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Beginner Hydrostatic Curves in Ship Stability

The free online course discusses displacement, hydrostatic curves, and transverse statical stability concepts.

Publisher: ADU
This course on displacement and hydrostatic curves teach you the concepts of buoyancy, reserve buoyancy, and center of buoyancy. Investigate how to use the content and readings of the hydrostatic curves and hydrostatic tables to calculate a ship’s displacement. Study the moments of statical stability at small and large angle heels. Start this course today to improve your understanding of displacement and hydrostatic curve
Beginner Hydrostatic Curves in Ship Stability
  • Duration

    3-4 Hours
  • Students

  • Accreditation


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Displacement and hydrostatic curves is a course that introduces you to the essential feature that makes up a successful boat design. We introduce you to the concepts and definition of buoyancy, together with the principle of floatation. Explore the vertical and longitudinal distance relating to the draft of the ship, along with the law of floatation and the concepts and characteristics of displacement tonnage. We discuss the differences and relationship between displacement and the mean draught of a ship. You’ll become familiar with displacement tables, deadweight scales, and draught curves used to relay displacement information at different draught levels. There are two constituents of displacement, which include; light and load-displacement. We will also cover the concepts and functions of deadweight and discuss the relationship between the waterplane area and tons per inch, along with the effect of tons per inch on the ship’s draft.

Next, we work through the trim concepts, functions, calculations and moment to change the trim by 1 inch. Study the functions of fresh watermarks for the ship. Analyze the relationship between freshwater allowance, displacement of the ship in saltwater, and tonnes per centimetre. You will learn how a draft increases from saltwater to dock water and vice versa. We outline the draft change when calculated between saltwater and dock water. We also demonstrate the effect of a constant draft on the ship’s displacement. We then illustrate the calculation of freshwater allowance, dock water allowance, and tons per inch in various densities. You will become skilful at understanding the content, readings, and importance of hydrostatic curves and the concept and functions of the hydrostatic draft. We will reveal the roles of the hydrostatic tables and teach you the differences between the hydrostatic draft and the amidships draft. 

Furthermore, you will become knowledgeable about the position and working principle of the centre of floatation. We teach you about the calculation of BM and KM the calculation of BM in rectangular waterplanes, box-shaped vessels and triangular-shaped vessels. We will also cover the principles of transverse statical stability, explain the stable, neutral and unstable equilibria, and teach you the transverse metacentre. In addition, you will explore the moments of statical stability at small and large angles of the heel, understand the loll angle, and the correction of the angle of loll. Finally, we discuss the free surface effect and effect of slack tanks. This course will be of great interest to students, researchers, and anyone interested in propulsion systems and load-lines. So, register for this course and start learning today.

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