E-II SSAN SEVERODVINSK SHIPYARD YAGRY ISLAND, USSR (SANITIZED)

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP83T00574R000100040001-1
• Release Decision: RIPPUB
• Original Classification: S
• Document Page Count: 3
• Document Creation Date: December 28, 2016
• Document Release Date: June 10, 2010
• Sequence Number: 1
• Publication Date: July 6, 1982
• Content Type: REPORT

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CONTROL NO. Z-10966/82
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(c) NATIONAL PHOTOGRAPHIC INTERPRETATION CENTER
Attachment to Z-10966/82
NPIC/PEG (7/82)
E-II SSAN
SEVERODVINSK SHIPYARD YAGRY ISLAND, USSR
1. (S/D) SIGNIFICANCE: THE KEEL BLOCK PATTERN ON THE SOUTH SHELF
AT SEVERODVINSK SHIPYARD YAGRY ISLAND, FOLLOWING THE REMOVAL OF
THE E-II NUCLEAR-POWERED AUXILIARY SUBMARINE (SSAN), INDICATES
THAT A NEW NAVIGATION SYSTEM MAY HAVE BEEN INSTALLED IN THIS
HIGHLY MODIFIED, POSSIBLE TEST BED SUBMARINE.
2. (S/D) REMARKS: LIGHT SUPPORT BLOCKS, AS OPPOSED TO FULL-WIDTH
KEEL B OCKS, ARE ON THE SHELF OF THE SHIPLIFTING BASIN SPANNING
A DISTANCE OF ALONG THE HULL AND APPROXIMATELY 25X1
7 METERS ACROSS THE BEAM. THESE BLOCKS ARE IN THE APPROXIMATE
AREA WHERE THE LOWER HULL PROTRUSION WAS IDENTIFIED ON THE
SUBMARINE ON THE LACK OF SUBSTANTIAL SUPPORT IN 25X1
THIS AREA, COMBINED WITH THE REINFORCED BLOCKS FORWARD AND AFT
OF THE AREA, INDICATE THAT A HULL MODIFICATION HAS PROBABLY
TAKEN PLACE. THE PRESENCE OF THE SUPPORT BLOCKS, AND THE LACK
OF CENTERLINE SUPPORTS SUGGEST THAT THE SUBMARINE'S KEEL IN
THIS AREA MAY BE CONCAVE RATHER THAN THE NORMAL
FLAT-TO-SLIGHTLY-CONVEX CONFIGURATION.
(S/D) A CONCAVE SURFACE ON THE KEEL OF THE E-II SSAN COULD
HOUSE A SONAR ARRAY WHICH FUNCTIONS AS A SONAR-BASED MARITIME
NAVIGATION/POSITION FIXING SYSTEM, USED IN CONJUNCTION WITH
CONTOUR MAPS OF THE OCEAN FLOOR. ANOTHER POSSIBLE EXPLANATION
.IS THAT THE SUBMARINE COULD BE USED AS A SUBMERSIBLE TRANSPORT.
3.I COORDINATES 64-35-20N 039-49-14E 25X1
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