[Milsurplus] OT: Loss of USS Thresher, SSN-593 - One-Half Century Today

[J. Forster]

A contemporary clipping:

http://news.google.com/newspapers?nid=348&dat=19630621&id=gQouAAAAIBAJ&sjid=WDEDAAAAIBAJ&pg=6936,5618903

-John

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> Today it has been 50 years since the USS Thresher sank during
> deep dive testing for sea trials after completing its 1962-1963
> post-shakedown availability at Portsmouth (NH) Naval Shipyard
> (PNSY).  http://en.wikipedia.org/wiki/USS_Thresher_(SSN-593)
>
> Nuclear submarine designs were significantly altered afterwards,
> but existing boats like mine had none of those modifications until
> almost 15 years later.  Many never got the full SUBSAFE package
> although they remained in service carrying Trident I UGM-96 (C4)
> SLBMs until decommissioning in the early and middle 1990s.
>
> One simple thing learned from the loss of Thresher was to not
> conduct initial deep dive testing in water deeper than submarine
> crush depth.  Unfortunately, from PNSY, water deep enough to do
> that testing but not deeper than crush depth takes several days
> of transit time to reach.  The other important result was the
> development of a fast scram recovery procedure for rapid reactor
> restart.  Sometimes the obvious just isn't.
>
> Mike / KK5F
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