2.2.1 The Navy is to define required signature thresholds for different operating
conditions. Sufficient information is to be provided to enable the verification
activities to be effective.
2.2.2 The Navy is to define the operating environment and conditions in which low signature
operation will be required.
2.2.3 As a minimum, the signature policy communicated to LR shall address the safety of the
submarine when operating in various low signature states. Sufficient machinery is to
be available during all low signature states to provide for the safety of submarine
functions and embarked persons, in particular:
- Strength and integrity;
- Manoeuvring and control;
- Power and propulsion;
- Provision, storage and distribution of electrical
power;
- Support and protection of life; and
- Munitions handling.
2.2.4 An analysis is to be undertaken to determine the low signature performance of the
submarine.
2.2.5 Systems, equipment and components are to be designed to achieve the signature levels
required. The capability of equipment required to operate in the low signature state
is to be demonstrated through testing or analysis.
2.2.6 Machinery not required for low signature states should be suitably isolated to
prevent operation.
2.2.7 Machinery not required for low signature states is to be prevented from automatic
starting or changeover during a low signature state.
2.2.8 Control and alarm systems should be suitable for operation in a low signature
state.
2.2.9 Material selection for systems, equipment and components is to recognise the
signature requirements.
2.2.10 The submarine, systems are to be subject to testing and trials to demonstrate the
signature levels.
2.2.11 Survey and inspection is to be undertaken to ensure the signature hygiene levels are
maintained.
2.2.12 Procedures are to be in place to control noise emissions from the submarine when
operating in the low noise state.