What is Stability booklet and what information we get from Stability booklets?

  1. A general description of the ship;
  2. Instructions on the use of the booklet;
  3. General arrangement plans showing  watertight compartments,  closures, vents,  down flooding angles, permanent ballast, allowable deck loadings and freeboard  diagrams;
  4. 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;
  5. Capacity  plan or tables  showing capacities  and centres  of gravity for each cargo stowage space;
  6. Tank  sounding  tables  showing capacities,  centres  of gravity,  and free surface data  for each tank;
  7. 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;
  8. Standard operating conditions  and examples for developing other  acceptable  loading  conditions  using  the  information contained in the stability booklet;
  9. A brief  description of the  stability calculations   done  including  assumptions;
  10. General precautions for preventing unintentional flooding;
  11. Information concerning  the use of any special cross-flooding fittings with  descriptions   of damage  conditions   which  may  require  cross- flooding;
  12. Any other necessary guidance for the safe operation of the ship under normal  and emergency  conditions;
  13. A table  of contents and index for each booklet;
  14. 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;
  15. Recommendation for determination of ship’s stability by means of an in-service inclining test.

AMIT KUMAR

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