Operation Manual

Parameters
115
850-164385 / Rev.C
Noise Level
The Noise Level button is located in the Horizontal menu.
The Noise level button provides a readout of the current noise in
the waters surrounding the vessel. It is only used for test purposes.
This noise is caused by water flow, mechnical disturbances from
hull and engine, and even from other electric or electronic systems
on the vessel. In order to obtain the best possible sonar result, the
noise level readout must be as low as possible, and you should read
a value close to 47 dB.