Spread Marker Line - Simrad PI DEPTH Instruction Manual

Simrad PI Spread/Depth
18
2 Ensure that you have a graphical presentation active on your
PI system.
3 Press the button to open the
ADJ
4 Press the
GAIN+
dialogue.
5 Observe the list of sensors that appear. Only those sensors
that can provide a marker line are listed.
6 Set to On.
Auto
• 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
Off. You must then enter the calculated value into the
column.
Delay
7 Enter requested value for
• Use this parameter to control the thickness (in pixels)
of the marker line(s).
8 For every marker line, set
9 If you wish to see the marker lines in the expanded views
(bottom expansion, zoom and phased range), set
marker in expansion
10 If you wish the PI system to draw a thin white line over and
under the marker lines, sett
11 If you wish to see the height marker only in expanded views,
set
Height marker in main echogram
12 Select requested
• The height sensor measures the distance from the
headrope to the bottom. If you use the echo sounder in the
PI system, set
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
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 button to save the chosen parameters and
ENT
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.
Graphic setup
button repeatedly to reach the
.
Width
to On.
Show
to On.
Marker white zone
to Off..
.
Height reference
to Bottom, and the height
Height reference
menu.
Marker line
to
Auto
Sensor
to On.
Height reference
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