﻿ Ship Stability Calculation
 SHIP STABILITY CALCULATION Deadweight Particulars Deadweight Cargo+Consumables+water ballast W Tonne Longitudinal Centre of Gravity - LCG M Vertical Centre of Gravity - VCG M Free Surface Moment - FSM T-M Longitudinal Moment Ml1 = W x LCG Ml1 T-M Vertical Moment Mv1 = W x VCG Mv1 T-M DWT Total DWT = Sum(W) DWT Tonne Longitudinal Centre of Gravity LCG = Sum(Ml) / Sum(W) LCG M Vertical Centre of Gravity VCG = Sum(Mv) / Sum(W) VCG M Lightship Particulars Weight - LS Tonne Longitudinal Centre of Gravity - LCG M Vertical Centre of Gravity - VCG M Longitudinal Moment Ml2 = LS x LCG Ml2 T-M Vertical Moment Mv2 = LS x VCG Mv2 T-M Displacement Particulars Displacement, D D = DWT + Lightship Displ, D Tonne Longitudinal Moment Ml = Ml1 + Ml2 Ml T-M Vertical Moment Mv = Mv1 + Mv2 Mv T-M Free Surface Moment - FSM T-M Longitudinal Centre of Gravity LCG = Ml / D LCG M Vertical Centre of Gravity KG0 = Mv / D KG0 M Free Surface Moment Correction FSC = FSM / D FSC M KG Fluid, KG KG = KG0 + FSC KG M Hydrostatic Properties Draft at LCF - TLcf M Length between Perpendiculars - LBP M Longitudinal Centre of Buoyancy - LCB M Longitudinal Centre of Floatation - LCF M Moment per 1 cm Trim - MCT T-M Transverse Metacentric Height - KMT M Trim (+ve Aft, -ve Fwd) Trim = (LCB - LCG) x D / ( MCT x 100) Trim M Draft Aft Taft = TLcf + LCF x Trim / LBP Taft M Draft Fwd Tfwd = TLcf - (LBP - LCF) x Trim / LBP Tfwd M Draft Midship Tmid = (Taft + Tfwd) /2 Tmid M GM Fluid, GMT GMT = KMT - KG GMT M