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Calculating tank loads to shift for a given trim
    `Example run file illustrating how to calculate tank loads to shift for desired vessel trim
    `Download the barge geometry file that is used in this example
    proj trim
    content (*) fo
    load(*) .6
    vcg 6
    we 600
    lcg 150
    tcg 0
    \Initial Condition to calculate trimming moment\
    \freeboard: {freebd}
    variable t
    set t = {freebd} times 2
    trim {t}/300
    so dr
    di(*) status
    \Equilibrium Condition - All tanks loaded 60%\
    \freeboard: {freebd}
    \Righting Arm in Trim: {RAT}
    vari lcg1, lcg3
    tank 1.s 1.p
    set lcg1 = {tlcg}
    tank 3.s 3.p
    set lcg3 = {tlcg}
    \Center of 1: {LCG1}
    \Center of 3: {LCG3}
    vari arm wt2move curwt
    set arm = {lcg3} minus {lcg1}
    set wt2move = {displ} times {rat} div {arm}
    \Arm: {arm}
    \Weight to move: {wt2move}
    \Weight to move = Displ X Rat / Arm
    \ {wt2move} = {displ} X {rat} / {arm}
    tank 1.s
    set curwt = {tweight}
    \weight of each tank: {curwt}
    di(*) status
    set wt2move = {wt2move} div 2
    vari wt1, wt3
    set wt1 = {curwt} minus {wt2move}
    set wt3 = {curwt} plus {wt2move}
    \Calculating Weight to shift Aft to arrive at desired Trimmed Condition\
    \weight for forward tanks:{wt1}
    \weight for aft tanks:{wt3}
    \*** Reducing load in tank1.p & .s to {wt1} ***\
    \*** Increasing load in tank3.p & .s to {wt3} ***\
    load (1*) we:{wt1}
    load (3*) we:{wt3}
    di(*) status
    print prev
    report off
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