Structurescan; The Structurescan Image - Lowrance HDS Gen3 Operator's Manual

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StructureScan

StructureScan HD uses high frequencies to provide a high
resolution, picture-like image of the seabed.
Note:
Ú You must have a StructureScan HD transducer
installed to use StructureScan features.
StructureScan HD provides a 328 m (600 ft) wide coverage in high
detail with SideScan, while DownScan provides detailed images of
structure and fish directly below your boat, down to 92 m (300 ft).
The StructureScan page is accessed from the Home page when the
StructureScan transducer is connected.

The StructureScan image

The view
The StructureScan panel can be set up as a DownScan image, or
showing left/right side scanning.
The DownScan image can also be added as an overlay to the
traditional Sonar image.
StructureScan | HDS Gen3 Operator Manual