Simrad PI Spread/Depth
2
Ensure that you have a graphical presentation active on your
PI system.
3
Press the
ADJ
button to open the
Graphic setup
menu.
4
Press the
GAIN+
button repeatedly to reach the
Marker line
dialogue.
5
Observe the list of sensors that appear. Only those sensors
that can provide a marker line are listed.
6
Set
Auto
to
On
.
• This allows the PI unit to use the Trawl Calculator to
estimate the correct time delay. (This is not applicable
for purse seiners.)
• If you wish to calculate the delay yourself, set
Auto
to
Off
. You must then enter the calculated value into the
Delay
column.
7
Enter requested value for
Width
.
• Use this parameter to control the thickness (in pixels)
of the marker line(s).
8
For every marker line, set
Show
to
On
.
9
If you wish to see the marker lines in the expanded views
(bottom expansion, zoom and phased range), set
Sensor
marker in expansion
to
On
.
10
If you wish the PI system to draw a thin white line over and
under the marker lines, sett
Marker white zone
to
On
.
11
If you wish to see the height marker only in expanded views,
set
Height marker in main echogram
to
Off.
.
12
Select requested
Height reference
.
• The height sensor measures the distance from the
headrope to the bottom. If you use the echo sounder in the
PI system, set
Height reference
to
Bottom
, and the height
marker will follow the bottom contour. With correct time
delay you will then see the trawl in “true motion”.
• If you can not use the PI echo sounder, set
Height reference
to
Surface
. The height is now shown using 0 m depth as
reference. The distance from the 0 meter line and down
to the marker line is then the current height of the gear.
13
Press the
ENT
button to save the chosen parameters and
return to the graphical presentation.
Spread marker line
1
Identify the sensor you wish to use, and make sure that
the sensor is connected to the PI system with correct
communication channels and update rates.
18
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