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• Select a place where interference from other transducers is minimal. The hull unit
should be at least 2.5 m away from the transducers of other equipment.
• No obstacle should be in the fore direction since it causes a shadow zone and aer-
ation, resulting in poor sonar performance.
• Select a mounting location, considering the ship's bottom structure and other sonar
equipment. If the ship's bottom structure and transducer for other sonar equipment
is projected more than the FSV-75 transducer, the FSV-75 cannot display sonar
echoes correctly. Similarly, if the FSV-75 transducer blocks other sonar transducer,
other sonar equipment cannot display the sonar echoes correctly.
• In the case of a bilge keel, select a location as far from the bilge as possible.
• Select a location away from indents and protrusions on the hull, especially indents,
as they can create noise interference and cause poor sonar performance.
• Referring to the outline drawings at the back of this manual, allow sufficient space
for maintenance and service.
• If the ambient temperature will be below
0°C, provide the sonar compartment with
a heater to keep the temperature above
0°C. The hull unit can not work if the am-
bient temperature is below 0°C.
• Prepare a secure and firm safety fence for
the hull unit, to prevent accidental injury
from the moving hull unit. The safety
fence should be easily removable for
maintenance and allow room for the con-
nected cables to swing freely with pitch,
roll and heave. The power switch on the
control box should be operable from out-
side the safety fence.
• After you mount the hull unit, be sure to in-
stall anti-vibration stays.
1. MOUNTING
1200 mm
500 mm
Bow direction
Compartment
(Safety fence)
1-3
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