You will not be able to use
any of the unit’s other functions while a le is being converted.

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Sharing les
After structure sonar log (.sl2) les are converted to StructureMap (.smf)
les, 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 o 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 signicantly 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.

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Copying StructureMap (.smf) les from SD to internal memory
Refer to your operation manual for more information about copying les.
Access les Copy StructureMap
(.smf ) le from card
Place le into sonar logs
Using StructureMaps with mapping cards
StructureMap allows you to maintain full chart capability and can be used
with embedded cartography as well as Navionics, Insight and other third-
party charting cards compatible with HDS units. To view StructureMap data
with other mapping card data on an HDS-8 or HDS-10, place the mapping
card in one card slot and the SD card with the StructureMap le in the other
slot.
If you have an HDS-5 or HDS-7, copy the StructureMap (.smf ) les to the
units internal memory to view StructureMap data with data from another
mapping card. We recommend only adding StructureMap (.smf) les of one
lake at a time to the internal memory due to limited space. You should keep
copies of StructureMap (.smf ) les on an external SD card.
Show StructureMap (.smf) les
You can view StructureMap (.smf) les from the Files menu, which allows you
to quickly see what area each StructureMap le covers.
Viewing StructureMap (.smf) les
Select StructureMap
(.smf) le
Select Show StructureMap appears
on the screen

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Accessing Structure Options
Structure options:
• Range — Adjusts the width of the sidescan history trail. The greater
the range setting, the wider the StructureMap history trail; Lower
range settings reduce the width of the history trail.
• Transparency — Increases/decreases the visibility of Structure
overlay on top of the map. This is helpful when using marine map-
ping cards.
•
As you increase Structure overlay Transparency, you will be able to
see more marine card map data through the Structure 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 oers the best resolution, while 455 kHz has greater depth
coverage.
• Noise Rejection — Monitors the eects noise (boat pumps, water
conditions, engine ignition systems, etc.) has on your display, and
then lters out undesired signals.
• Source — Selects StructureMap Source, Live mode or Saved mode
Minimum Transparency Maximum Transparency

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*988-10175-001* © Copyright 2011
All Rights Reserved
Navico Holding AS
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