| Home | Mailing Lists | Bookstore | Weather | Tide Predictions | Bowditch |

Re: T&T: Re: Another reason to hang onto your LORAN

From: Robert Wiseman (no email)
Date: Fri Dec 17 2004 - 10:06:23 EST

  • Next message: Richard Sponholz: "T&T: RE: RE: WiFi with external antenna"

    I'm curious, does any body believe that by turning on selective availability
    (which means that the accuracy is diminished to about 200'/300') that the
    plane, missile or what ever isn't going to be close enough to it's target to
    do damage?

    ----- Original Message -----
      From: Mike Maurice<mailto:>
      To:
    <mailto:trawlers-and-trawlering at list
    s.samurai.com>
      Sent: Thursday, December 16, 2004 4:32 PM
      Subject: Re: T&T: Re: Another reason to hang onto your LORAN

      <mailto:>
      At 03:26 PM 12/16/04 -0500, you wrote:
    >What makes you think the Loran signal will not be screwed up, too.
    >jdl

      This comment represents a major misunderstanding of the issue. Loran sets
      require a fairly large antenna, GPS does not. Loran is not nearly as
      precise as GPS. The repeatability of Loran is near as good, but the
      absolute precision is not nearly as good. The concern with GPS is not that
      it could be used to target a ballistic missile, but that it could be used
      for a cruise missile, or for that matter an airplane, guided to its target
      by a human pilot, I suppose. In short GPS will fit onto most any vehicle,
      whereas Loran requires a big antenna and is not nearly as accurate. The
      Loran will make a precise fix to the same location, repeatably, using the
      same equipment, but that location is not as close to the absolute location
      as GPS will come.

      GPS can be turned off selectively in an area. What the size of that area, I
      know not and I am not sure the information is not classified.
      Considering the issues involved, it would appear that the chances of GPS
      being turned off for any significant length of time over a wide area would
      seem to be pretty unlikely. In any event Loran was never part of this
      concern, at least not acknowledged at any public level.

      In any event, if any of these assumptions were to be changed, I would
      expect the public would be informed, pretty quickly.

      Mike

      Capt. Mike Maurice
      Tualatin(Portland), Oregon
      _______________________________________________
      http://lists.samurai.com/mailman/listinfo/trawlers-and-trawlering
    sts.samurai.com/mailman/listinfo/trawlers-and-trawlering>

      To Unsubscribe send email to
    <mailto:trawlers-and-trawler
    >
      Include the word Unsubscribe (and nothing else) in the subject or body of
    the message.

      Trawlers and Trawlering, T and T, TrawlersandTrawlering, and TandT are
    trademarks of Water World International. Unauthorized use is prohibited.
    _______________________________________________
    http://lists.samurai.com/mailman/listinfo/trawlers-and-trawlering

    To Unsubscribe send email to
    Include the word Unsubscribe (and nothing else) in the subject or body of the message.

    Trawlers and Trawlering, T and T, TrawlersandTrawlering, and TandT are trademarks of Water World International. Unauthorized use is prohibited.

  • Next message: Richard Sponholz: "T&T: RE: RE: WiFi with external antenna"



    | Home | Mailing Lists | Bookstore | Weather | Tide Predictions | Bowditch | Trawlerworld |