Macduff Ship Design Ltd has been involved with many successful lengthening projects over the years. These have mainly been in the fishing and fish farm sectors where Owners of existing boats have contacted us looking at ways to either increase the carrying potential of their vessels, or facilitate a new method of fishing/catch handling. One recent project for South African Owners involved the lengthening of a stern trawler by 8 metres to allow the creation of a new factory deck and freezer hold.

Macduff Ship Design Ltd has been able to advise these Owners on the suitable size for the lengthened section in terms of meeting ITC Tonnage Requirements (fishing vessels) or specific carrying capacities (work boats).

We have been able to produce specifications and full technical drawings including cutting information for the lengthened vessels which then allows Owners to receive accurate quotations from shipyards. We have also undertaken detailed investigations into the effects of lengthening on trim and stability, as well as fuel consumption and vessel speed.