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3 Ιαν 2021 · The easiest and handiest tool for analysing a surface ship’s stability, is by graphs or curves. In fact, a ship designer or an officer on-board should be able to know the stability characteristics of a ship just by looking at the curves.
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.
The light ship value includes weights for spare tailshaft and stowage as given on Sheet 81B ([12821 + 29]/100 = 128.50). Add lines 28 and 29 to obtain line 30 displacement and hogging and sagging numerals for departure and arrival conditions.
The illustration below shows 3 GZ curves for 3 different types of vessels. Curve 1 is for a traditional deck vessel. The curve peaks at approx. 25 degrees and ex-tends to approx. 70 degrees. Curve 2 is a wide flat-bottomed vessel. The curve is initially steeper than curve 1. This means that the vessel is more rigid - it
Contents. General particulars. Plan showing cargo spaces, storerooms and tanks. Cargo and tank capacities. Hydrostatic particulars. Tabulated KN values. Maximum KG values. Angle of Heel data. Grain: Full holds and full tween decks, Volumetric Heeling Moments (VHM).
5 Απρ 2021 · 1. Center of Gravity (CG): The longitudinal position of the CG with respect to any reference point on the ship is called the longitudinal centre of gravity (LCG). Usually, the reference point for locating the LCG is either of the forward or aft perpendiculars.
In Chapter 4 we will study five areas: The concept of a ship’s Righting Moment (RM), the chief measure of stability. KG and TCG changes and their effects on RM. How Stability is effected by Damage to the Hull using the “Added Weight” method. Effects of a “Free Surface”. Effects of Negative GM on ship stability.
