20 User’s Manual Innomar SES Parametric Sub-bottom Profilers
20 Innomar Technologie GmbH (2020-09)
After finishing all welding, the sea chest has to be cleaned and painted. To reduce reverberation
the sea chest’s walls and ceiling should be lined by closed-cell foam (10–20 mm thick, e.g. neo-
prene RS components 733-6750). This neoprene foam has to be provided by the ship yard.
!
It is the solely responsibility of the shipyard to approve strength and thickness of all steel
parts building the sea chest or blister/gondola.
Sea chest with flange, threaded holes and
the two (bigger) water inlet holes prepared
by the ship yard (left) and transducer
mounted into a dome/blister to prevent air
bubbles washed below the transducer (right).
Cable Routing
There are one (ore more) transducer cable(s) and one ground wire to be routed from the trans-
ducer to the topside unit. Preferably this is done via stand pipe with a diameter of at least 90 mm.
Note the cable and connector dimensions given section 2.2.1 on page 14. Depending on the
height above water level the top end of the stand pipe might need to be sealed by ROXTEC cable
sealings or similar. In any case the sea chest needs to be vented after flooding. Since air may
also accumulating in the sea chest over time while travelling in rough sea, it’s good to have some
permanent air escape route.
Hull-Mount Transducer Check / Antifouling
During and after installation, double check the orientation of the transducer (forward-pointing ar-
row). Any mistake made will significantly reduce the system performance. Transducer and drilling
template have clear markings to indicate forward direction.
The sea chest needs to be flooded with sea water during operation. To ensure this, there are two
water inlets in the flange of the mounting frame. These two holes must not be blocked.
!
Transducer forward direction is marked (arrow) on top of the transducer.
There are 2 water-inlet holes in the mounting frame, which have to be free.
To avoid biofouling reducing the system performance, the transducer needs to be coated using
a water-based anti-fouling paint, please do not use any other paint since this might destroy the
transducer:
Jotun SeaQuantum Ultra S
International Marine Intersleek 1100SR
The anti-fouling coating should be checked and renewed at least every second year.
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