Transcription of COURSE OBJECTIVES CHAPTER 4 4. STABILITY
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COURSE OBJECTIVES CHAPTER 4 4. STABILITY
I COURSE OBJECTIVES CHAPTER 4 4. STABILITY 1. Explain the concepts of righting arm and righting moment and show these concepts on a sectional vector diagram of the ship s hull that is being heeled over by an external couple. 2. Calculate the righting moment of a ship given the magnitude of the righting arm. 3. Read, interpret, and sketch a Curve of Intact Statical STABILITY (or Righting Arm Curve) and draw the sectional vector diagram of forces that corresponds to any point along the curve. 4. Discuss what tenderness and stiffness mean with respect to naval engineering. 5. Evaluate the STABILITY of a ship in terms of: a. Range of STABILITY b. Dynamic STABILITY c. Maximum Righting Arm d. Maximum Righting Moment e. Angle at which Maximum Righting Moment Occurs 6. Create a Curve of Intact Statical STABILITY for a ship at a given displacement and assumed vertical center of gravity, using the Cross Curves of STABILITY .
buoyancy is located at the centroid of the underwater volume of the ship. When the ship is heeled over by an external moment the underwater shape changes and thus the centroid moves. Where the center of buoyancy moves with respect to the center of gravity defines the stability characteristics of the ship as the ship is heeled over.
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