2.2.1 The categorisation of systems, equipment and components shall be carried out in
accordance with a categorisation process which fulfils the aims of this Section.
2.2.3 The categorisation process shall be agreed by LR and all stakeholders.
2.2.4 The designer shall list all systems, equipment and components on the submarine and
establish their category.
2.2.5 The categorisation process shall define the categories in relation to safety
criticality and the procedure by which systems are assigned to those categories.
2.2.6 The process shall recognise system dependencies and the contribution of systems to
submarine functions.
2.2.7 The process shall recognise the potential impact of the systems, equipment and
components on embarked persons.
2.2.8 Equipment and components shall be assigned the same category as the system of which
they are a part. Equipment and components assigned a lower category than the system
of which they are a part, shall be fully justified, with a risk assessment, safety
argument and hazard analysis.
2.2.9 Additional specification requirements such as susceptibility, military
functions or performance requirements for particular systems, equipment and
components may result in those systems, equipment and components being assigned to a
higher category in agreement with relevant stakeholders.
2.2.10 Any justification for assigning equipment and components to a lower
category than the system of which they are a part based on redundancy, shall include
assessments of capacity, diversity, reliability and failure modes, including common
modes of failure, for all redundant equipment and components in the system and the
system itself, relative to the whole boat risk assessment and safety argument.
2.2.11 Policies, procedures and requirements for the design and construction of systems,
equipment and components, their verification and validation, shall recognise and
take account of safety criticality categories and provide for the required
integrity.