Simrad GO XSE Series Operator's Manual page 171

Frequencies
Two frequencies are supported. 800 kHz provides the sharpest
image without sacrificing range. While 455 kHz can be used in
deeper waters, or for expanded range capabilities.
Clear live history
Clears existing live history data from the screen and begins showing
only the most current data.
Log sonar data
Displays the log sonar dialog. Refer to "Recording log data" on page 149.
Source
Selects StructureMap source.
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StructureMap | GO XSE/XSR Operator Manual