Simrad EY500, Instruction Manual

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Simrad EY 500
P3402/C
51
2.8 THE LAYER MENU
Layer Menu
Super Layer
Layer-1 Menu
Layer-2 Menu
Layer-3 Menu
Layer-4 Menu
Layer-6 Menu
Layer-7 Menu
Layer-8 Menu
Layer-9 Menu
Layer-10 Menu
Much of the processing of the EY 500 is related to layers in the water volume.
The layers are either referred to the sea surface or referred to the detected
bottom, and only pings with a successful bottom detection are processed, except
if the layer type is pelagic. For measurements in deep waters, or horizontal
pinging, a pelagic layer type is provided, which is referred to the transducer face
with processing of all pings whether bottom detection is successful or not. A
maximum of ten layers can be defined, and overlapping layers are allowed.
The EY 500 performs independent echo integration and size distribution
processing (applies to split-beam transceiver only) within each layer. Size
distribution and echo integration tables may be printed by the printer and
stored on hard disk. However, for one of the layers, the super layer, also a
graphical presentation on the display is available; a bar chart showing the size
distribution and an inclined line showing the buildup of the integrator. The
super layer status can be attached to any of the ten layers, but only to one at a
time. The output of sample data and scope plots is also controlled by the super
layer settings. Only sample data inside the super layer is output in sample
mode, and the start of a scope plot coincides with the start of the super layer.
The computation of statistical parameters (size distribution and echo
integration) is based on averaging along the path travelled by the vessel. The
averaging interval is often referred to as the log interval. The start and the stop
of the averaging interval are common to all layers. The averaging interval is set
from the Log Menu.