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INSTALLATION
4.3
Transducer Installation
o
The transducers are generally supplied with connectors assembled in Single Channel or Dual
Channel cable arrangement. When preparing the initial setup of the survey system, the SBES
UI will suggest the standard cable connection depending on chosen transducer type (see
section 4.4 Configuration in SBES UI).
o
In all types of installations, the transducer radiating face must remain as parallel to the water
surface as possible while the vessel is moving.
o
Transducers should be mounted at least 0.3 meter below the waterline.
o
A preferred mounting location is near the keel of the vessel in an area where the planing attitude
of the hull at speed and the pitch and roll angles of the vessel in seas have the least effect.
o
The transducer should be mounted far enough aft of the bow so that bubbles generated by
the bow wave will not pass over the face of the unit.
o
Transducers should be located away from sources of turbulence and cavitation bubbles such
as propellers, bow thrusters and hull protrusions.
o
Considerations should also be given to sources of mechanical noise generated within the vessel
(engines, props, pumps, generators, etc.). In some severe cases of mechanically coupled noise,
vibration-isolating mounts may be required to decouple the transducer from the hull.
For further details on possible sources of interference with the transducer installation, see section 6.3
Interference Considerations.
4.3.1
Through Hull
The top side of the transducer is accessible from inside the vessel while the transducer face is
exposed to the water.
Hull
NOTE: Transducer must be flush with hull
Ensure that installations through the hull are made correctly to ensure the safety of
the personnel and boat.
Avoid turbulence around the transducer by installing a fairing with a sloping forward edge
ahead of the unit. The fairing will improve the hydrodynamic performance by smoothing the
flow of water over the face of the transducer.
Care should be taken to protect the transducer from damage. The installation of a
fairing will contribute to reducing the risk of impact damage.
Echotrac E20 Operator's Manual8
Version 8
Nut
Washer
Narrow beam transducer
Figure 6: Transducer mounted through the hull
p. 24 of 60
Uncontrolled Technology Subject to Restrictions Contained on the Cover Page.
Water sealing and/or insulating
bushing
Seal gap with marine caulk
November 25, 2020
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