Section 1 General
Clasification Society 2024 - Version 9.40
Clasifications Register Rules and Regulations - Rules and Regulations for the Classification of Naval Ships, January 2023 - Volume 3 Additional Class Notations - Part 2 Naval Ship Safety - Chapter 6 Buoyancy, Stability and Controllability Assessment - Section 1 General

Section 1 General

Parent topic: Chapter 6 Buoyancy, Stability and Controllability Assessment

1.1 Application

1.1.1 The application of the additional requirements of this Chapter offers solutions for compliance with the buoyancy, stability and controllability performance requirements of Chapter III of ANEP-77 NATO Naval Ship Code (NSC) which have not already been addressed by application of the standard naval classification requirements. Where the optional requirements of this Chapter are applied, and it can be demonstrated that the vessel meets all of the performance requirements of the latest edition of the NSC Chapter III, a ship will be eligible to be assigned the STAB notation.

1.1.2 For compliance with the requirements of this Chapter the RSA2 and LMA or LNMA notations must also be assigned.

1.1.3 Where a loading instrument is provided on board the LI notation must be assigned.

1.1.4 Where a stability calculation program is provided, it is to be approved in accordance with Lloyd’s Register’s (hereinafter referred to as LR) Approval of Longitudinal Strength and Stability Calculation Programs. If it is the main source of verifying compliance with stability and buoyancy requirements for conditions outside the scope of the paper format examples provided then a duplicate back-up facility is to be provided on board.

1.1.5 A suitable subdivision and damaged stability standard, which complies with the performance requirements of Chapter III of the NSC, is to be specified, see Vol 1, Pt 1, Ch 2, 1.1 Framework of Classification 1.1.9.

1.1.6 A suitable intact stability standard which complies with the performance requirements of Chapter III of the NSC is to be specified, see Vol 1, Pt 1, Ch 2, 1.1 Framework of Classification 1.1.9.

1.1.7 Where the Owner requires specific extreme damage or extreme flooding events to be assessed, over and above the events inherent in the standards above, those extreme events are to be specified in the Concept of Operations (ConOps).

1.1.8 A sea-keeping analysis or model tests are to be undertaken, see Vol 3, Pt 2, Ch 6, 2.4 Safety of embarked persons 2.4.1. The range of environmental conditions used in the analysis or tests is to be consistent with the ConOps (e.g. specific headings for aircraft operations).

1.2 Documents required for design review

1.2.1 Information required to be submitted:

  1. Information regarding operation of the vessel:

    • ConOps.
    • Sea-keeping analysis report or model test results.

  2. Information required to be submitted for approval:

  3. Information regarding the ship’s equipment:

    • A register of essential life saving equipment.

1.2.2 Information required to be provided on board:

  1. Plans:

    • Watertight and weathertight integrity plan.

  2. Instructions:

    • Instructions covering the operation of watertight doors whilst at sea.

  3. Information:
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