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Owners contemplating refits or conversions to existing vessels can utilise the extensive experience that Macduff Ship Design Ltd has gained working on numerous projects.

Macduff Ship Design has worked with all of the major classification societies producing the necessary documentation for design approval on a variety of conversion projects. The company can provide drawings, specifications, structural calculations and stability calculations for a wide range of projects such as:


Macduff Ship Design has been involved in the re-engining of many vessels producing evaluations between different powering proposals, specifications for the work for quotation purposes and structural drawings.

  Change of use of vessel (i.e. trawler to a tug or ferry to a workboat)

Macduff Ship Design has produced specifications and technical drawings for both the evaluation of proposed conversions and full conversion packages including: Project Management, Stability and Profiled Kits, for a wide variety of conversions from trawler - yacht to ferry - survey vessel.

  Fitting of new deck machinery

Macduff Ship Design has been involved in the fitting of new deck machinery to a wide variety of vessels. This work has mainly been applied to offshore and fishing vessels but has also been carried out on ferries, workboats and aids to navigation service vessels. The work ranges from the fitting of small items of deck machinery to whole new deck arrangements including new machinery and accommodation areas.

  Fitting of additional accommodation blocks for stand-by vessel

Macduff Ship Design has been involved in the fitting of additional accommodation blocks to offshore vessels both as survivor modules and as additional crew and passenger accommodation. These projects have involved the fitting of bought in accommodation modules to the vessel or the complete design of new accommodation areas including structural and layout drawings.

  New casing and/ or wheelhouse

Macduff Ship Design has produced drawing for additional and new casing structures and wheelhouses to vessels which improve crew comfort and visibility from the wheelhouse and hence crew safety. This would normally involve a full drawing package of structural and layout drawings, specification and project management. It may also involve the production of profiled kits which help to reduce down time, as vessels can continue working until the new structures are fabricated and ready to be fitted.

  Retro fitting of new ship structure

Macduff Ship Design has fitted new structures to vessels such as: bulbous bows, bilge keels, skegs, ballast keels and stability tanks to aid vessels performance, sea keeping ability and stability.

We can obtain quotations from contractors on behalf of an owner using a detailed specification thereby ensuring that the work will be carried out to the owner's full satisfaction with no 'hidden' extras and upon contract signing carry out full project management to ensure the job is completed to the owners requirements.

The images below show the Highland Spirit before and after conversion, with the offshore access system (OAS) and additional accommodation modules fitted.

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Highland Spirit before additional structure Photograph Highland spirit after additional structure Photograph
The images below show the proposed conversion of an 80m passenger & vehicle ferry into a survey vessel.

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Ferry before conversion Profile Ferry after conversion to Survey vessel Profile
The images below show the before and after profile of a decommissioned 60' fishing boat that is being converted into a luxury yacht. Macduff Ship Design drew up the plans for the conversion and have also profiled and kitted the new aluminium superstructure.

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60 ft fishing boat Before Profile 60 ft fishing boat convered to luxury yacht Profile