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    DR, was: No Lunars Era
    From: Trevor Kenchington
    Date: 2004 Dec 6, 21:16 -0400

    Peter Fogg wrote:
    > I don't know that its all that interesting, but assume 'ded' is an
    > abbreviation for 'deduced' (reckoning) and 'dead' a mis-writing (or hearing)
    > of 'ded' that has become commonly accepted.
    That is commonly suggested (even stated as though it was a confirmed
    truth) but it just doesn't ring true -- to me anyway. As has been argued
    often enough before, abbreviating "deduced" to "ded" would be typical of
    20th century practice but the expression "dead reckoning" goes back much
    further to times when abbreviations and acronyms were far less prevalent.
    My own guess is that DR is termed "dead" because it is not alive,
    meaning that it is not updated through the use of new information on
    position. But for all I know it is an anglicization of a Portuguese
    navigational term.
    Trevor Kenchington
    Trevor J. Kenchington PhD                         Gadus{at}iStar.ca
    Gadus Associates,                                 Office(902) 889-9250
    R.R.#1, Musquodoboit Harbour,                     Fax   (902) 889-9251
    Nova Scotia  B0J 2L0, CANADA                      Home  (902) 889-3555
                         Science Serving the Fisheries

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