Operational procedures
85
850-165085 / Rev.B
Spread marker line
The purpose of this marker line is to provide an easy way to
monitor the distance between the trawl doors.
1
Identify which of the sensors that is the Spread sensor.
2
Set the marker line to ON.
3
Enter the preferred settings for
Marker line thickness
and
Marker line delay
.
4
Press
ENT
to save the settings and return the the graphic
presentation.
The Spread marker line is presented on the
Graphic
display
with a continuous line. The colour of the line is the same as the
background colour in the numeric presentation. To read the
distance between the trawl doors, consult the depth range on the
right side of the display, or the readout in the
Numeric
display.
If the trawl door distance is reduced or increased, this will be
easily detected as the marker line moves up or down. Note that
you do not monitor the depth of the trawl doors even though
you use the depth scale, the scale is used as a range scale.
Surface temperature marker line
The purpose of this marker line is to provide an easy way to
monitor the surface temperature. Note that this is NOT a reading
from a temperature sensor, but from a feeler. Such feelers are
often built into the echo sounder transducers.
1
Ensure that a proper feeler is connected to the PI44.
2
Set the marker line to
On
.
3
Enter the preferred settings for
Marker line thickness
and
Marker line delay
.
4
Use the ADJ button to open the
Temperature
setup page.
5
Press
ENT
to save the settings and exit to the graphic
display presentation.
The Temperature marker line is presented on the
Graphic
display as a continuous line.
Related topics
→
Graphic setup, page 184
→
Marker line setup, page 197
→
Temperature setup, page 220
→
Trawl calculator, page 221
