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    Re: US. Navy fix accuracy and Interval.
    From: William Hawes
    Date: 2013 Mar 29, 18:27 -0700

    Lu and all,

    Here is cleaner link to the Discrete Echo Sounder '.pdf' as well as the '.pdf' itself.

    http://www.thales-safare.com/pdf/NUSS-2F%20MK2%20%20Oct2012L.pdf

    wmh
    __________________________original message_________________
    Re: US. Navy fix accuracy and Interval.
    From: William Hawes
    Date: 2013 Mar 29, 10:31 -0700
    --------------------------------------------------------------------------------
    Lu,

    You are quite correct about subs not wanting to operate active sonar (side scan or otherwise). However if you wanted to operate an echo sounder and you didn't want anyone to know that you were operating an echo sounder, then you might look into the use of a discrete echo sounder. Check out:

    http://www.thales-safare.com/pdf/NUSS-2F%20MK2%20%20Oct2012L.pdf?PHPSESSID=99e04badfdf631a71b9ae52b276d84c2

    Trust this answers your question.

    wmh

    _______________-original message________________

    Re: US. Navy fix accuracy and Interval.
    From: Lu Abel
    Date: 2013 Mar 28, 08:57 -0700
    --------------------------------------------------------------------------------
    William:
    Without asking you to reveal anything classified, how can one survey the bottom without sonar? And I thought subs didn't run active sonar because that would reveal their position.
    Lu

    On 3/26/2013 3:43 PM, William Hawes wrote:
    --------------------------------------------------------------------------------
    Lu,

    I'm sure you can appreciate that even after all these many years since I left the submarinne service, I can't give any details. Suffice it to say that submaines carry "classified" Bottom Contour Charts that allow navigation technniques not available to the general public. These special submarine chart folios were not even carried, at the time (mid 70's), on naval sufface ships.

    Guess what submarines are doing when they are not firing missiles - they are bottom surveying,

    wmh
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