Simrad GO XSE Operator's Manual page 131

Range Lines
Range lines can be added to the image to make it easier to estimate
depth (Downscan) and distance (SideScan).
Recording StructureScan data
You can record StructureScan data and save the file internally in the
GO XSE unit, or onto memory card as described in "Start Recording
echosounder data" on page 119.
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StructureScan | GO XSE Operator Manual