Stability: Ballast Control Operations

Provides a good understanding of the theory and practical application of ship stability, particularly the stability of a mobile offshore drilling unit (MODU). Complies with the IADC/NI guidelines for the training of Ballast Control Operators on Mobile Offshore Units, and IMO Resolution A.891 (21).

The purpose of this course is to train Installation Managers, Barge Supervisors or Ballast Control Operators on board floating platforms (MODUs) to have a good appreciation of the stability of their craft, to understand the inherent dangers and how to combat any loss of buoyancy that may result from damage. This course covers all stability aspects of IMO Resolution A.891 (21).

To appreciate the forces of nature in the marine environment and to compensate for these forces in maintaining a safe, firm and level drilling platform.

By stability we mean the ability of a floating unit to remain upright and to resist the forces of the marine environment, the ability to measure the degree of dynamic stability of the unit and to calculate the draft, trim and list of the unit when weights -are added, removed and shifted on board.

Because of the standard in Australia the course will be conducted in the metric measurement system, however, one section will be devoted to the conversion of metric to imperial measurement, for those participants that will be working on flag vessels that are measured and tabulated in that system.

The course includes familiarisation in the use of the stability computer and a clear understanding of the information given by the computer, which is, after all, only as accurate as the information fed in initially. The stability computer is only an elaborate calculating machine, and before we ask it to perform participants must know how these calculations are compiled, be it only in a simplified form.

The International Maritime Organisation now recommends that key personnel assigned to mobile offshore drilling units are trained in the principles of stability. This course is designed to fulfil this recommendation covering all the stability details outlined in the IMO Resolution A 891 (21).


5 days: Includes the 2-day pre-course preparation for those participants who do not have the required stability training and/or experience; or

3 days: This course is designed for participants who possess the required stability training and/or experience, or those who have successfully completed the pre-course preparation.

Pre-course Preparation: Two days of basic stability for those without the necessary pre-requisite stability training and/or experience.


The following Australian Maritime College certificate will be issued to participants who successfully complete the course:

  • Ballast Control Operations Stability

Full attendance and participation in ALL activities during the course will satisfy the required performance criteria.

  • Duration: 5 days (no experience) or 3 days (with experience)
  • Course available on demand

    This course is available on demand, delivered at various locations. To express interest, please contact us.

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