List and Trim in Ship Stability

0
Certificate

Paid

Language

Level

Intermediate

Access

Free

Last updated on June 20, 2026 9:17 am

This marine safety course explores the maths behind a ship’s list and trim and explains how to maintain statical stability at sea and comply with SOLAS.

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List and trim are two vastly important concepts to ship stability. Other concepts that we cover include the centre of gravity on a ship, the righting moment and the righting lever. You will study metacentre concepts, along with the formula used to calculate the list and trim after loading. You will also learn concepts of permeability, bilging and cross-flooding arrangements once you complete this comprehensive course.

What You Will Learn In This Free Course

  • Evaluate the curve of intact statica…
  • Describe the effects on stability by…
  • Evaluate the concept of metacenter a…
  • Describe the effect of loading and d…
  • Evaluate the curve of intact statical stability to determine stability data
  • Describe the effects on stability by the movement of weights
  • Evaluate the concept of metacenter and its importance for ship stability
  • Describe the effect of loading and discharging on CG and stability
  • State the formula used to calculate the list
  • Explain the effect of slack tanks on stability
  • Explain the longitudinal stability terms and the effects of trim on ship stability
  • Outline the intact stability requirements for a ship
  • Explain the bilging of compartments and their effects on stability
  • Evaluate the dewatering process that will be necessary in case of a hull breach
  • Outline the importance of closing watertight doors under the partial loss of buoyancy
  • Explain cross-flooding arrangements
  • Metacenter and Free Surface Effects

    In this module, you will be introduced to the curve of intact statical stability and the range of stability at different angles of the heel. You will also be introduced to the concept of metacenter, derivation of the formula for the list. The differences between the stiff and tender vessels, as well as the concepts of the free surface effect, will also be highlighted

    Trim and Bilging

    In this module, you will be introduced to concepts of pitch, and trim as well as the concepts of bilging and permeability. You will also be introduced to the relationship between the GZ curve and the intact stability requirements, as well as the concepts of dewatering, cross flooding arrangements. The functions of hydraulically operated watertight doors will also be highlighted.

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      List and Trim in Ship Stability
      List and Trim in Ship Stability
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