Unit installation

FS70 Trawl Sonar System
68 974-24007001/4.1
NOTE: As with all electronics, careful handling of the trawl
unit will reduce the likelihood of FS failures.
5.3.2.5 Corrosion
If on examination corrosion has occurred to the sonar head metal
parts these areas should be cleaned well and the area sealed with
paint or a sealant to prevent continuation of the corrosion in this
area.
WARNING: If corrosion is allowed to continue, flooding of the
unit may result.
5.3.2.6 Shaft or Transducer Damage
The transducer and shaft are protected by a flexible dome and
should be inspected for damage. If the transducer dome has
experienced an impact this could bend the shaft and eventually
allow water into the housing. If the shaft is bent the unit should be
returned to a qualified Simrad service facility for replacement of the
shaft seal assembly.
NOTE: If the sonar head is correctly installed in the
trawl unit, with proper placement of the locating block,
then damage to the transducer and shaft should not
occur.
5.3.3 FA 701 Catch and PI Sensors
The catch sensors are relatively maintenance free except to charge
the batteries. Refer to your Simrad FA701 and or PI 32 Catch
sensors operator and installation manual for the information on both
the charging of the catch sensors and the proper mounting of these
sensors on the trawl.