SELECTED MAJOR COMMUNICATIONS FACILITIES NORTH VIETNAM

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78B04560A006500010013-3
• Release Decision: RIPPUB
• Original Classification: S
• Document Page Count: 45
• Document Creation Date: December 28, 2016
• Document Release Date: November 26, 1999
• Sequence Number: 13
• Publication Date: January 1, 1969
• Content Type: REPORT

25X1 C
Approved Fo~j~~~,~e 2000/04/17 :CIA-Rf _~~- _ 006 - ~~
NO FOREIGN DISSE ~'~ ~' ~
~~, =~;
PHOTOGRAPHIC INTERPRETATIC~, :_~~REPORT
SELECTED
MAJOR CUMMUN (CATIONS
FACILITIES
NORTH VIETNAM
N P I C/ R-134/68
JANUARY 1969
GROUP 1: EXCLUDED FROM
AUTOMATIC DOWNG RASING
AND DECLASSIFICATION
Approved For Release 20'T CIA-RDP78B04569~m6500010(~ 3-3
NO FOREIGN DISSEM
 Approved For Release 2000/04/17 :CIA-RDP78B04560A006500010013-3
This document contains information affecting
the national defense of the United States,
within the meaning of Title 18, sections
793 and 794, of the U.S. Code, as amended.
Its transmission or revelation of its contents
to or receipt by an unauthorized person is
prohibited by law.
Approved For Release 2000/04/17 :CIA-RDP78B04560A006500010013-3
 RECORD
COPY N0.
PUB. DATE
Locnriun
MASTER
dAIC nc~civc~
~~^?
COPY
TEI
D
STOCK
MINIMUM ~
MAXIMUM ~~_
A
DISP IT N
CUT TO
DATE
CUT TO
DATE
COPIES DESTROYED
COPIES
COPIES
CUT TO
DATE
CUT TO
DATE
,
COPIES
COPIES
CUT TO DATE MASTER DATE
COPIES
NUMBER OF COPIES
DATE NUMBER OF COPIES
DATE
RECEIVED OR ISSUED
~D 149~D BAL
RE C
RECEIVED OR ISSUED
M0. DAY YR. RECD ~93~D BAL
.
M0. DAY YR.
3
5
69
-IST un~TT#
50
Sa
2
S ~
~
-~
~
~
~
4
~ _~~
~
u
~ v`.~~~
~
~" ~'
,
~
.--
~,
,, ~
/
~
25X1 C
Approved For Release 200
/04/1
7: CI
-RD
78B
456
AO
6500010013-3
TITLE
riTOT/'~ ~D 7 '2 i ~~52
SEC. CLASS. LOCATION
S~T~a~a~
 Approved For Release 2000/04/17 : CIA~04560A006500010013-3
NO FOREIGN DISSEM
NPIC/R-134/68
PHOTOGRAPHIC INTERPRETATION REPORT
SELECTED
MAJOR COMMUNICATIONS FACILITIES
NORTH VIETNAM
NATIONAL PHOTOGRAPHIC INTERPRETATION CENTER
Approved For Release 2000/04/17 : C~,~ 8B04560A006500010013-3 25X1 C
NO FOREIGN DISSEM
 P r!" ~ --
h ? 'S6 Ynn N~~Q D ^~
n 1 N'inji~ i''~tIUC Y
l.T~' "r'~'._M
No. Bo+ i
~np ffraf Phi ;
q Pu So Ma
FIA ( ~~
`~{ k~ !} 4 ~ L
{{s~,[~ ~~??++ ~
I hG"Lr~S?_;, Yr, Y+~- ~ r aA~ ~eo tich
#~~ ~.ulY~V tl
~~E~ ~ ~1
Dpng to
'.. Phu Ninh
!~ ``
O pD
~~/ KhBe Dbs
Klkt T Phu
Gia~ to.
b~+p,Mo
~'~?t ThW
Trorp
Viet
4~tla Than
i tI Oa XO
Ypn Nhbn
Binh Do
,_ Da^-0~
~j~Thuo,~ PMrc
tuon~
~:~
~~, .. .. ,~-~- M ~ a Throm ~~
-'~ Y~ 6WRr ~: ~ ~+ye
_:~~ TYa~ ,1 1 t
'Boni Cach Yen tb~g k
.Von Yan i O k ~r ~~ Teo
~ ~..
i uo of n, Phu Ma+L; .. Dio Chi r Y
- Trunp~o _.. ~ -.....
`t ~ ` 6~=
Tt~n poai ,V}}y -'
~~ ~~ Dinh `l~'
+yThruo~ for
V "~
~ANOICir A
:t
Ho Duaip^
"~ ::
.j..
~am Thnn!
ob xy/6~
7 rpjT uc
~_BAC.
~'1L17Y?
~,, T run
Mou~/
k Dony. ~.%
~..
