[PSUBS-MAILIST] Re: Gliding subs

[Michael B Holt <tlohm@juno.com>]

On Tue, 28 Sep 2004 21:31:08 +1200 MARCO <marco@zeeman.co.nz> writes:
>
>But Leonard's work is hardly mundane. She has developed mechanisms to
>control 5-foot-long unmanned submarines designed to ''glide'' undersea 
>for months at a time, collecting data on water temperature, salt 
>concentrations and other factors affecting undersea life.
>
>The submersibles have no propellants, only pumps to take on or release 
>water for ballast which, combined with ''little wings'' and the ability
to 
>shift their weight, allow them to pitch up or down and side to side,
gliding
>through the currents, and occasionally surfacing to take direction  
>from a satellite signal.


Hmmm ....  This has been discussed since at least 1962.  



Mike

.


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