The design and building processes of new ships are becoming an increasingly exact science, whereas a refit requires more experience and improvisation, of course based on a healthy quantity of professional knowledge. The course of a refit mainly depends on the scope of the refit and the location where it is performed. The scope can vary from a small adaptation to a complete refit, consisting for example, lengthening the hull and superstructure decks or a completely new engine room.
The refit process itself generally starts with a feasibility study, a new General Arrangement and, if desired, outline sketches and renderings. A report is composed with the consequences of the refit including an overview of all necessary activities (engineering and workshop). This provides a solid starting point for a quotation for the complete refit.
The next phase starts with fairing the new lines and determining the new (hull) shape, followed by making detail and class approval drawings for construction, outfitting and technical systems. This phase also includes the making of all required class and strength calculations.
If desirable we can supply a complete set of cutting files, including nestings and product information of plates and profiles. To accelerate the refit process even more, one can choose to have this ‘package’ translated into an actual metal building kit, a so-called 3D puzzle, so the yard can have the new section(s) ready before the ship arrives at the yard.
To guarantee a good and seamless connection to the existing shape and construction, we always survey the vessel first using common sense and 3D laser equipment. After the refit an inclination test and sea trials are performed as input for producing all the required documents and approvals.