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Chapter 1, Section 4Common Structural Rules for Bulk CarriersSymbol Meaning Unitsγ Safety factor -δ Deflection / Displacement mmθ Angle degξ Weibull shape parameter -ρ Density t/m 3σ Bending stress N/mm 2τ Shear stress N/mm 22. Symbols2.1 Ship’s main data2.1.1L : Rule length, in m, defined in [3.1]L LL : Freeboard length, in m, defined in [3.2]L BP: Length between perpendiculars, in m, is the length of the ship measured between perpendiculars takenat the extremities of the deepest subdivision load line, i.e. of the waterline which corresponds to thegreatest draught permitted by the subdivision requirements which are applicableFP LL: Forward freeboard perpendicular. The forward freeboard perpendicular is to be taken at the forwardend of the length L LL and is to coincide with the foreside of the stem on the waterline on which thelength L LL is measuredAP LL: After freeboard perpendicular. The after freeboard perpendicular is to be taken at the aft end of thelength L LL .B : Moulded breadth, in m, defined in [3.4]D : Depth, in m, defined in [3.5]T : Moulded draught, in m, defined in [3.6]T S : Scantling draught, in m, taken equal to the maximum draught (see also Ch 1, Sec 1, [1.1.6])T B : Minimum ballast draught at midship, in m, in normal ballast condition as defined in Ch 4, Sec 7,[2.2.1]T LC: Midship draught, in m, in the considered loading conditionΔ : Moulded displacement, in tonnes, at draught T, in sea water (density ρ = 1.025 t/m 3 )C B: Total block coefficientC B =Δ1.025LBTV: Maximum ahead service speed, in knots, means the greatest speed which the ship is designed tomaintain in service at her deepest seagoing draught at the maximum propeller RPM andcorresponding engine MCR (Maximum Continuous Rating).x, y, z : X, Y and Z co-ordinates, in m, of the calculation point with respect to the reference co-ordinate system.Page 16 July 2008