Operation Manual

Simrad PI54
86
850-165186 / Rev.B
Special features for trawl marker lines
When you have chosen a gr aphic presentation, you can choose
to superimpose the information from the echo sounder, and then
add marker lines to see where your sensors are located in
relation to the bottom and fish echoes. When you use a pelagic
or bottom trawl, the PI54 offers certain special features to
provide additional information.
(A) = Numeric depth display, Sensor “6D” placed on the
headrope
(B) = Marker line from the footrope, added by using the Manual
trawl marker setting
(C) = Marker line from the headrope using the data from Depth
sensor “6D”
The recommended sensor configuration to monitor the trawl
opening is to use one Height or Depth sensor on t he headrope,
and one Depth sensor on the footrope. However, if you only use
one of these sensors, place it on the headrope. The PI54 will
then manually draw the trawl opening markers for you provided
that you enter the typical height of the trawl opening.
The following parameters will provide the extra information
related to trawl markers:
• Headrope and f ootrope sensors: You need to tell the PI54
which Depth and/or Height sensor(s) you have placed on the
footrope and/or headrope of the trawl.