Done Ksl
Bfnh Ph
#IWaero-as
Yii1~Rs
Duon?`+
n7oP+-Tq
25X1 C
Approved For Release 2000/04/17 :'~ ~~~78B04560A006500010013-3 NPIC/R-134/68
NO FOREIGN OISSEM
Approved For Release 2000/04/17 : CIl~i~B04560A006500010013-3
NO FOREIGN DISSEM
 NPIC/R-134/68
Approved For Releas~a~8~/1~~~~55E -3
INTRODUCTION
The North Vietnamese have established at least nine major
communications facilities in North Vietnam. Six of these, in the imme-
diate Hanoi area (Figure 1), are treated in detail in this report. These
installations provide Hanoi with the comprehensive transmitting and
receiving capability of a modern national and international communi-
cations network for direct support of North Vietnamese military and
civilian needs. The installations and the order in which they appear
in this report are as follows:
NAME GEO. COORDS. BE NO. PAGE NO.
Hanoi International Radio 20-5~N 105-46~ E 2
Communications Transmitter,
Dai Mo
Hanoi International Radio 21-O~N 105-41
Communications Receiver,
Son Dong
Lang Truoc Radio 21-15~ 105-52
Communications Transmitter
Hanoi Radio Broadcasting 20-59~V 105-47
Station, Me Tri
Hanoi Radio Communications 20-58~V 105-47
Station, I-Ia Dong No 7
Hanoi Radio Communications 20-51~ 105-53
Receiver, Phu Coc
Approved For Release 2000/04/17 : C~~~~~8B04560A006500010013-3
NO FOREIGN DISSE 25X1 C
 + IVI'IC/R-134/68
Approved For Release 2000/04/ 10013-3
NO FOREIGN D155E
HA~Ic~I IlTER~ITIC~i~AI
~AC~IO ~+~M~IElI~+~~TI~NS
TRr~IM~TTE~, [~,~I Mc~
Approved For Release 2000/04/17 : CI~1-~8B04560A006500010013-3
NO FOREIGN DI55EM
 Approved For Release 2000/04/17
NO FOREIGN DISSEM
a'-k~h~'r~ROassonoossooo~ nn
-3 NPIC/R-134/68
25X1 C
INSTALLATION OR ACTIVITY NAME
Hanoi International Radio Communications Transmitter, Dai Mo 25X1A
25X1 D 25X1 D
GEOGRAPHIC COORDINATES
20-5s~ 105-46~
MAP REFERENCE
AMS Series L7014, Sheet 6150 I, lst ed, 1965, Scale 1:50,000
(Unclassified )
This station is located 5.7 nautical miles (nm) southwest of
Hanoi and is served by an all-weather dirt road leading 1.1 nm south-
east to Route 6 at Ha Dong. Two AAA sites are within 0.5 nm east
and south of the station (Figure 2) .
The antenna farm contains 12 rhombic, four VEE, and 12 hori-
zontal dipole antennas (Figure 3) .The rhombic antennas provide long
range, high frequency communications to Europe, Asia, and Africa
with double rhombic antennas oriented toward Euro e and north 25X1 B
Africa (Fi ure 4) . The VEE antennas
are probably for omni-directiona , s ort range commu-
nications. The horizontal dipole antennas are oriented for high fre-
quency transmissions (primarily in the vicinity of mega- 25X1 D
hertz) throughout southern China and Southeast Asia (Figure 5) .
The entire antenna farm is probably fed from the main control build-
ing with some of the rhombic antennas having an alternate feed from
the alternate control area.
The primary transmitting facilities are housed in the H-shaped
building surrounded by an earth-mounded concrete wall (inset, Figure
3) except for three sections where the antenna feeds leave the building.
These three sections consist of earth fill between two concrete walls.
Also within the main control area are six support buildings, a substa-
tion, two guard towers, two cooling ponds, a probable pumphouse,
and an underground reservoir.
South-southeast of the main control area is the alternate control
25X1 D area which was constructed in_ It contains two earth-mounded
bunkers, one, a control bunker with feed lines leading to some of the
rhombic antennas; the other bunker is probably for support.
The fenced support area northeast of the main control area con- 25X1 B
tams four probable barracks, one messhall, a substation, and three
support buildings.
The control building at Dai Mo is connected to the Hanoi Radio
Broadcasting Station, Me Tri
1.6 nm northeast, by a cable scar (Figure 2) . Another cable scar and
a land line are evident leading northeast from the Me Tri control build-
ing toward the Hanoi Citadel. This communications line is probably
used to link the government control facilities in Hanoi with the two
radio transmitting stations.
Electric power is provided by external sources via substations
within the control and support areas. Diesel generators for emergency
power are probably available; however, they have not been identified
on photography.
