Stability Requirements for a Ship without DOA

Ship without DOA

  Ships without DOA are most likely those not having Grain loading Booklet and heeling moment information.

 In such cases

1. The weight of grain loaded cannot exceed 1/3rd dead weight. (This rule does not apply to ships built before 25 May 1980-Existing ships which can load grain without any limitation on weight but must comply with other requirements.

2. All grain surfaces in filled compartments must be restrained by a centre line division extending for the full length of the compartment from the underside of the deck or hatch covers to a distance below the deck line of at least 1/8th of the maximum breadth of the compartments or 2.4 m which ever is greater. Alternately saucering or bundling may be used, except for linseed or other seeds having similar properties.

Alternately saucering or bundling may be used, except for linseed or other seeds having similar properties.

3. All free grain surfaces in partly filled compartments must be trimmed level and secured by over stowing, strapping, or lashing or by wire mesh.

4. All hatch covers of tween decks must be in place & battened

5. Throughout the voyage the GMR should be 0.3m or that given by the formula , which ever is greater

 GMR = L x B x Vd (0.25B – 0.645√(Vd x B)

                            SF x W x 0.0875

L = Total combined length of all full compts.

B = Moulded breadth of vessel

Vd = Calculated average void depth

W = Displacement

6. The Master should demonstrate that the ship complies with these requirements prior to loading.