SUBMARINE PROJECTS AT <SANITIZED>

• Document Type: FOIA
• Collection: CIA Analysis of the Soviet Navy
• Document Number (FOIA) /ESDN (CREST): 0005508948
• Release Decision: RIPPUB
• Original Classification: U
• Document Page Count: 4
• Document Creation Date: June 19, 2017
• Document Release Date: June 19, 2017
• Case Number: SC-2007-00006
• Publication Date: December 10, 1984

Approved for Release: 2017/06/16 C05508948
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MEMORANDUM FOR: Director of Central Intelligence
SUBJECT Submarine Projects at
APPROVED FOR RELEASE
CIA HISTORICAL RELEASE
PROGRAM
JUNE 2017
AR 70-14
1 0 DEC 1984
1. This report contains informatAnn_omim_h_P?r?of Soviet
submarine projects constructed at including
code names, project numbers, and production and dimensional data.
There is also a brief description of how anechoic coatings are
applied to a submarine's hull.
2. Because the source of this report is extremely sensitive,
this document should be handled on a strict need-to-know basis
within recipient agencies.
eorge
Deputy D ector for Operations
CAR
A
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Distribution:
Director
Director of Central Intelligence
Director of Intelligence and Research
Department of State
Director, Defense Intelligence Agency
Director of Naval Intelligence
Department of the Navy
Director, National Security Agency
Deputy Director of Central Intelligence
Deputy Director for Intelligence
Deputy Director for Science and Technology
Director of Soviet Analysis
Director of Imagery Analysis
TS #848263
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Approved for Release: 2017/06/16 C05508948
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COUNTRY USSR
DATE OF
INFO. October 1984
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Intelligence Information Special Report
SUBJECT
Submarine Projects at
DATE 1 0 DEC 1984
SOURCE A Soviet
1. The first titanium submarine from the new BARRACUDA
project was launched in the summer of 1983.
2. The following submarine construction projects were among
those handled by the Project 670 SKAT,
Project 670M CHAYKA, Project 641B SOM, Project RT SYEMGA, and
Project 877 VARSHAVYANKA.
a. Project 670 [CHARLIE-I-class SSGN], code name SKAT
IRAY]--Construction began circa 1960 and ended in 1972 with
a total of 11 hulls. The main hull has a diameter of nine
meters, a hull thickness of 25-40 millimeters, a distance
between frames of 50-60 centimeters and a length of 75
meters. AK-29 steel is used in the hull. The SKAT has a
nuclear propulsion system and two supplementary water
propellers. Construction of a modernized version of the
submarine began in 1969.
b. Project 670M [CHARLIE-II-class SSCN], code name
CHAYKA [SEAGULL1--The CHAYKA is distinguished from SKAT
by its larger dimensions. Its pressure hull length is 80
meters and the submarine is larger by one compartment than
the SKAT. Construction ended in 1980.
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c. Project 641B [TANGO-class SS], code name SON
[CATFISH]--Construction began in 1968 and ended in 1980
with a total of 12 hulls. The main hull has a diameter
of seven to eight meters, a hull thickness of 25-30 milli-
meters, a distance between frames of 50 centimeters, and
a length of 85 meters. AK-25 steel is used in the hull.
This class of submarine has a diesel propulsion system.
d. Project RT [VICTOR-II-class SSN], code name SYEMGA
[SALMON]--Construction began in 1969 and ended around 1973
with a total production of three or four hulls. The main
hull has a diameter of ten meters, a hull thickness of 30-
40 millimeters, a distance between frames of 60 centimeters
and a length of 110 meters. AK-29 steel is used in the hull
and the propulsion system is nuclear.
e. Project 877 [KILO-class SS], code name VARSHAVYANKA
1WARSAVITE1--This project has been under construction since
1981. One submarine was launched on 2 March 1984 and the
launching of the second hull is expected to occur in late
October 1984. The main hull has a diameter of eight meters,
a hull thickness of 24-30 millimeters, a distance between
frames of 60 centimeters and a length of 85 meters. AK-25
steel is used in the hull. The VARSHAVYANKA has a diesel
propulsion system. Comment: The second KILO
unit launched from was detected on
18 Novem 4 at It probably
departed late October to reach the Black Sea by mid-
November
3. Projects 670, 670M, 641B, SYEMGA and 877 have a rubber
coating. In areas where there is considerable noise, the hull
is coated with thicker rubber, up to 70 millimeters thick. Before
the coating is applied to the hull, the metal is cleaned until it
shines. It is then covered with mastic which is followed by the
rubber coating. The rubber is compressed by special cylinders
and held under pressure for 72-96 hours. Afterward the seams and
grooves on the coating are sealed with liquid rubber. To improve
anechoic properties, the coating is made porous.
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