Approved For Release 2000/04/17 : CI>~-B04560A006500010013-3
NO FOREIGN DISSEM 25X1 C
 Approved For Release 2000/04/17 : ~71#~~78B04560A006500010013-3IVPIC/R-134/68
NO FOREIGN L1155EM
Approved For Release 2000/04/17 : CTT8B04560A006500010013-3
NO FORHGN D1SSE
 SECRET
A roved For Rel~s~~~~~~181~~~~ 3-3
pp
NPIC f R-134/68
=ROAD
-TRAIL
FENCE
POWERLINE
ITEM 15
l
----- FEEDLINE
CABLE SCAR
P,NTENNA CONFIGURATION
? MAST
NPIC rn-sso7
POLE SEPARATIDN
(~]
NDTE: EACH ANTENNA HAS 90? INCLUOEO (APEX) ANGLE,
IS OMNIDIRECTIONAL AND EAC~1 LEG IS ~ WAVE. LU[~G
ANT POLE EST INITIAL
NO SEPARATION ANT GREAT
(FT) LENGTH CIRCLE
(FT) (?J
PROBABLE CORRESPONDENT
{SEE FIGURE 5)
HUE/HA GIANG
HUE/HA GIANG
CAO BANG/PHNOM PENH
CAO BANG/PHNOM PENH
CAO BANG/PHNOM PENH
YULIN/LAO CAI
YULIN/LAO CAI
SOUTHEAST CHINA/NORTHEAST LAOS
MONG CAI/LUANG PRABANG
MANNING{PLAINS OES JARRES
SOUTHEAST CHINA/NORTHEAST LAOS
SOUTHEAST CHINA/NORTHEAST LAOS
COMPUTED
FREQUENCY
(MEGAHERTZ)
BY POLE
SEPARATION
SECRET
COMPUTED FREQUENCY
(MEGAHERTZ)BY
POLE SEPARATION
NO FOREIGN DISSE 25X1 C
Approved For Release 200010411 3-3
 SE
Approved For ReI~~~DRI
13-325X1 C
NPIC/R-134/68
NO FOREIGN DI55EM 5X1C
Approved For Release 2000104117 3-
 Approved For Release 2000/04/17
NO FOREIGN DISSEM
E{URMA
?- ~~,~,
~.-~y Mt3NG GAl
'~J ~SAIGON_
*-~~'
FIGURE 5. AZIMUTH PROJECTIONS' FOR HORIZONTAL DIPOLE ANTENNAS AT HANOI INTERNATIONAL RADIO COM-
MUNICATIONS TRANSMITTER, DAI MO, NORTH VIETNAM.
-7-
Approved For Release 2000/04/17 : C~,qr-~p~~8B04560A006500010013-3
NO FOREIGN DISSEM ~[ 1~ I 25X1C
13-3 NPIC/R-134/68
 Approved For Release 2000/04/17 : CI~-~B04560A006500010013-3 NPIC/R-134/68
NOD FOREIGN DI55EM
HA~11 I1TER~J~-Tlc~IAL
RA[~I ~~~I'~~11~11~ATIt~NS
RE~GEIVER, LAG
Approved For Release 2000/04/17 : CI~-F~8B04560A006500010013-3
Np FQRHGN DISSEM 25X1 C
 N
200/04~17 SE
Approved For Rele~s~6REI~N D15SEM 325X1C
Hanoi International Radio Communications Receiver, Son Dong 25X1A
UTM COORDINATES GEOGRA PHIC COORDINATES COMIRE%NO~
21-02~T 105-41~ _ - None
MAP REFERENCE
AMS Series L7014, Sheet 6151 III, 1st ed, 1965, Scale 1:50,000
(Unclassified )
The Son Dong receiving station, 8.6 nm west-northwest of Hanoi,
is served by an unnumbered dirt road leading 1 nm west to Route 65
at Que Duong. One eight-gun AAA site is 0.5 nm southwest of the
station (Figure 6) .
The antenna farm contains 15 rhombic and six horizontal dipole
antennas (Figure 7) . The rhombic antennas are capable of receiving
long range, high frequency communications from Europe, Asia, and
Africa with double rhombic antennas oriented toward Europe and
north Africa (Figure 8) . The horizontal dipole antennas are oriented
for high frequency reception (primarily between ega- 25X1D
hertz) throughout southern China and Southeast Asia Figure 9) .
Feed lines from all the antennas lead to the control building with feeds
from the rhombic antennas, oriented toward Europe, also leading to
a bunkered probable alternate receiver building.
The control area consists of the primary receiving facilities
housed in a single-story building, a generator and transformer building,
two support buildings, and a guard tower. A secured alternate control
area contains two earth-mounded bunkers, one, a probable receiver
bunker and the other, a probable support bunker. The support area,
separated from the control area by a wall, contains 15 support build-
ings and a guard tower.
PIC/R-134/68
Approved For Release 2000/04/17 : (~1~78B04560A006500010013-3
NO FOREIGN DISSEM 25X1 C
 Approved For Relea~~e ORO~N 615~~Nt
3 25X1 C
NPIC/R-134/68
Approved For Release 2000/04/17 : CIA~$~04560A006500010013-3
h10 FaRfIGM DISSEM
 SECRET
Approved FoN~~ ~~~ OOIb'DOUf~3-3
O
ROAD
FENCE
POWERLINE
FEEDLINE
ANTENNA
CONFIGURATION
EARTH MOUND
MAST
NPIC M-5311
ITEM DESCRIPTION
1 RECEIVER BUILDING
2 GENERATOR AND TRANSFORMER
BUILDING
3 SUPPORT BUILDING
4 SUPPORT BUILDING
5 SUPPORT BUILDING
6 SUPPORT BUILDING
1 SUPPORT BUILDING .
8 SUPPORT BUILDING
9 4 SUPPORT BUILDINGS
10 SUPPORT BUILDING
11 SUPPORT BUILDING
12 SUPPORT BUILDING
13 SUPPORT BUILDING
14 SUPPORT BUILDING
15 2 SUPPORT BUILDINGS
1fi 7GUARDTOWERS
11 EARTH-MOUNDED PROB
ALTERNATE RECEIVER
BUILDING
NPIC/R-134Jfi8
DIMENSIONS (FT)
FIGURE 7. HANDI lNiERNATIONA[ RADIO COMMUNICATIONS RECEIVEQ SON DONG, NORTH VIETNAM.
