## Final KG (Derrett Stability)

Final KG (Derrett Stability) A ship of 3500 tonnes light displacement and light KG 6.4 m has to load 9600 tonnes of cargo. The KG of the lower hold is 4.5 m, and that of the tween deck is 9 m. The load KM is 6.2 m and, when loading is completed, the righting moment … Read more

## Draft Density TPC FWA (Derrett Stability)

Group weights, water draft, air draft and density (Derrett Stability) A ship’s draft is 6.40 meters forward and 6.60 meters aft. FWA = 180 mm. The density of the dock water is 1010 kg per cum. If the load mean draft in salt water is 6.7 meters, find the final drafts F and A in … Read more

## Bilging and Permeability (Derrett Stability)

Bilging and Permeability (Derrett Stability) A box-shaped vessel 40 m long, 6 m beam, is floating at a draft of 2 m F and A. She has an amidships compartment 10 m long which is empty. If the original GM was 0.6 m, find the new GM if this compartment is bilged. KM = KB … Read more

## Angle of Heel or List (Derrett Stability)

Angle of Heel or List (Derrett Stability) A ship is just about to lift a weight from a jetty and place it on board. Using the data given below, calculate the angle of the heel after the weight has just been lifted from this jetty. The weight to be lifted is 140 t with an … Read more

## Trim or Longitudinal Stability (Derrett Stability)

Trim or Longitudinal Stability A ship is floating in salt water at drafts of 6.7 m F and 7.3 m A. MCT 1 cm 250 tonnes m. TPC 10 tonnes. The length of the ship is 120 meters. The center of flotation is amidships; 220 tonnes of cargo is then discharged from a position 24 … Read more