THE PRESIDENT'S DAILY BRIEF 17 APRIL 1971

• Document Type: FOIA
• Collection: President's Daily Brief 1969-1977
• Document Number (FOIA) /ESDN (CREST): 0005992592
• Release Decision: RIPPUB
• Original Classification: T
• Document Page Count: 13
• Document Creation Date: August 14, 2016
• Document Release Date: August 24, 2016
• Publication Date: April 17, 1971

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The President's Daily Brief
17 April 1971,
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THE PRESIDENT'S DAILY BRIEF
17 April 1971
PRINCIPAL DEVELOPMENTS
The Soviets are constructing 31 or more new sites
for the large new type silos at their missile com-
plexes. (Page 1)
The Soviets also have begun work on a large ABM
radar at Moscow oriented toward China. (Page 2)
Semenov has returned to Vienna but shows no sign of
flexibility on SALT. (Page 3)'
On Page 4
South Vietna0
(Page 5)
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(Page 6) 50kL
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Soviet Deployment of New Type ICBM Silos
trAt .
Derazhnya ?
(.9
Moscow. .
? ? ?
Perv omaysk
?
?
Dombarovskiye
?
?
? ?
ejpKartaly
?
.
lmeni 9asteilo ?4 ?
Tyura6rn 9
Missile Test
Zhangiztobe
Center
. 0 Location Of new 'Construction's"
? Missile complex where ICBMs
are deployed
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USSR
Initial analysis of the latest satellite pho-
tography shows construction of 31 new sites for the
large ?new type silos at Soviet missile complexes,
and probably two more under construction. These
new sites bring the number detected to date to 46.
Thirty of the latest identified are at the Pervomaysk
complex, where the SS-5 IRBM and the SS-11 ICBM have
been positioned and where the new type silos had.not
been seen previously. Two more sites were detected
at the Derazhnya MRBM complex, bringing to ten the
number Under construction there; one was seen at the
Dombarovskiy SS-9 complex, which now has two con-
firmed sites.
Earlier photographic coverage had disclosed
three sites at the Imeni Gastello SS-9
complex, one likely site at the Zhangiztobe
SS-9 complex, and a number of others which
have been identified with various degrees
of confidence, including four at the Kar-
taly SS-9 complex. A group of these large
new silos is also being built at the
Tyuratam Missile Test Center but was not
seen on the latest photography.
The new sites at Pervomaysk, like those
at Derazhnya, are located in areas separate
from the SS-11's positioned there. All
have been started since August and are in
an early stage of construction. The loca-
tion and arrangement of the new sites at
Pervomaysk suggest that there are at least
three groups of silos under construction.
There may be as many as ten silos per
group at Pervomaysk and Derazhnya.
The type of missile to be deployed at these
new sites is still not clear. The silos
may be for a large new and as yet untested
ICBM or for a modified version of the SS-9,
or may be meant to provide additional
hardening for existing versions of the
SS-9.
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Soviets Expand ABM Radar Coverage
Present radar coverage
Coverage of radars under
construction
(present standard sector)
Probable sector of coverage
of new radar
551331. 4-/1 CIA
New Construction in Moscow ABM Defenses
0
o
Dog House
Acquisition &
Tracking Radar,.
Moscow
?
Chekhov
Acquisition &
I'Tracking Radar
LAUNCH COMPLEXES
o Operational
o Suspended
----New Construction
0 2,5
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Nautical Miles
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USSR
The latest satellite photography indicates that
the Soviets have begun work on a second large ABM
radar at the site of the Chekhov acquisition and
tracking radar near Moscow. The new clearing and
grading was started no earlier than last September.
The radar will be oriented toward China.
The new radar, when completed, will close
one of the principal gaps in the coverage
of the three other large acquisition and
tracking radars at Moscow--the northwest
and southeast faces of the Dog House and
the westward-oriented radar being built
at Chekhov. No construction of a similar
radar to provide coverage of the Mediter-
ranean has been detected.
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SALT
Minister Semenov has returned to Vienna; but
the tack he has taken shows no sign of any new flex-
ibility in the Soviet approach to the talks. When
he got back he asked Ambassador Smith to the Soviet
Embassy and treated him to a two-hour. exposition
which amounted to a rehash of Moscow's case for a.
separate, NCA-level ABM agreement. Semenov reit-
erated the Russian position that the US stand on
forward based systems blocks movement toward a
broader accord, and argued that the talks should
home in on ABM limits now, putting off consideration
of offensive weapons until "later."
At yesterday's plenary, Semenov elaborated on
the Soviet draft treaty on ABM and Smith called on
the Soviets to address the question of numerical
limits on strategic offensive forces. No plenary
meeting was scheduled for next week. Instead, the
two sides agreed to hold a "mini-plenary" (a smaller
and less formal session) on ABMs next Wednesday.
Other working-group meetings of officials from both
sides will be devoted to measures aimed at-reducing
the danger of accidental nuclear war.
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SOUTH VIETNAM
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Top Secret
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