LONGITUDE WITHOUT TIME

A new lunar method of determining approximate longitude (and coincidentally latitude) without time is presented , explained and illustrated with an example. The method has been specifically designed for emergency use by the practicing marine celestial navigator who normally uses a chronometer and radio time checks but unexpectedly has neither. The method is simple and does not require measuring the arc between two bodies; simultaneous sights; special tables; prior planning; lengthy or difficult computations; or unusual plotting. It utilizes conventional sextant altitude observations, sight reduction and plotting, and a minimum of additional computation. Accuracy of the method is discussed.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/2083741
• Corporate Authors:

  Institute of Navigation

  815 14th Street, NW
  Washington, DC  United States  20005
• Authors:
  • Luce, J W
• Publication Date: 1977-6

Media Info

• Features: References;
• Pagination: p. 112-115
• Serial:
  • Navigation: journal of the Institute of Navigation
  • Volume: 24
  • Issue Number: 2
  • Publisher: Institute of Navigation
  • ISSN: 0028-1522
  • Serial URL: http://www.ion.org/newsletter/

Subject/Index Terms

• TRT Terms: Celestial navigation; Navigation
• Old TRIS Terms: Navigation techniques
• Subject Areas: Marine Transportation; Operations and Traffic Management;

Filing Info

• Accession Number: 00165469
• Record Type: Publication
• Source Agency: Navigation
• Files: TRIS
• Created Date: Nov 23 1977 12:00AM