Instruction manual

Display presentations
• Marker line delay: The echo sounder information is
provided by the transducer located below the vessel’s
hull. The sensor is however located on the gear, and may
be position several hundred meters behind the vessel. In
order to compensate for this physical distance you can
add the
Marker line delay. You must calculate this delay
based on the vessel’s speed, the distance from the aft
stern to the gear, and the current depth of the gear.
6 Press the
ENT button to save the chosen parameters and
return to the graphical presentation.
The depth- and spread marker lines are shown in the graphical
presentation using solid lines and the same colours a s the
background in the numerical presentation. In order to read the
accurate depth you can observe the depth scale on the right hand
side, or read the value in the numerical presentation.
Graphical presentation on PI44 and PI54
This section contains a procedure to explain how you can set up
the PI44 and PI54 to show you a graphical presentation of the PI
Remote/Depth data providing depth markers. It also explains
how you can set up a spread marker line using the information
from a PI Spread sensor.
The purpose of the depth- and distance markers on the graphical
presentation is to keep an eye on how deep the trawl doors are
situated, and how far apart they are. The depth sensor in the PI
Remote/Depth sensor measures the distance from the sea surface
and down to the sensor, w hile the PI Spread sensor communicates
with the PI Remote/Depth sensor to measure t he distance.
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