23.2.1 The operating environment for the submarine and duration in each area is to be
defined, including port and harbour areas where the submarine will be moored.
23.2.2 Suitable materials are to be chosen for the external and internal, systems, equipment
and components exposed to seawater. Materials are to be chosen that inhibit marine
growth or the components suitably protected. Where required, materials are to be
suitably conditioned before installation, e.g. filters, coolers and pipework.
23.2.3 The submarine, systems, equipment and components that are required to operate with
marine growth in normal operating conditions are to be identified. They shall be
able to operate with defined levels of marine growth or be fitted with suitable
protection measures to prevent it.
23.2.4 Submarine, systems, equipment and components that are only required to operate free
from marine growth in normal operating conditions but may be exposed to marine
organisms are to be suitably protected and able to withstand removal procedures.
23.2.5 The submarine, systems, equipment and components vulnerable to mould growth in normal
operating conditions are to be identified and provided with suitable protection
measures to prevent it.