GZ Curves Revised

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GZ CurvesLet G move G1, Then it can be seen with a shift of CARGO, the Vessel will Capsize Earlier

GZ(m) Initial GZ

GZ Max GZ Max

Vessel with the shift of cargo

GM

Angle of vanishing stability < v/s

Heel Dec RANGE 57.3

Summary: 1.GM does not change 2. Deck age does not change 3.At 0 deg GZ does not change 4.Vsl as a list /GZ =0 5.GZ max is Reduced 6.Angle V/S Reduced 7.Range Reduced 8.Area under Curve Reduced Remarks: a) Shift of Bulk Cargo

m1 g g Cargo G

B 1) GM Reduced 2) Deck age Immersion not Changed 3) GZ at 0 deg is negative

G B

G1

G

G1 B B GZ=positive Reduced

GZ Negative (Reduced)

GZ=0

Let G move to G1 then it can be seen on the vessel that the shift of the Bulk cargo will Cap size earlier Below Graph illustrates that when the bulk cargo is shifted earlier the Vessel will capsize

GZ(m)

GZ(max)

Initial GZ

GM GM Deck age 57.5

Angle of vanishing stability

heel

RANGE Summary: 1) GM is reduced 2) Deck age remains the same 3) At 0 GZ is Negative 4) Vessel has a list GZ=0 5) GZ max reduced 6) Angle of vanishing stability reduced 7) Range Reduced 8) Area Remarks:

Non Symentrical Icing G1 ice

M

G W/L2 W/L1 B Summary: 1) GM reduced 2) Angle of deck age immersion Reduced 3) GZ is Negative

Lets move G to G1 then it can be seen that the Vessel with a Non symmetrical icing and heavy lift will capsize earlier

GZ(m) Angle of vanishing stability

Initial GZ GZ max GM

Deck ageSummary: 1) GM is reduced 2) Deck age is reduced 3) At 0 GZ is negative 4) Vessel has a list GZ=0

57.3

5) GZ max reduced 6) Angle of vanishing stability is reduced 7) Range Reduced 8) Area Reduced

Bilging of a side compartment M

G

W/L2 W/L1

Ship side Hole B Summary: 1) Assume GM is reduced 2) Deck age is reduced 3) GZ is negative

GZ(m)

Initial GZ GZ max