SECRET
Approved ~9r~R~l~&~~~db
066~6~13-3
 NO FOREIGN DISSE 25X1 C
Approved For Release 2000/04/17 : CIA78B04560A006500010013-3
 Approved For Release 2000/04/17
NO FOREIGN DISSEM
BURMA
NORTH s
__
VIETNAM
SAIGON
FIGURE 9. AZIMUTH PROJECTIONS FOR HORIZONTAL DIPOLE ANTENNAS AT HANOI INTERNATIONAL RADIO COM-
MUNICATIONS RECEIVER, SON DONG, NORTH VIETNAM.
-13-
Approved For Release 2000/04/17 : Cf~~6B04560A006500010013-3
NO FOREIGN DISSEM 25X1 C
NPIC / R-134/68
.. ~, - `~
~~
KRUNG THEP SOUTH '~~'~
BANGKOK) ~.? OAMBODI ..~ VIETNAM ~'~
511~~'tf
~~ '~~~ (,,..- ~''~ ('I~FN~I
,,.,,J
PHNOM PENN r"~~~
 Approved For Release 2000/04/17 : C~~~~8B04560A006500010013-3 EPIC/R-134/68
NO FOREIGN DI55EM
LAS T'U~
~,~ [~- I CCU Nt I~11.11 I ~,~T I ~ ~ 5
T~A1~~V11TTE4~
Approved For Release 2000/04/17 : CI1~~B04560A006500010013-3
NO FO~tEiGN DISSEM 25X1 C
 NPIC/R-134/68
Approved For Release 2000/04/17 013-3
NO FOREIGN DISSEM 25X1 C
25X1 D Lang Truoc Radio Communications Transmitter
GEOGRAPHIC COORDINATES
21-15~1V 105-52~E
AMS Series L7014, Sheet 6151 I, 1st ed, 1965, Scale 1:50,000
_(Unclassi_fied) _____ __
LATEST IMAGERY USED rNEGATION DATE IIf requiredl
The majority of the horizontal dipole antennas are oriented for high
frequency communications to all of Southeast Asia from Rangoon to
the South Vietnam coast. The back azimuths for these antennas cover
all of southern China (Figure 13) . Antenna feedlines for all antennas
lead from the transmitter building.
The transmitting facilities are housed in asingle-story, H-shaped,
concrete building. A pumphouse, a generator, and an adjacent support
building are also in the control area. A pipeline for cooling water leads
from a lake 0.8 nm south to the transmitter building.
25X1 B _ are probably for omni- irectiona ,sort range communications.
ure 12) . The VEE antennas,
The Lang Truoc facility is located 13.9 nm north of Hanoi and
is served by a dirt road leading 1 nm west to Route 3 at Tien Duoc
Thuong. The Hanoi-Thai Nguyen Railroad Line asses immediately
west of the facility. This station, constructed is probably being
used to support insurgency operations in Sout east Asia (Figure 10) .3
The antenna farm contains three rhombic, four VEE, and 13
horizontal dipole antennas (Figure 11) . Two of the rhombic antennas
are oriented for day-night transmission toward Moscow, while the
third rhombic antenna is oriented for transmission toward Peking (Fig-
Approved For Release 2000/04/17: 8B04560A00650001001325X1 C
NO FOREIGN DISSEM
 Approved For Release 2000/04/17
NO FORfIGN t?ISSf~l
NPIC/ R-134./68
1 25X1 C
FIGURE 10. LANG TRUOC RADIO COMMUNICATIONS TRANSMITTER, NORTH VIETNAM.
- 16 -
Approved For Release 2000/04/17 : CI~~B04560A006500010013-3
 NO FOREIGN DISSEM 25X1 C
Approved For Release 2000/04/17 : CI - A006500010013-3
1 TRANSMITTER BUILDING 195 X50
2 PUMP HOUSE 25 X 25
3 GENERATOR BUILDING 25X1 D
4 SUPPORT BUILDING
AVERAGE INITIAL COMPUTED
ANT AXIS (FT) LENGTH TILT GREAT PROBABLE FREQUENCY
NO MAJ MIN ONE SIDE ANGLE CIRCLE CORRESPONDENT (MEGAHERTZ)
(FT) (?) BEARING (SEE FIGURE 12) BY POLE
(?) SEPARATION
POLE EST INITIAL
ANT SEPA- ANT GREAT
NB RATION LENGTH CIRCLE
(FT) (FT) BEARING
(?)
