Each ship should be provided with a stability booklet, approved by the Ad- ministration, which contains sufficient information to enable the master to operate the ship in compliance with the applicable requirements contained in the Code. The Administration may have additional requirements. On a mobile offshore drilling unit, the stability booklet may be referred to as an operating manual.
The stability booklet may include information on longitudinal strength. This Code addresses only the stability-related contents of the booklet.
The format of the stability booklet and the information included will vary dependent on the ship type and operation. In developing the stability booklet, consideration should be given to including the following information:
- A general description of the ship;
- Instructions on the use of the booklet;
- General arrangement plans showing watertight compartments, closures, vents, down flooding angles, permanent ballast, allowable deck loadings and freeboard diagrams;
- Hydrostatic curves or tables and cross curves of stability calculated on a free-trimming basis, for the ranges of displacement and trim anticipated in normal operating conditions;
- Capacity plan or tables showing capacities and centres of gravity for each cargo stowage space;
- Tank sounding tables showing capacities, centres of gravity, and free surface data for each tank;
- Information on loading restrictions, such as maximum KG or mini- mum GM curve or table that can be used to determine compliance with the applicable stability criteria;
- Standard operating conditions and examples for developing other acceptable loading conditions using the information contained in the stability booklet;
- A brief description of the stability calculations done including assumptions;
- General precautions for preventing unintentional flooding;
- Information concerning the use of any special cross-flooding fittings with descriptions of damage conditions which may require cross- flooding;
- Any other necessary guidance for the safe operation of the ship under normal and emergency conditions;
- A table of contents and index for each booklet;
- Inclining test report for the ship, or:
- Where the stability data is based on a sister ship, the inclining test report of that sister ship along with the lightship measurement report for the ship in question; or
- Where lightship particulars are determined by other methods than from inclining of the ship or its sister, a summary of the method used to determine those particulars;
- Recommendation for determination of ship’s stability by means of an in-service inclining test.