A 30,000-dwt Great Lakes bulk carrier being built by Collingwood Shipyards for Canada Steamship Lines has a new type of bow, developed by the builders, for breaking late- and early-season ice in the Lakes and St. Lawrence Seaway. It had been found that the bluff bows of previous ships tended to push the ice ahead in the Seaway locks, so making an extra locking-cycle necessary. The new box is V-shaped almost up to the load waterline, and then slopes back slightly to enable it to break the ice from underneath; above the sloping section, the bow is flared to keep the deck dry and free from ice-forming spray in heavy weather. The bow, which should help to penetrate ice up to several inches thick, is of the same 26-mm mild steel as the bows of other Lakers, but more attention has been paid to panel and local strength. The ship, a self-unloader, has her hold lines with high-density polyethylene to keep her usual cargo of western Canadian coal free-flowing; cargo reclaimers, running above the conveyer belts, are provided to disturb the cargo and ensure positive feed. The new bow, in a refined form for higher speed, is also to be fitted to a similar ship intended for the Nova Scotia run. Order from BSRA as No. 47,077.

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  • Corporate Authors:

    Engineering, Chemical and Marine Press, Limited

    33-39 Bowling Green Lane
    London EC1P 1AH,   England 
  • Publication Date: 1977-8

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Filing Info

  • Accession Number: 00168258
  • Record Type: Publication
  • Source Agency: British Ship Research Association
  • Files: TRIS
  • Created Date: Jan 30 1978 12:00AM