ROAD
~~- RAILRDAD
----- FEEDLINE
--^--PIPELINE
/~ ANTENNA
~/ CONFIGURATION
? MAST
MGSCOW
MOSCOW
PEKING
^ 25X1 B
COMPUTED
PROBABLE CORRESPONDENT FREQUENCY
(SEE FIGURE lG) (MEGAHERTZ)
BY POLE
SEPARATION
THAI INSU RGENCY
AREA
TONKIN GULF
HUE, NHA TRANG
SAM NEUA, WANG
PRABANG
THAI INSURGENCY
AREA
VIENTIANE
MU GIA PASS,
PHNOM PENH
MU GIA PASS,
PHNOM PENH
THAI INSURGENCV
AREA
VIENTIANE
SEPONE} SAIGON
PMDNG dALY
PHONG SALY
POLE INCLUDED COMPUTED
ANT SEPA- (APEX) FREQUENCY
NO RATION ANGLE (MEGAHERTZ)
(FT) (?) BY POLE
25X1 D SEPARATION
- .25X1 B
- 17 -
Approved For Release 2000/04/17 :CIA-RDP78B04560A006500010013-3
SECRET 25X1 C
NO FOREIGN DISSEM
 Approved For Release 2000/04/17 :CIA-RLSP78B04560A006500010013-3
25X1C NO FpRFIGN DISFFM
 Approved For Release 2000/04/17 ;
NO FOREIGN DISSEM
BURMA
A--NT 2Q
~-~_
.ANT ig
~~1UNGCHING
z
a
~~IE~I!?NONG
VI T
iRUNG TH
(BANGKO
~r
P~~ ~` ~SHANTOU~
FIGURE 13. AZaMUTN ~ROJECTtONS'FOR HORIZONTAL DIPOLE ANTENNAS AT LANG TRUOC RADIO COMMUNICA-
TIONS TRANSMITTER, NORTH VIETNAM.
-19-
Approved For Release 2000/04/17 : C~1~8B04560~~60010013-3
NO FOREIGN DISSEM JCL~C ~
013-3 NPIC/R-134/68
 Approved For Release 2000/04/17 : C~~~'~8B04560A006500010013-3 NPIC/R-134/68
NO FQR~IGM ~1155EM
HA1~1~1 #ADI~
B~A[~ATI~IC ~TATI~IV,
N1E Tf~l
Approved For Release 2000/04/17 : CI B04560A006500010013-3
25X1 C
NO FOREIGN D155EM
 Approved For Rele~~e~O1tEfGN~fSS~EM
Hanoi Radio Broadcasting Station, Me Tri 25X1A
AMS Series L7014, Sheet 6150 I, 1st ed, 1965, Scale 1:50,000
NPIC/R-134/68
GEOGRAPHIC C ORDINATES OMIREX NO?
20-59 105-47 one
13-3
25X1 C
(Unclassified )
The Me Tri Broadcasting Station is located 4.3 nm southwest
of Hanoi and is served by a secondary road leading 1 nm southeast
to Route 6 at Phung Khoang. Defenses for this installation include
four AAA sites within 0.5 nm of the station (Figure 14) . The entire
station, including the antenna masts, is located within a rectangular
fenced area with a guard tower at each corner.
The antenna farm contains two vertical radiators, four double
rhombic antennas in day-night pairs, and seven horizontal dipole an-
tennas (Figure 15) . The towers for the vertical radiators were ap-
parently first constructed to support a horizontal dipole broadcast
array; however, they presently support top loaded vertical radiators
for omni-directional transmission. One pair of rhombic antennas is
oriented for transmission toward Saigon and Djakarta, while the other
pair of rhombic antennas is oriented for transmission toward central
Europe (Figure 16) . On the rhombic antennas' oriented Toward the'
sQUth, certain antenn%~i~~,,,,,,,,,,,,,~~i,~~~~~~ting that
~,
each double -rhombic consists df a high and a lnw antenna... One pair
of horizontal dipoles is aligned with the antennas parallel to each
other and oriented for north-south communications with a provision
for switching the feed from one dipole to the other. Another horizontal
dipole is oriented for transmission toward the Gulf of Tonkin or Kun-
ming, China (Figure 17) . Feedlines to these antennas lead from the
main transmitter building. Four additional horizontal dipole antennas
are oriented for transmission in a north-south direction and cut for
different frequencies with feedlines leading from the secondary trans- 25X1 D
mitter building.
The control area of the facility contains the main transmitter
building, as well as an adjacent generator building (separately sur-
rounded by double-walled, earth-filled, blast walls approximately-
feet thick), an unprotected secondary transmitter building, a bunkered
support building, three partially revetted buildings, a water tower,
a cooling pond, and three additional support buildings. The support
area contains a gatehouse, a messhall, a substation, seven barracks,
and 14 support buildings. One of the support buildings in the western
corner of the compound had foundations laid for blast walls in _ 25X1 D
however, the foundations remain incomplete.
A cable scar connects the main transmitter building to the control
area of the Hanoi International Radio Transmission Station, Dai Mo,
1.6 nm southwest. Another cable scar and a land line are discernible
leading northeast from the Me Tri control building toward the Hanoi
Citadel. This communications line, constructed in_ is probably 25X1 D
used to link the government control facilities in Hanoi with the two
transmitting stations.
.Electric power is provided to the station from external sources
via a substation, and from a diesel generator within the control area.
Approved For Release 2000/04/17 :
~6~78B04560A006500010013-3
NO FOREIGN DISSEM
25X1 C
 Approved For Release 2000/04/17
NC- fQREIGN DISSEM
NPIC/R-134/68
13X1 C
FIGURE 14. HANOI RAD)O BRQADCASTlNG STATI JN, ME TR), NC3RTH VIETNAM.
