FORWARD MAINTENANCE FACILITIES FOR Y-CLASS SSBN IN SOVIET NORTHERN AND PACIFIC FLEETS USSR

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78T04741A000100010008-0
• Release Decision: RIPPUB
• Original Classification: T
• Document Page Count: 6
• Document Creation Date: December 28, 2016
• Document Release Date: March 27, 2002
• Sequence Number: 8
• Publication Date: May 1, 1970
• Content Type: REPORT

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PHOTO
INTERPRETATION
NOTE
NATIONAL PHOTOGRAPHIC
INTERPRETATION CENTER
25XIA
FORWARD MAINTENANCE FACILITIES FOR
Y-CLASS SSBN IN SOVIET NORTHERN
AND PACIFIC FLEETS
USSR
Declass Review by NIMA/DOD
GROUP 1. EXCLUDED FROM
AUTOMATIC DOWNGRADING
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MAY 1970
COPY NO-1-1-8
3 PAGES
PIN-033/70
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FORWARD MAINTENANCE FACILITIES FOR Y-CLASS SSBN
IN SOVIET NORTHERN AND PACIFIC FLEETS
Analysis of photography of Soviet naval facilities in the two fleet areas
where the Y-class nuclear-powered ballistic missile submarine (SSBN) is deployed
indicates that at least ten facilities in addition to two construction yards are
capable of providing out-of-water maintenance for units of this class (Figure 1).
-,HELNOPUSHKA
.PALA, CUBA
:ROSTA ~"
MURMANSK
-IsOKANGA
PETROPAV OVS_K
S 'ETS AYA LAVA
KOMSOMOLSK---
7VADIYOST"' AOD.AY
L-1- . M=~s7
EVERODVINSK
Locat ion
Severodvinsk Shipyard 402*
Pala Guba Naval Base and Ship Repair Yard
Chelnopushka Ship Repair Yard
Rosta Naval Base and Ship Repair Yard Sevmorput
Iokanga Naval Base and Ship Repair Yard
Murmansk Ship Repair Yard Glavryb
Komsomolsk Shipyard Amur 199*
Petrovka Naval Base and Shipyard
Vladivostok Naval Base and Shipyard 202
Nakhodka Shipyard
Sovetskaya Gavan Shipyard 1
Petropavlovsk Shipyard and Naval Base Seldevaya
Petropavlovsk Submarine Base and Shipyard Tarya Bay
5X1A
I*Construction Yard for Y-class SSBN M
FIGURE 1. SOVIET NAVAL FACILITIES CAPABLE OF PROVIDING OUT-OF-WATER MAINTENANCE 25X1A
ON Y-CLASS'SSBN
M-0 NG#> L7
POSSIBLE' FORWARD. MAINTENANCE FACILITY
CONSTRUCTION YARD
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The intent of this report is to focus attention on floating drydocks and graving
docks that are estimated to have the capability of providing such service.
Wetdocks and associated repairways at Severodvinsk Shipyard 402 in the
Northern Fleet and Petrovka Shipyard in the Pacific Fleet could furnish out-
of-water service to Y-class SSBN. In addition, Komsomolsk Shipyard Amur 199
has the large transporter dock routinely used for launching the Y-class SSBN
and is fully capable of servicing an operational unit. A second large trans-
porter dock is currently under construction at Komsomolsk.
The fLrst sightin of a Y-class SSBN out of the water at a forward yard was
25X1 D made in late when a unit was in the large floating drydock at
Chelnopushka ip Repair Yard in the Northern Fleet area. Previously, Y-class
units had only been observed out of the water at the construction yard at
Severodvinsk Shipyard 402.
All available KEYHOLE photography of floating drydocks and graving docks
in the Northern and Pacific Fleet areas was examined and the docks measured in
order to determine those capable of handling Y-class units. Such facilities
were found at at least four forward yards in the Northern Fleet area and at five
forward yards in the Pacific Fleet area. An additional yard, in the Northern
Fleet area at Murmansk, has two floating drydocks which may be capable of accom-
modating the Y-class unit, but side wall heights, a critical factor in estimat-
ing capacity, could not be determined from available photography.
Floating :Drydocks
A number of factors must be considered in determining the capacity of a
floating drydock to service a Y-class SSBN. Critical factors which can be de-
termined from overhead photography are floor length, internal width, and wall
height. A fourth determinant, lifting capability, cannot be accurately deter-
mined from aerial photography.
Table 1. Dimensions of Floating Drydocks Capable of Handling Y-Class SSBN
Northern Fleet
Severodvinsk
Chelnopushka
Murmansk
Pacific Fleet
Vladivostok
Wharf 8
Wharf 15
Nakhodka
Sovetskaya Gavan
Petropavlovsk (Seldevaya)
Petropavlovsk (Tarya Bay)
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Y-Class
Capable
Yes
Yes
Marginal
Yes
Yes
Undetermined
Undetermined
Yes
Marginal
Yes
Yes
Yes
Yes
Yes
Marginal
Marginal
*Side wall height could not be determined due to occupancy.
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In cases where a floating drydock is observed holding the weight equivalent
of a Y-class SSBN (for example, an E-II-class nuclear-powered cruise missile sub-
marine, SSGN, and an H-class S wall height assumes primary significance.
The draft of a Y-class SSBN is and keel blocks for it are 25X1 D
25X1 D approximate) high; therefore , a floating drydock must have
25X1 D walls high in order to be considered mar-
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ginally capable of receiving a -c a For the u oses of this report,
docks with wall heights greater than r are considered 2 5X1 D
capable of accommodating a Y-class SSBN. All floating drydocks with minimum
floor lengths of a roximately and internal widths of 25X1 D
I I are included. Measurements o loating drydocks are
summarized in Table j.*
Graving Docks
Factors considered in determining whether or not a graving dock is capable
of handling a Y-class SSBN are length, width, and the depth of water over the
sill of the dock. Graving docks capable of accommodating vessels 130 meters
25X1 D (425 feet) long and wide are included in this study.
Measurements of graving docks are given in Table 2.
*Measurements are accurate to within the sum of plus or minus 1 meter and 1
percent with a 95-percent confidence level.
Table 2. Dimensions of Graving Docks
Capable of Handling Y-class SSBN
Northern Fleet
Rosta
Iokanga
Pacific Fleet
Vladivostok
Dock No 1
Dock No 2
Dock No 3
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