User guide

901-10037001/1.1 FS 20/25 Operators Manual
Page 1.6 System Familiarization
Kongsberg Simrad Mesotech Ltd.
Port Coquitlam, BC - Canada
1.1.6 Deployment Housing Unit
The trawl deployment housing unit is made from polyurethane and designed for the
harshest of environments, yet it is easy to handle. The FS 20/25 trawl unit contains
the vertical sonar head, the horizontal scanning trawl sonar, the temperature and
depth sensor module and the catch receiver. The mounting kit supplied contains the
strain relief and other hardware for attaching the trawl cable to the trawl headrope.
The trawl cable is connected to the trawl sonar by a watertight connector and a
locking sleeve. Commands are sent down the cable from the processors to operate
the sonar. The sonar image and sensor data are sent up the cable to the processor
and displayed on the appropriate monitor.
1.1.7 Jointing Tool
Jointing tools and materials are required for splicing the trawl cable and attaching
the trawl “pigtail” connector to the trawl sonar. Simrad supplies jointing tool kits
especially designed for coaxial cable with a breaking point of 1500kg. The jointing kit
will allow you to make 10 cable joints.
1.1.8 Catch Sensors
The catch sensor “eggs” are wireless sensors mounted on the cod-end of the trawl
net to detect the stretch of the net as it fills up with the catch. When sufficient stretch
of the net occurs, the catch sensor sends an acoustic signal to the trawl sonar
sensor module through the catch receiver.
This information is then sent to the processor and displayed on the monitor.
The sensors are of a rugged construction in order to withstand the strain from
winches and the power block. The operator can use up to four sensors
simultaneously. The catch sensors are equipped with rechargeable batteries.
1.1.9 Printer Option
A parallel output port is available on the rear panel of the HP PC processor unit for
connecting a HP DeskJet color printer. This option allows hard copies of the Sonar
images to be printed using another software application “PC Paint”.