Kongsberg EM 710, Installation Manual

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Installation examples
5.2 Gondola
A gondola is a streamlined pod mounted under the hull of the
ship. It can either be welded or bolted under the hull plates.
The idea is to make a gap between the ships hull and the
transducers.
This gap shall prevent aerated water around the transducers, and
thus generate an operational weather window as wide as possible.
See Gondola for 0.5 x 1 degree system on page 35
5.2.1 Logistics and references
Logistics and references
Logistics and references Safety - Refer to the general safety
procedures.
Personnel
- Trained mechanical workers
Ship location - Dry dock
Special tools - Torque wrench
Protection - Protective paint, zinc anodes
References
- None
Procedure
1 Design and manufacture the transducer gondola.
• The gondola must hold the two casings; one for the Tx
and one for the Rx transducer arrays. The appropriate
drawings describing these casings are included in the
Drawing File.
• The gondola will be water filled. To let the air escape,
make a suitable hole in the rear end close to the vessel’s
hull.
• Our recommendation is to place an “debris knife” in the
forward end of the gondola.
2 Prepare the inside surface protection of the gondola. Paint
with protective paint, and mount zinc anodes.
3 Mount the transducer gondola under the vessel’s hull.
4 Check the inside surface protection of the gondola.
• Add paint or zinc as required.
5
Protect the outer surface of the gondola.
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