Context
The installation trunk must be mounted so that it remains vertical during normal operating conditions.
The top mating surface of the installation trunk must be protected with a blind flange or wooden cover at all times until the hull unit is installed. It is very important that this surface is clean and undamaged, because it must be watertight after the hull unit has been
installed on top of the installation trunk.
Objects protruding from the hull will generate turbulence and flow noise. This will reduce the CS90 performance. Protruding objects may be zinc anodes, transducers or even the vessel's keel. Holes and pipe outlets are also important noise sources, as well as rough surfaces caused by bad welding. Even traces of sealing compound, sharp edges, bolts or empty bolt holes will create noise.
Further requirements
If the inspection reveals errors, inaccuracies or unfortunate dispositions related to units, devices or cables, use the Installation remarks form to document these. If necessary, write a full report, and attach high resolution photos.