Abstract: A system and method for fitting a new inner hull internally over an existing single hull to form a rebuilt double hull vessel. The topside decking and internal vessel structure of the existing single hull vessel is cut and removed and the inner hull structure is inserted within a volume defined by the original hull. The original hull defines an exterior (outer hull) of the rebuilt double hull vessel and the inner hull defines an interior cargo carrying volume and forms a secondary boundary in the event that the outer hull is penetrated. A face bar and filler plate combination is used to connect the new inner hull to the existing outer hull and accounts for dimensional tolerances between the two structures. In addition, detailed ship surveys are conducted to measure the vessel structure and advanced, computerized drafting techniques are employed to improve the fit-up of the new inner hull structure with the existing outer hull structure.

Abstract: An existing single hull vessel is rebuilt to provide a double hull vessel by cutting and removing the topside decking and internal vessel structure of the single hull vessel and inserting an inner hull structure within a volume defined by the original hull. The original hull defines an exterior (outer hull) of the rebuilt double hull vessel and the inner hull defines an interior cargo carrying volume and forms a boundary in the event that the outer hull is penetrated. In addition, a trunk structure, raised deck, and lower bulkhead portions may be used to prevent the loss of cargo carrying capacity due to the new double hull. The double hull covers at least the length of the cargo carrying section of the vessel along the bottom and sides of the cargo section.

Abstract: An existing single hull vessel is rebuilt to provide a double hull vessel by cutting and removing the topside decking and internal vessel structure of the single hull vessel and inserting an inner hull structure within a volume defined by the original hull. The original hull defines an exterior (outer hull) of the rebuilt double hull vessel and the inner hull defines an interior cargo carrying volume and forms a boundary in the event that the outer hull is penetrated. In addition, a trunk structure, raised deck, and lower bulkhead portions may be used to prevent the loss of cargo carrying capacity due to the new double hull. The double hull covers at least the length of the cargo carrying section of the vessel along the bottom and sides of the cargo section.