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    R: Role of CN at sea
    From: Federico Rossi
    Date: 2004 Oct 13, 12:44 +0200

    Just a few words on the topic.
    The situation described by George, as he himself stated, is not likely
    to repeat itself since now the coverage of GPS satellite network is
    complete (even though a boat can still experience electric and
    electronic failures), but the example in my opinion highlights a key
    point of the whole discussion, i.e. the role of dead reckoning.
    Celestial navigation wasn't "killed" by GPS, in fact many other systems
    like LORAN were developed prior to GPS that (without reaching GPS
    accuracy) were meant to assist navigators providing them with a
    countinously checked position and freeing them from the quirks of the
    The point is that GPS navigators (I'm talking about boats and not
    cruisers) sometimes seem they have forgotten DR principles, they regard
    the practice of estimating and checking their position with the well
    known methods of coastal navigation (and why not, of celestial
    navigation) as a waste of time, thus losing the opportunity to interpret
    the effect of the currents, of the wind, the behaviour of the boat, and
    to forecast the corrections needed to follow a certain route (and
    eventually to cross check their electronic instrumentation).
    But maybe I'm only fond of celnav and lovers are rarely impartial, you

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