Seaworthiness of the Ship


This will help people studying for their master 200 and the officer of the Watch (yacht 500).

You will learn about the fundamentals of watertight integrity, the principles of stability, the effects on stability of different vessel operations and how to prepare for heavy weather.

By completing this learning, you should be able to:

  • Understand fundamentals of watertight integrity, and the closing of all openings including hatches, access hatches and watertight doors.
  • Understand the difference between good stability and poor stability, and recognises the warnings signs of the latter.
  • Describes the effect on stability of raising and lowering weights, low freeboard, obstruction of deck freeing arrangements and scuppers and slack tanks.
  • Preparations for heavy weather, ensuring and maintaining watertight integrity.

This online training is aligned with the UK MCA Master (Code vessels less than 200 GT) / Officer of the Watch (Yachts less than 500 GT) oral examination syllabus.

You can see the contents of what is contained in this unit in the contents list below.

  1. Ship Stability Definitions
  2. The Different Conditions of Stability
  3. Transverse Stability
  4. Suspended weights
  5. List on a Vessel
  6. Free Surface Effect
  7. Longitudinal Stability
  8. Interpreting GZ Curves
  9. Signs of poor stability
  10. Watertight integrity
  11. Preparing for heavy weather

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