void ButtonCalcClick(object sender, EventArgs e)
        {
            Classes.Ship_Parameters parameters;
            parameters = new Classes.Ship_Parameters(Convert.ToDouble(textBoxLpp.Text),
                                         		     Convert.ToDouble(textBoxLB.Text),
                                           			 Convert.ToDouble(textBoxBT.Text));
            textBoxB.Text = Convert.ToString(parameters.B);
            textBoxT.Text = Convert.ToString(parameters.T);

            Classes.ReadFile draw = new Classes.ReadFile(file);

            Classes.Bow_coeffitients.Calc_bow_coeffitients(parameters.Lpp,
                                                           draw.dL,
                                                           draw.waterlines,
                                                           ref draw.xf,
                                                           ref draw.xa,
                                                           out Vessel.kb,
                                                           out Vessel.ks);

            Vessel.parameters = parameters;
            Vessel.drawing = draw.drawing;
            Vessel.bends = draw.bends;
            Vessel.waterlines = draw.waterlines;
            Vessel.HydrostaticCalc();
        }
 public Ship_Parameters(Ship_Parameters a)
 {
     this.Lpp = a.Lpp;
     this.B = a.B;
     this.T = a.T;
     this.L_B = a.L_B;
     this.B_T = a.B_T;
 }