Operation Manual

Operational procedures

850-165186 / 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 m ar ker 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 sens or, but from a feeler. Such feelers are

often built into the echo sounder transducers.

1 Ensure that a proper feeler is connected to the PI54.

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.