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  1. Electronic navigational aids; loran, radiobeacon, and radarbeacon systems and loran, radio-direction-finder, and radar ship equipment.
    By: United States.
    Edition: Rev. ed., 1949.
    Publication info: Washington,U.S. Govt. Print. Off.,1949.
    Subjects: Loran  Radar  
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  2. Mathematical models for navigation systems [by] Paul D. Thomas.
    By: Thomas, P. D.
    Publication info: Washington,U.S. Naval Oceanographic Office,1965.
    Subjects: Geodesy  Loran  Ready-reckoners  
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