This module breaks down the principles and practical application of vessel stability. It is designed to give you a clear and practical understanding of how a vessel’s stability is assessed, maintained and affected by loading, ballasting, damage, free surface effect and changes in displacement, trim and draught.

It examines key stability concepts including centres of gravity and buoyancy, metacentric height, righting levers, GZ curves, statical and dynamical stability, angle of loll, list, trim, free surface effect, cargo loading, dry docking and damage stability. By the end of the module, you’ll be equipped with the knowledge to interpret stability information and explain how stability is managed safely in accordance with international standards and best practice.

Please note that while this module does include some formulas and calculations to benefit your understanding of the theory surrounding the subject, it is not intended to be used to pass the SQA Stability papers.

We want to make sure that this content is the best it can be, so please don't hesitate to let us know if there's anything missing or not quite right, or even if you just have ideas on how to improve it.

This module is in a pre-release, development phase, with content being added and improved in response to your comments. Your feedback is a very important part of this process so please don't hesitate to propose improvements or to highlight any errors, no matter how small.

Please leave comments in the review portal or via WhatsApp on +447900268843.