The navigation on a Decca homing-lane with a tanker of 250,000 tons was simulated: the Decca-navigator system being the only external navigational aid. The experimental variables were: forward velocity (6, 8 or 10 knots), presence or absence of skywave, and the resolution of the Decca-lattice (one lane was 825 m or 165 m wide). Six pilots carried out a specified manoeuvre three times in all conditions, the results show that it is difficult to follow one Decca-line, when the ship has started on an oscillatory track. The task becomes easier as speed increases. Skywave has an adverse influence on the performance, whereas decrease of the line-width has no facilitating influence at all. The marked individual differences suggest that training is often inadequate.

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  • Corporate Authors:

    Purdue University/Indiana Department of Transportation JHRP

    Purdue University, School of Civil Engineering
    West Lafayette, IN  United States  47907-1284
  • Authors:
    • Wagenaar, W A
  • Publication Date: 1972-9

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Filing Info

  • Accession Number: 00046602
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: Oct 18 1973 12:00AM