Simrad PX MultiSensor Catch monitoring sensor
In spread measurements, two sensors
always work in pairs. One is used as a “spread” sensor,
while the other is a “remote”. Depending on sensor type,
both these sensors may also provide additional measurements.
Use a “spread” sensor on the port door and a “remote”
sensor on the starboard door. Both sensors are normally mounted in
special adapters, but you may also attached them to the wing-end or
warp using snap hooks or rope.
The “spread” sensor
communicates with the “remote” sensor using a special
transverse communication link. By means of this link it measures the
exact distance between the two sensors. The information is transmitted
to the vessel by the “spread” sensor.
As you already
know, correct door spread is important in order to obtain the correct
sweep-angle, as this ensures optimal trawl performance. Door behavior
and stability during shooting and towing is also monitored by these
Many regard this measurement to be one of the most
important to obtain efficient trawling.