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2 results

  • Great Circle Navigation with Vectorial Methods

  • Vincenzo Nastro, Urbano Tancredi
  • Journal:
    The Journal of Navigation / Volume 63 / Issue 3 / July 2010
    Published online by Cambridge University Press:
    28 May 2010, pp. 557-563
    Print publication:
    July 2010

  • The present paper is concerned with the solution of a series of practical problems relevant to great circle navigation, including the determination of the true course at any point on the great circle route and the determination of the lateral deviation from a desired great circle route. Intersection between two great circles or between a great circle and a parallel is also analyzed. These problems are approached by means of vector analysis, which yields solutions in a very compact form that can be computed numerically in a very straightforward manner. This approach is thus particularly appealing for performing computer-aided great circle navigation.

  • The Transformation of Hyperbolic to Geographical Coordinates by a Gradient Method

  • Vincenzo Nastro
  • Journal:
    The Journal of Navigation / Volume 28 / Issue 3 / July 1975
    Published online by Cambridge University Press:
    23 November 2009, pp. 300-305
    Print publication:
    July 1975

  • Position fixing with the Omega hyperbolic navigation system requires the use of charts or tables unless the receiver itself is able to display the geographical coordinates directly. Plotting position lines on Omega charts is a simple operation but owing to their small scale (1 : 2, 187, 400 for the Mediterranean area) it is impossible to obtain a satisfactory accuracy of fix, while the use of Omega tables becomes particularly laborious when frequent fixes are required.