Section 1 General Requirements
Clasification Society 2024 - Version 9.40
Clasifications Register Rules and Regulations - Rules and Regulations for the Construction & Classification of Submersibles & Diving Systems, July 2022 - Part 6 Electrical Installations and Control Engineering Systems - Chapter 2 Control Engineering Systems - Section 1 General Requirements

Section 1 General Requirements

Parent topic: Chapter 2 Control Engineering Systems

1.1 General

1.1.1 This Chapter applies to all submersibles and underwater systems intended to be classed and are in addition to other relevant sections of the Rules.

1.2 Plans

1.2.1 Plans and documentation required by Pt 6, Ch 2, 1.2 Plans 1.2.2 to Pt 6, Ch 2, 1.2 Plans 1.2.6 are to be submitted.

1.2.2 Where control, alarm and safety systems are intended for the machinery equipment as defined in Pt 6, Ch 2, 1.2 Plans 1.2.3 the following is to be submitted:
  1. Description of operation with explanatory diagrams;
  2. Line diagrams of control circuits;
  3. List of monitored points;
  4. List of control points;
  5. List of alarm points;
  6. Test schedules which should include methods of testing and test facilities provided;
  7. Functional Safety assessment (SIL assessment):
  8. Failure Mode and Effects analysis (FMEA).
1.2.3 Plans for the control, alarm and safety systems of the following are to be submitted:
  1. Air compressors;
  2. Batteries and accumulators for electric and hydraulic power;
  3. Electric generating plant;
  4. Hydraulic power units;
  5. Life-support systems;
  6. Lifting gear;
  7. Steering gear and control surfaces;
  8. Thruster units;
  9. Miscellaneous machinery and equipment (where control, alarm and safety systems are specified by other sections of the Rules;
  10. Gas Sampling;
  11. Hyperbaric Monitoring and Control System.

1.2.4 Diving emergency alarm — Details of the diving emergency alarm linking the diving operation control station, the accommodation the diving office, the bridge and Offshore Installation Manager’s (OIM’s) office as applicable.

1.2.5 Control stations Location and details of control stations are to be submitted, e.g. control panels and consoles. Plans showing the location and details of control stations, e.g., control panels and consoles, location and details of controls and displays on each panel. Details of user interface specifications. A general arrangement plan of control rooms, showing the position of consoles, handrails, operator area, lighting, door and window arrangements. Drawing of HVAC systems including vent arrangements.

1.2.6 Fire and gas detection systems — Plans showing the system operation, the type and location of fire and gas detector heads, manual call points and the fire and gas detector indicator panel are to be submitted.

1.2.7 Approved system — Where it is intended to employ a standard system which has been previously approved, plans are not required to be submitted, providing there have been no changes in the applicable Rule requirements the building port, where applicable, and the date of the previous approval is to be advised.

1.2.8 Programmable Electronic Systems - In addition to the documentation required by Pt 6, Ch 2, 1.2 Plans 1.2.2 the following is to be submitted:
  1. System requirements specification.
  2. System integration plan, see Pt 6, Ch 1, 2.14 Programmable electronic systems – Additional requirements for integrated systems 2.14.2. of the Rules and Regulations for the Classification of Ships, July 2022.
  3. Failure Mode and Effects Analysis (FMEA), see Pt 6, Ch 1, 2.14 Programmable electronic systems – Additional requirements for integrated systems 2.14.5. of the Rules and Regulations for the Classification of Ships, July 2022.
  4. Details of the hardware configuration in the form of a system block diagram, including input/output schedules.
  5. Hardware certification details, see Pt 6, Ch 1, 2.10 Programmable electronic systems - General requirements 2.10.5 and Pt 6, Ch 1, 2.13 Programmable electronic systems - Additional requirements for essential services and safety critical systems 2.13.3. of the Rules and Regulations for the Classification of Ships, July 2022.
  6. Software quality plans, including applicable procedures, see Pt 6, Ch 1, 2.10 Programmable electronic systems - General requirements 2.10.20. of the Rules and Regulations for the Classification of Ships, July 2022.
  7. Factory acceptance, integration and sea trial test schedules for hardware and software.
  8. Details of data storage arrangements, see Pt 6, Ch 1, 2.10 Programmable electronic systems - General requirements 2.10.10 and Pt 6, Ch 1, 2.13 Programmable electronic systems - Additional requirements for essential services and safety critical systems 2.13.6. of the Rules and Regulations for the Classification of Ships, July 2022.

1.3 Control, alarm and safely equipment

1.3.1 Major units of equipment associated with control, alarm and safety systems defined in Pt 6, Ch 2, 1.2 Plans are to be surveyed at the manufacturer’s works and the inspection and testing is to be to the Surveyor’s satisfaction.

1.3.2 Equipment used in control, alarm and safety systems should be suitable for its intended purpose.

1.3.3 Assessment of performance parameters, such as accuracy, repeatability, etc., are to be in accordance with an acceptable National or International Standard, e.g. International Electro-technical Commission, Publication 51 Recommendations for indicating electrical measuring instruments and their accessories.

1.4 Alterations and additions

1.4.1 When an alteration or addition to the approved system(s) is proposed, plans are to be submitted for approval. The alterations or additions are to be carried out under survey and the inspection, testing and installation are to be to the Surveyor’s satisfaction.

1.4.2 Details of proposed software modifications are to be submitted for consideration. Where the modification may affect compliance with these Rules, proposals for verification and validation are also to be submitted.

1.4.3 Software versions are to be uniquely identified by number, date or other appropriate means. Modifications are not to be made without also changing the version identifier. A record of changes to the system since the original issue (and their identification) is to be maintained and made available to the LR Surveyor on request.

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