The Author (of Eken & Doherty Pty Ltd, Australia) first describes his company's policies and activities in designing small ships during the ten years following its inception in 1954. When the demand for offshore supply vessels reached Australia in 1965, the company had already established a procedure, adapted from World War II practices by which potential builders outside the Government-subsidised shipbuilding industry could build small ships economically. The company had gained considerable experience in refining developable hull-forms, and from the outset adopted 1/10-scale lofting. This approach to the design and building of small ships is discussed. Offshore supply boats designed by the company for the Australian market since 1966 are then described and their design and its problems are examined. The earlier classes of boat were the 2 x 850-bhp Austral Classes 1 and 2, the 2 x 2,150-bhp Sedco Class, and the 2 x 1,600-bhp Lorna Class. The later classes, the 190-ft (length o.a.) 4 x 1,000-shp (metric) twin-screw Sarah Class (about 1971) and the 198 6-ft, 4 x 1,600-shp, twin-screw Super Sarah Class (about 1975), and the evolution of their design, are considered in more detail than the earlier ones, but the paper includes comprehensive lists of principal particulars of them all, together with general-arrangement drawings of all except the Lorna Class. Fuel consumption curves from the trials of a Sarah Class ship, a lines plan of this class, and some trials data for a Super Sarah Class ship are also included. All the classes mentioned, except Austral Class 1, have towing ability, and the two later classes have anchor-handling facilities. Among the many aspects discussed is the practicability of c.p. propellers under Australian conditions. Order from BSRA as No. 50,616.

  • Supplemental Notes:
    • Third International Offshore Craft Conference, London, Sept. 1978, Day 2, Paper No. 8.
  • Corporate Authors:

    International Offshore Craft Conference (3rd)

    London,   England 
  • Authors:
    • Doherty, M J
  • Publication Date: 1978

Media Info

  • Pagination: 12 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00196029
  • Record Type: Publication
  • Source Agency: British Ship Research Association
  • Files: TRIS
  • Created Date: Jul 31 1979 12:00AM