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    Re: Loran-C
    From: Jeremy C
    Date: 2009 Mar 19, 07:52 -0700

    Just as the VOR/DME stations were re-purposed for LAAS, so were most
    of the coastal RDF stations converted to DGPS transmitters.  There are
    no US based RDF stations around to my knowledge and I am fairly
    certain that all of the foriegn long-range RDF stations are also shut
    down (QRT).  This is not to say that North Korea or other Communist
    states don't maintain some short range stations (they also still keep
    Morse code watch), but generally RDF went the way of Omega.  Until
    this past year ships needed excemption certificate so that they could
    legally no carry RDF equipment.  Now, you just don't need anything at
    all.  Along a similar line, a couple of years ago the USCG removed all
    RDF questions from their Ocean Merchant Marine exams, which typically
    lags the industry by several years.  The last, and only, time I saw a
    working RDF on a ship was in 1998 on my training ship.  I tried using
    it, but all I could pick up were commercial broadcast stations.
    
    The end result is that outside of pilotage you now have GPS, LORAN-C
    (with its limited range), and Celestial.  If the USCG is right, we may
    be down to GPS and Celestial in the near future.
    
    Jeremy
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