1. CHANNEL APPROACHES TO RIGA AND KRONSTADT 2. MINED AREAS OFF THE LATVIAN COAST 3. REMOVAL OF SIGNAL POSITIONS IN THE GULF OF FINLAND

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP82-00457R006400570007-6
• Release Decision: RIPPUB
• Original Classification: S
• Document Page Count: 3
• Document Creation Date: December 14, 2016
• Document Release Date: July 28, 2003
• Sequence Number: 7
• Publication Date: May 7, 1951
• Content Type: REPORT

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Approved FofEkifiliffAE9 Ra9z:. 441f
gP?O gRr; ;AT 0 P4g REPORT
USSR (Baltic Sea area)
1. Channel Approaches to Riga and Kronstadt
2. aned Areas off the Latvian Coast
3. Removal of Signal Positions in the Gulf of Finland
Na(WENCI.S.
(LISTED ULM)
7R006400570007-6
CD NO.
DATE Digrk 7 MY 51
NO. OF PAGES
SUPPLEMENT TO
REPORT NO.
3
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THIS IS UNEVALUATED INFORMATION
The lain Chmnel_aapach,to qiga
1. Ships using the main channel aryproach to Riga (56-53!, 24,-0577,) may rot dftw
more than ten meters of water.. The depth over the Dvina laver bar averages
eight to ten meters.
The following coordinates designate the course of the main charnel;
57-5344611, 21-32-51E
57-50-15U, 21-38-01
At this point the charnel has a width of four cablelengths.
57-47-24A, 21-42-06E
57-44-36N0 21-46-00E
57-41-54N, 21-50-00E
57-39-05N, 21-544ME
57-40-10N, 22-04-01E
57-42-12N, 2243-00E
57-44-12 22-21-457L
At this point the channel has a uld6h of three cablelengths,
57-46-48N, 22-30-00E
57-49-3613, 22-38-42E
At this point the ohannel has a width of to nautical miles.
5746-00A, 22-48-00E
57-15-UV, 23-49-24E
17tm here on up to point 57-04-07, the channel has a width of throe nautical
miles.
57-12-35N, 23-52-04E
57-09-CEN 23-55-23i;
57-12-25, 23-51-32E
57-08-59n, 23-54-50E
57-05-35,:, 23-58-26E
57-04-07N, 24-0C-31:
from here on into the harbor of Rigs:
CONFID
CLASSIFICATION CaLT
INISRE3
FE,
Document No..
No Chang hi Tim. 0
Declass fli '
Class. Chan al Tor C ,
Ruth.: ,itti
Oat.: __/...:
DISTRIBUTION ---T--I
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Approved For Release 2003/08/11: CIA-R
This document is hereby regraded to
0NFIDENTIAL in accordance with the
'c:Otor of 16 October 1978 from the
Drcsctor of Central Intelltence to the
DIPVICIA10513k013640051MOVA
Next Review Date: 2008
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Approved For Release 2003/0
A-RD
CENTRAL INTELLIGENCE AGENCY
The South Channelpproachto
3, The width of the southern channel approach to Riga is three cablelengths and
the depth is six to seven meters.
4. The following coordinates designate the center of the channel:
57-40-00N,
57-19-12K,
57-38-18N,
57-57-24N,
57-39-05N,
From this point on,
21-23-30E
2130-36E
21-39-00E
21-47-36.E
21-54-08E
the channel joins the main channel approach to Riqa,
The Channel 421Ealch to Kronstadt
The following coordinates show the center of the channel approach to Kronstadt
(59-59N, 29-49E)6 A pilot must be taken aboard ship at the Leniu?Ead fireship,
At position No. I (60-04-30N, 28-02-48E), the channel has a width of one
nautical mile' 'Fom here a course must be followed in the direction of the
Lavansaari light at 244 and then in a north west direction from the point
60-02449N, 27-56-58E to position No. 2 (60-02-10N, 27-52-42qRat which the
channel has a width of four cablelengths Fronk here the course followed iv
east of the western -.(spar?)- boom to position No, 3 (59-59-48N, 27-56-30EY
Red light and whistling buoys are placed at a distance of two cablelengths
and. 27 degrees from position No, 3 The channel now follows a course of
104.5 degrees in the direction of the Suisaari beacon,which is directly south
of an N-spar-buoy (59-58-18N, 28-04-37E) The course to be followed then
passes the following points:
59-57-18N,
7-00N ?
59-57-00N:
59-57-00N,
59-57-00F,
60-01-L2N,
28-15-00E
28-17-18E
28-26-00E
28-45-54E
28-54-06E
29-03-24E
At the last point given, the channel has a width of two nautical miles.. Then
on to point 60-01-36N, 29-26-00E, From here on at a course of 107 degrees
into the harbor of Kronstadt. This lasts part of the channel has a width of
one nautical mile,
Lined Areas Off the Latvian Coast
6, A mine field, located in the vicinity of Lepaya (56-3 A 21-00E), is contained
within an area bounded by the following:
in the north to the 56-43,3N parallel,* in the south to the
56-15,5N parallel, in the west to the 2042,2E meridian, and in
the east by the coast,
7. A mine field, located in the vicinity of Riga, is contained within an area
bounded by the following positions:
56-58,9N, 23-50 OE
57-12.5N, 23-50?0E
57-12.5N, 24-06 9E
5749 ON, 24-069E
57-19 ON, 24-17 9E
57-13 ON, 24-17.9E
57-1MN,
'CONFIDENTIAL
Approved For For Release 2003/08/11: CIA-RDP82-00457R006400570007-6
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25X1
Approved For Release 2003/0 ? CIA-RDP82-00457R006400570007-6
CENTRAL INTELLIGENCE AGENCY
Removal of Signal Positions in the Cull: of Finland
The following signal positions (presumably, light buoys) of the Soviet
Navy in the Gulf of Finland were removed
a. At 59-23,2N, 24-213E the signal position known as "Pakri".
h. At 59-18,2N, 23-21.-7E the signal position known. as "Osmussaar'
degrees.
Lossuit-; As reported, given in tenths of minutes,not seconds of
SE
Approved For Release 2003/08/11: CIA-RDP82-00457R006400570007-6