N4 FOREIGN DI~SEM
Approved For Release 2000/04/17 : CIA~~04560A006500010013-3 25X1 C
 Approved For Re~e4a~~R~~~(~~
NPIC/R-134/68
ROAD
FENCE
"' WALL
-- POWERLINE
------ FEEDLINE
____,_.__ ._ CABLE SCAR
~, ANTENNA
CONFIGURATION
EARTH MOUND
MAST
_~~
ITEM
12
~ ~.-,
.DESCRIPTION DIMENSIONS (FT)
MAIN TRANSMITTER BUILDING {WALLED)
AVERAGE
INITIAL
13
14
GENERATOR BUILDING (WALLED)
SECONDARY TRANSMITTER BUILDING
ANT
NO
AXIS (FT)
MAJ MIN
LENGTH
ONE SIDE
GREAT PROBABLE CORRESPONDENT.
CIRCLE
'
COMPUTED
FREQUENCY
15
16
BUNKERED SUPPORT. BUILDING
PARTIALLY REVETTED BUILDING
(FT)
(SEE FIGURE
16)
BEARING
(MEGRHERTZ}
17
PARTIALLY REVETTED BUILDING
(?)
18
PARTIALLY REVETTED BUILDING
25X1 ~
19
COOLING POND
1
SAIGON, DJAKARTA
20
SUBSTATION
2
3
SAIGON, DJAKARTA
21
320 FT VERTICAE RADIATING ANTENNA
4
CENTRAL EUROPE
CENTRAL EUROPE
22
MAST
325 FT VERTICAL RADIATING RNTENNA
NOTE: EACH ANTENNA TILT ANG
6
?
MAST
LE IS
5
AND IS ASSUMED TO BE FOUR WAVELENGTHS LONG ON A SIDE.
24
SUPPORT BUILDING
25
SUPPORT BUILDING
2fi
WATER TOWER
~.
28
SUPPORT BUILDING
29
SUPPORT BUILDING
30
SUPPORT BUILDING
POLE
EST
INITIAL
COMPUTE?
31
SUPPORT BUILDING
ANT
SEPARATION
ANT
GREAT
PROBABLE CORRESPONDENT
FREQUENCY
32
33
SUPPORT BUILDING
SUPPORT BUILDING
NO
(FT)
LENGTH
(FT)
CIRCLE
BEARING
?
(SEE FIGURE 17)
(MEGAHERTZ)
BY POLE
34
35
BARRACKS
BARRACKS
(
>
SEPARATION
36
BARRACKS
5
SAIGON/CHUNGKING
37
MESSHALL AND KITCHEN
6
SAIGON/CHUNGKING
38
SUPPORT BUILDING
7
SAIGON/CHUNGKING
39
SUPPORT BUILDING
8
SAIGON/CHUNGKING
40
SUPPORT BUILDING
9
TONKIN GULF/KUNMING
41
BARRACKS
10
SAIGON/CHUNGKING
42
BARRACKS
11
SAIGON/CHUNGKING
43
BARRACKS
44
BARRACKS
45
SUPPORT BUILDING
25X1 ~
46
SUPPORT BUILDING
47
SUPPORT BUILDING
48
SUPPORT BUILDING
49
SUPPORT BUILDING
FIGURE 15. HANOI RADIO BROADCASTING STAAON, ME TRI, NORTH VIETNAM.
SECRET
SECRET
NO FpREIGN DISSEM
25X1 C
Approved For Release 2000/0
013-3
 FIGURE I6. FORWARD AZIMUTH PROJECTIONS FOR RHOMBIC ANTENNAS AT HANOI RADIO BROADCASTING STATION, ME TRI, NORTH VIETNAM.
-)~ _
Approved For Release 2000/04/17 :CIA-~~~78B04560A006500010013-3
 Approved For Release 2000/04/17 : CI~~R7SB04560i~~{~~00010013-3 NPIC/R-134/68
NO FOREIGN DISSEM
BURMA
LUANG
PRABANG~
(NOR4
YIETN
VIENTIANE
~? C
~CAMBO
FIGURE 17. AZIMUTH f'R01ECTtONS FOR HORIZONTAL DIPOLE ANTENNAS AT HANOI RADIO BROADCASTING STA-
TION, ME TRI, NORTH VIETNAM.
-25-
Approved For Release 2000/04/17 : ~~78B04560A006500010013-3
NO FOREIGN DISSEM 25X1 C
NANNING~
i
4NG
~~ SOUTH ~~~`
VIETNAM c~~
 Approved For Release 2000/04/17
NO FOREIGN DISSEM
;P~18B04560A006500a
0013-3 NPIC/R-184/68
HA~lc~i RA~31~
~C~N1N~I~fi~ I~AT1~1~~ TATIt~N,
HA [~+~T"+~C ltd 7
Approved For Release 2000/04/17 : CI B04560A006500010013-3
NO FOREIGN DISSEM 25X1 C
 NPIC/R-134/68
Approved For Rel~~(~R~I~~~~S~~A 013-3
25X1 C
Hanoi Radio Communications Station, Ha Dong No 7
25X1 D ----- --- ------ -------- __ -... ---- _ - ------_ __ --
~F~ nt'.anaHir rnnenitiercc T~arFr,~
25X1 D 20-58~N 105-47
COMIREx NO~
None
' AMS Series L7014, Sheet 6150 I, 1st ed, 1965, Scale 1:50,000
(Unclassified) .
