Re: [OT] Navy releases photos of U.S.S. San Francisco
From: Derek Lyons (fairwater_at_gmail.com)
Date: 01/31/05
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Date: Mon, 31 Jan 2005 06:53:09 GMT
henry@spsystems.net (Henry Spencer) wrote:
>>In the book "The Hunt For Red October" they mention a "mass detector"- a
>>device that picks up gravitational anomalies near the sub and allows
>>navigation around subsurface obstacles without the use of sonar.
>
>Not quite -- the device in the book detects small changes in the local
>gravitational field, which can be compared against a gravity *map* to
>navigate accurately in a *mapped* *area* without sonar. It's a navigation
>system, not a way of sensing what's ahead; it wouldn't help you avoid an
>unmapped obstacle.
>
>(Such devices really do exist, but whether they are useful and practical
>for submarine navigation is not obvious.)
They were originally baselined into the D5 navigation system, but
after a decade plus of work, they were abandoned.
D.
-- Touch-twice life. Eat. Drink. Laugh. -Resolved: To be more temperate in my postings. Oct 5th, 2004 JDL
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