Rapid communication with ships at sea is a continually growing need related to the evolutional changes in the marine world. This paper reviews these changes and examines the large part efficient communications must play in ensuring cost effective shipping. The advantages of Selective Calling in achieving these aims are fully explained, particular emphasis being placed on the simplicity of installation and operation and the automatic 24 hour watch-keeping facility it provides. A brief outline is given covering the system of operation in which the sequence of events from the time of origin of a message to receipt of it on board a ship at sea is outlined. The paper concludes with an explanation of the step which Selective Calling provides towards automatic ship borne communications from small craft (2MHz) to large deep sea vessels which in future will use complex satellite communication networks.

  • Supplemental Notes:
    • 45 Conference Papers presented at IMAS 73, London, 4-8 June 1973, organized by the Institute of Marine Engineers. This paper is available only in a set of 5 papers in Subject Group 6: "Navigational Aids, Radio Communications" at $10.00.
  • Corporate Authors:

    Institute of Marine Engineers

    Memorial Building, 76 Mark Lane
    London EC3R 7JN,   England 
  • Authors:
    • Hopkins, D L
  • Publication Date: 1973

Subject/Index Terms

Filing Info

  • Accession Number: 00048476
  • Record Type: Publication
  • Source Agency: Institute of Marine Engineers
  • Files: TRIS
  • Created Date: Nov 14 1973 12:00AM