This station is located 3.5 nm southwest of Hanoi and 1.1 nm
east of Ha Dong. It is served by a dirt road leading 0.5 nm northwest
to Route 6. One AAA site is withixx 0.5 nm of the station (Figure 18) .
The antenna farm contains two double rhombic antennas (one
day-night pair) , six. horizontal dipole antennas (including two day-
night pairs) , and one VEE antenna (Figure 19) . Feedlines lead from
the transmitter building to all of the antennas. The feedlines for the
rhombic antennas lead to a switch in the center of each antenna. Feeds
leading fiom this switch to each end of the antenna permit transmission
toward either Saigon or Lanchou, China (Figure 20) . In addition, a dis-
sipation line connected to the switch allows for a continuing connection
to the end of the antenna opposite the antenna feed. One day-night
pair of horizontal dipole antennas is oriented for transmission toward
the Gulf of Tonkin and Lao Cai, while the other pair is oriented for
transmission toward Nam Dinh and Kunming, China. The other two
horizontal dipoles are oriented for transmission toward Chungking
and Saigon and toward Cao Bang and Phnom Penh, Cambodia (Fig-
ure 21) . The VEE antenna
-is probably for omni- xrectxona ,sort range communxcatxons.
The transmitters are in a single-story concrete building. Four
support buildings, a barracks, a water tower, a gatehouse, and a sub-
station are also within the walled control area. A possible personnel
bunker and a water pond are outside the control area.
Electric power is provided from external sources via a substation
within the control area. A diesel generator is probably available for
emergency power; however, none has been identified on photography.
Approved For Release 2000/04/17 : C~TT8B04560A006500010013-3
NO FOREIGN DISSEM 25X1 C
 ~~
Approved For Release 2000/04/17:
~~ NPIC / R-134/68
8B04560A006500010013-3
NO FQREIGN DISSEM
25X1 C
Approved For Release 2000/04/17 : CI1~~B04560A006500010013-3
25X1 C
M4 FdREIGN Di55EM
 Approved For Release 2000/04/17 : CIA~04560A006500010013-3 NPIC/R-134/68
NO FOREIGN DISSE 25X1 C
BUNKER
j to
ROAD
~- FENCE
----- POWERLINE
----- FEEDLINE
.~, ANTENNA
CONFIGURATION
? MAST
. 7~E1
1 POND
2 GATEHOUSE
3 SUBSTATION
4 BARRACKS
5 SUPPORT BUILDING
6 SUPPORT BUILDING
7 WATER TOWER
8 SUPPORT BUILDING
9 TRANSMITTER BUILDING
a {2)
b
ANT AXIS (FT) AVERAGE TILT
NO MAX MIN LENGTH ANGLE
ONE SIDE (?j
(FT)
INITIAL
GREAT
CIRCLE
BEARING
(?)
65 175/355
65 175/355
FEET (APRX)
NPIC M 5323
PROBABLE COMPUTED
CORRESPONDENT FREQUENCY
(SEE FIGURE 20) (MEGAHERTZ)
SAIGON, DJAKARTA
LANCHOU
SAIGON, DJAKARTA,
LANCHOU
INITIAL
ANT POLE EST GREAT
NO SEPARATION ANT CIRCLE
(FT) LENGTH BEARING
(FT)
NAM DINH/KUNMING
NAM DINH/KUNMING
TON KIN GULF/LAO CAI
TONKIN GULF/LAO CAI
CHUNGKING/SAIGON
CAO BANG/PHNOM PENH
PROBABLECORRESPONDENT
(SEE FIGURE 21)
COMPUTED
FREQUENCY
(MEGAHERTZ)
BY POLE
SEPARATION
Approved For Release 2000/04/17: S 32X1 C
NO FOREIGN DISSEM
 SECRET
25X1 C
Approved For Rel~?~BdGtllA~4 13-3
SECRET
N4 FOREIGN DISSEM
Approved For Release 2000104117
NPIC/R-134J68
 Approved For Release 2000/04/17 ;
NO FOREIGN DISSEM
R~(NG~O~ON
NANNING~
SAIGON
FIGURE 21. AZIMUTH PROJECTIONS' FOR HORIZONTAL DIPOLE ANTENNAS AT HANOI RADIO COMMUNICATIONS
STATION, HA DONG NO 7, NORTH VIETNAM.
Approved For Release 2000/04/17 : C~1~78B04560A006500010013-3
J LRC' 25X1 C
NO FOREIGN DISSEM
13-3 NPIC/R-134/68
25X1 C
 ~ NPIC/R-134/68
Approved For Release 2000/04/17 ? 13-3
NQ FaREIGM DI55E
HA41 R~C~I~
CC~I'~N~l.IIICATIIS I~ECEIVE~,
PHU ~~
Approved For Release 2000/04/17 : CI~~R~>~B04560A006500010013-3
MO FOREIGN DI55EM 25X1 C
 Approved For Release 2000/04/17
NO FOREIGN DISSEM
Hanoi Radio Communi2~X1 D Receiver, Phu Coc
25X1 D 25X1 D
GEOGRAPHIC COORDINATES
20-51~i 105-53~E
MAP RE FERENC E
AMS Series L7014, Sheet 6150 I, lst ed, 1965, Scale 1:50,000
(Unclassified )
25X1 B
25X1 B
VEE. and six horizontal dipole antennas (Figure 23
nm east of Phu Coc, is served by a dirt road leading 1.2 nm west to
Route lA and the Hanoi-Vinh Railroad Line (Figure 22) .
