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TRIDENT SSBNs, and '4 Holes in the Superstructure'

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Forum Name: U.S. Submarine Related
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Topic: TRIDENT SSBNs, and '4 Holes in the Superstructure'
Posted By: Curt
Subject: TRIDENT SSBNs, and '4 Holes in the Superstructure'
Date Posted: 25 Dec 2017 at 8:22am
I wonder why EB stopped placing '4 holes' in each side of the superstructure, near the aft end of the sail??
 
Anybody know why the last 4 or 5 ships don't have them?

http://www.navsource.org/archives/08/0873516.jpg" rel="nofollow -



Replies:
Posted By: Curt
Date Posted: 25 Dec 2017 at 9:18am
Here's the 735 from last year - Looks like the holes have been closed -
http://www.postguam.com/news/local/uss-pennsylvania-arrives-in-guam-for-visit/article_3ee62820-9f29-11e6-bc28-ebb6c03b6d98.html" rel="nofollow - http://www.postguam.com/news/local/uss-pennsylvania-arrives-in-guam-for-visit/article_3ee62820-9f29-11e6-bc28-ebb6c03b6d98.html


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Thanks,
Curt


Posted By: Sewer Pipe Snipe
Date Posted: 25 Dec 2017 at 10:36am
Possibly a sonar trace whistle. I know we spent a lot of time near Andros while they figured out if the Lithbro steam valve was a distinct signature. I also heard they were concerned with holes in the hull whistling from water flow through them. Naturally they never told us anything, but we did replace the Lithbro steam bypass valve. Over forty years ago, so I doubt I am giving anything away. 

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Walt,
Had I done everything right throughout my life, the World wouldn't have noticed.


Posted By: FTGC(SS) Lane
Date Posted: 25 Dec 2017 at 11:47am
They definitely aren't AN/BST-1 buoy launch tubes. So the first question should be what are/were they used for.


Posted By: 3boatphil
Date Posted: 25 Dec 2017 at 12:02pm
Storage for Mail Buoy Retrieval Gear? 



Posted By: gerry
Date Posted: 25 Dec 2017 at 12:43pm
5" Countermeasure launchers, if memory serves.

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MT2/SS
USS Simon Bolivar - SSBN 641 (B)
USS Henry M. Jackson - SSBN 730 (B)
USSVI - Wyoming Base


Posted By: SaltiDawg
Date Posted: 26 Dec 2017 at 2:29pm
Originally posted by Sewer Pipe Snipe Sewer Pipe Snipe wrote:

Possibly a sonar trace whistle. I know we spent a lot of time near Andros while they figured out if the Lithbro steam valve was a distinct signature. I also heard they were concerned with holes in the hull whistling from water flow through them. Naturally they never told us anything, but we did replace the Lithbro steam bypass valve. Over forty years ago, so I doubt I am giving anything away. 


The first few SSN-637s had ladder rungs welded on the port side of the sail. Actually could climb down to the deck from the top of the sail.

They "whistled" due to submerged flow noise at speed so we're no longer installed and removed from those early boats of the class.



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