Defines first-yr ice which grows to approximately 7 feet thickness during Oct-June, and prevails in the Canadian Eastern Arctic (east of Resolute), and multi-yr ice, often up to 100-ft thick and harder as result of desalinization; the latter type prevails in Viscount Melville Sound, M'Clure Strait and in the Beaufort Sea, where it forms pressure ridges under action of wind and currents. The MANHATTAN'S design, her redesign and outfitting for transit of these waters are described, as is her use as a half-scale model of the theoretical icebreaker-tanker required to cope with year-round passage through the Canadian Arctic waters. Her summer 1969 voyage to North Alaska is described, with photographs of ice rubble, ice flow, pancake ice, iceberg, and icebreaker maneuvers. The ice reconnaissance and icebreaker requirements, also the navigational aids, and charting of these waters needed for safe passage of the 26-30 tankers anticipated are briefly discussed. Both authors participated in the 1969 voyage, Rear-Adm Storrs aboard the Canadian icebreaker John A. Macdonald and Capt. Pullen aboard the MANHATTAN as Canadian observer.

  • Corporate Authors:

    Royal Canadian Geographical Society

    488 Wilbrod Street
    Ottawa 2, ONo,   Canada 
  • Authors:
    • Storrs, AHG
    • Pullen, T C
  • Publication Date: 1970

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00037581
  • Record Type: Publication
  • Source Agency: Arctic Institute of North America
  • Files: TRIS
  • Created Date: Nov 10 1973 12:00AM