autumn 2018

TEK-3011 Ship stability - 10 ECTS

Sist endret: 01.03.2019

The course is provided by

Faculty of Science and Technology


Tromsø |

Type of course

The course may be taken as a singular course.

Admission requirements

Opptakskode 9371

The course requires a bachelor in nautical science, or other equivalent qualifications.

Course content

  • Introduction to stability of ships and floating structures, including; hydrostatic equilibrium of a floating body and intact stability regulations, including internal weight movement¿s e.g. heavy-lift.
  • External forces - environmental modelling.
  • Linear and nonlinear dynamic stability, parametric roll - Mathieu-effect, stability in flooding and damage condition and instability of ships.
  • Probabilistic assessments of ship and semisubmersibles rig capsize. And the probabilistic regulatory framework.
  • Stability aspect related to various ship and floating structures. Such as optimization of aspect related to design and operational characteristics, applicability of rules and regulations.
  • Computer methods. Use of relevant software, e.g. MATLAB or NAPA, for calculations and for visualizations.
  • Use of a model tank for assignments and tutorials/lab-demos, using different ship models.
  • Revision and analysis of typical critical scenarios and accidents investigation. Stability aspects of various operational situations, such as;
    Heavy lift, rig-moves and anchor handling, high-speed vessels, towing, icing, sub-sea operations, fishing, aquaculture, offshore vessels, passenger and ro-ro vessel, bulk and semisubmersibles bulk and ice breakers.
  • Design for safety.

Objectives of the course


The student have:

  • A thorough knowledge and understanding of the theoretical concepts of intact and damage stability.
  • Thorough knowledge and understanding of static and dynamic stability.
  • Knowledge of the regulatory framework in deterministic and probabilistic damage stability.
  • Understanding how waves and external forces influence the stability of all seagoing vessels.
  • Understanding of stability issues, of various vessels and floating structures, related to their design and operation.
  • Knowledge to conduct analysis of typical selected accidents and damage cases, and a thorough understanding of how this affects critical stability factors.                                                               


The student is:

  • Able to carry out and make use of existing knowledge and theories of ship stability, in real situations.
  • Able to analysis intact and damage stability.
  • Able to analysis static and dynamic stability.
  • Able to use the regulatory framework in deterministic and probabilistic damage stability.
  • Able to analysis how external forces influence the stability of all seagoing vessel.
  • Be able to analyse stability in critical scenarios and accidents.


The student is:

  • Able to utilize stability aspects and use appropriate theories to identify critical risk factors of ships and floating structures.
  • Able to reflect on their professional practice, work in groups, manage report writing, presentation, and function in a multi-disciplinary team.

Language of instruction


Teaching methods

3hours x 12 weeks; lectures. 2hours x 12 weeks; exercises/laboratory work.


One project report, two laboratory assignments and five exercises tasks.

5-hour written exam. Letter grading A - F.

Date for examination

Written examination 30.11.2018

The date for the exam can be changed. The final date will be announced in the StudentWeb early in May and early in November.


Recommended reading/syllabus

The syllabus will be presented at the beginning of the course.