The patent application relates to a method whereby an acoustic navigation system for marking channels is used for providing safe entry and exit from harbors. The system has a plurality of pairs of acoustic projectors aligned on opposite sides of a channel. Each pair is spaced from corresponding pairs, a predetermined distance along the sides of the channel. A first projector in each pair provides an acoustic source for a period of time. The other projector in the pair provides acoustic sources spaced at predetermined intervals both before and after the signal from the first projector. A vessel equipped with receiving and display equipment determines its own location within the channel from the received acoustic signals.

  • Supplemental Notes:
    • This Government-owned invention available for U.S. licensing and, possibly, for foreign licensing. Copy of application available NTIS.
  • Corporate Authors:

    Department of the Navy

    Washington, DC  United States 
  • Authors:
    • Cobb, A D
  • Publication Date: 1976-9

Media Info

  • Pagination: 15 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00151498
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: PAT-APPL-719-493 Pat. Appl.
  • Files: TRIS
  • Created Date: May 18 1978 12:00AM