Stability Derivatives - Intact Ship
          MTC/ISTABsi(v2000.3) S/N:xxxxxxxx
          Catamaran Hull: FLD Load (11/04/2000)
          ------------------------------------------------------------

          TABLE - 1: Initial Stability

          SEAWATER DENSITY                =        1.025  ton/m^3
          DISPLACEMENT                    =        85.00  ton
          DRAFT (LCF)                     =         1.04  m
          WATERPLANE AREA (ARWL)          =        94.73  m^2
          VERTICAL HYDRO STIFFNESS (TP1C) =         0.97  ton/cm

          VERTICAL C.G (uncorrected)      =         2.00  m
          FREESURFACE MOMENT              =         3.12  m.ton
          CORRECTION FOR FREESURFACE MT.  =         0.04  m
          VERTICAL C.G (corrected)        =         2.04  m

          VERTICAL C.B              (KB)  =         0.55  m

          TRANSV. META CENTER       (KMt) =        23.94  m
          METACENTRIC HEIGHT        (GMt) =        21.90  m
          LONG. META CENTER         (KMl) =        49.77  m
          LONGITUDINAL Cf           (Lcf) =        11.60  m
          LONGITUDINAL Cb           (Lcb) =        11.90  m
          LONGITUDINAL Cg           (Lcg) =        11.90  m
          TRANSVERSE   Cb           (Tcb) =         0.00  m
          TRANSVERSE   Cg           (Tcg) =         0.00  m
          TRIM (+ve by stern)             =         0.09  deg
          MOMENT TO TRIM/DEG              =      1641.49  m.ton/deg
          Heel (+ve by Starboard)         =         0.00  deg
          MOMENT TO HEEL/DEG              =        33.72  m.ton/deg

          DRAFT, FORWARD  (AT FP)         =         1.02  m
          DRAFT, AFT      (AT AP)         =         1.06  m
          ------------------------------------------------------------

          TABLE - 2: Data for deck openings: NOP =  2
           m.....Xopen.....Yopen.....Zopen
           1     3.150     5.790     3.048
           2    18.150     5.950     3.048

          ------------------------------------------------------------

          TABLE - 3:   Righting Arms (GZ) vs. Heel angles (Phi):
                       at constant displacement and trim

                     Phi        GZ      Trim       Lcb     PHIdf
                     deg.       m       deg.       m
          ----------------------------------------------------------
                 -10.000    -3.863     0.095    11.664
                  -5.000    -1.993     0.095    11.667
                   0.000     0.000     0.095    11.667
                   5.000     1.939     0.095    11.665
                  10.000     3.884     0.098    11.667
                  15.000     4.233     0.147    11.663
                  20.000     4.057     0.153    11.669
                  25.000     3.854     0.159    11.676
                  30.000     3.628     0.165    11.684
                  35.000     3.386     0.172    11.694
                  40.000     3.125     0.180    11.708
                  45.000     2.850     0.188    11.714     -**-
                  50.000     2.550     0.188    11.713     -**-
                  55.000     2.231     0.188    11.713     -**-
                  60.000     1.896     0.188    11.715     -**-

          Note: Phidf is down-flooding angle indicated by -**-
 

         Plot of PHI vs. GZ

Back to SOFTWARE