CONDITIONS OF LOADING M.V. TWOSUCH = LIGHTSHIP + ONE BARREL

DISTANCE x WEIGHT = MOMENT                  DISTANCE = MOMENT/DISPLACEMENT

    

(Information supplied courtesy Marine Safety, WA Department for Planning and Infrastructure. Extracts by Ranger HopeŠ 2008).

Item Loaded

 

 

An example load

Tonnes

 

The   weight

V.C.G.

 

Tanks &

capacities

      Vert.

   Moment

Calculation of

T    x   VCG

L.C.G.     +/-

Tanks &

capacities

     Long.

   Moment

Calculation of

T    x    LCG

F.S.N.

 

Summary

of spaces

 

 

 

 One barrel of oil of 1 Tonne is loaded . 

 

  Its CG is at 2 metres above the keel and 10 metres aft of the LCG.

 

  It is considered that as

it is not a full barrel its virtual centre of gravity will be higher, calculated as a moment of 0.65 (Free Surface Numeral)

 

Checking the curves of

limiting KG and LCG quickly show us if the vessel is safely loaded.

 

 

 

1 Tonne

 

 

 

2Mtr

 

 

 

2Mtr/tonne

 

 

 

-10Mtr

 

 

 

-10Mtr/Tonne

 

 

 

0.65

Deadweight

Total the Tonnes added

 

    1

 

 

 

   2

 

 

-10

 

Lightship

From Stability Book

 

148.46

 

3.479

 

516.61

 

-0.65

 

-96

 

-

Displacement

Deadweight + Lightshp

 

149.46

 

3.469

 

518.61

 

-0.7

 

-106

 

0.65

 

New K.G.=  New Vert. Moments =518.61  =3.4699Mtr

                        Displacement           149.46

 

New L.C.G= New Long. Moments = -106

                        Displacement                149.46

 

                                                          = -0.7

F.S.N.=        New FSN. Moments =  0.65    =0.004

                        Displacement           149.46

 

Kgf =              Corrected KG        =               3.474Mtr

 

Has the vessel SAFE or UNSAFE K.G.fluid AND L.C.G in this loading condition?

Show me the Curves of limiting KG & LCG.