The antenna farm contains six double-bay FISHBONE, eight
NPIC/R-134/68
013-3
25X1 C
This station, located 10.5 nm south-southeast of Hanoi and 0.4
The FISHBONE antennas
would, however, still provide wide ban ong range, high frequency
reception from north Africa, Europe, southern China, Taiwan, south-
ern Japan, Saigon, Cambodia, Java, and Sumatra (Figure 24) . The
ably for omni-directional, short range communications. The horizontal
dipole antennas consist of three day-night pairs oriented for communi-
cations with Lang Son-Vientiane, Haiphong-Hoa Binh, and Dong Hoi-
Ha Ciang (Figure 25) . Antenna feedlines from all antennas lead to the
receiver building.
The walled control area contains atwo-story concrete receiver
building, three support buildings, two gatehouses, and a substation.
The fenced support area just north of the control area contains an
auditorium, four two-story barracks, a messhall, a gatehouse, a sub-
station (outside the fenced area ), 13 support buildings, a water tower,
a probable swimming pool, and a basketball court.
Electric power is provided from external sources via substations
within the control and support areas. Diesel generators for emergency
power are probably available; however, they have not been identified
on photography.
VEE antennas are prob- 25X1 B
Approved For Release 2000/04/17 : C~~~~8B04560A006500010013-325X1 C
NO FOREIGN DISSEM
 Approved For Release 2000/04/17
NO FOREIGN dISSENI
NPIC/R-134/68
13-3
25X1 C
Approved For Release 2000/04/17 : CI~7~B04560A006500010013-3
ND FOREIGN DI55EM 25X1 C
 Approved For Relea~~M
EST INITIAL
ANT POLE ANT GREAT PROBABLE CORRESPONDENT
NO SEPARATIDN LENGTH CIRCLE (SEE FIGURE 25)
{FT) {FT) BEARING
(?)
NPIC/R-134/68
PROBABLE
CORRESPONDENT
(SEE FIGURE24)
NORTH AFRICA
EUROPE
SOUTHERN CHINA,
SOUTNERNJAPAN
SOUTHERN CHINA,
TAIWAN
SAIGON,JAVA
CAMBODIA, SUMATRA
COMPUTED
FREQUENCY
(MEGAHERTZ)
BY POLE
SEPARATION
35 23D
36 8D
37 230
38 8D
39 BD
40 230
LANG SON/VIENTIANE
LANG SON/VIENTIANE
HAIPHONG/HOA BINH
HAIPHONG/HOA BINH
DONG HOI/HA GIANG
DONG HOI/HA GIANG
25X1 D
25X1 D
:~..
ROAD
POLE
INCLUDED
COMPUTED
~ FENCE
ANT SEPARATION
(APEX)
FREQUENCY
- - - POWERLINE
NO (FT)
ANGLE(?)
(MEGAHERTZ)
----- FEEDLINE
BY POLE
[~ ANTENNA CONFIGURATION
SEPARA110N
? MAST
41 sD
42 50
43 40
44 80
45 50
200 0 500
47 125
FEET (APRX)
48 125
NPIC M-sin
NOTE: EACH ANTENNA IS OMNIDIRECTIONAL AND ERCH LEG
IS ~~ WAVE LONG.
SECRET
1 POOL
2 SUPPORT BUILDING
3 BARRACKS
4 BARRACKS
5 SUPPORT BUILDING
6 SUPPORT BUILDING
7 MESSHALL
a KITCHEN
b MESSHALL
8 SUPPORT BUILDING
9 SUPPORT BUILDING
10 BASKETBALL COURT
11 SUPPORT BUILDING
12 SUPPORT BUILDING
13 AUDITORIUM
14 SUPPORT BUILDING
15 SUPPORT BUILDING
16 BARRACKS
17 BARRACKS
18 SUPPORT BUILDING
19 SUPPORT BUIIDiNG
20 WATER TOWER
21 SUPPORT BUILDING
22 SUBSTATION
23 SUBSTATION
24 SUPPORT BUILDING
a
b
25 2 GATEHOUSES
26 RECEIVER BUILDING
a
b
27
28
(2)
SUPPORT BUILDING
SUPPORT BUILDING
INITIAL GREAT CIRCLE
ANT NO BEARING
29
30
25X1 D 31
32
SECRET
Approved For Rele~Q~4R~Nd 3-3 25X1 C
 -~s-
Approved For Release 2000/N4 ~okElcNni3f 500~~ f~Q1L3-3
 Approved For Release 2000/04/17
NO FOREIGN DISSEM
BtlRMA
ANNING~
PHU COCA
ORTH
VI TNAM
ro ~ 2 ~ '
~s ~
m `~
KRUNG THEP~2 ~~OUTH ~~~_
\(BANGKOK) ~?? CAMBODIA ?~ V TNAM ~`~~
l~f~i r~
/~ ~.~ ~~ .,. ?SAIGON
FIGURE 25. AZIMUTH f'RO~lECTIONS FOR HORIZONTAL DIPOLE ANTENNAS AT HANOI RADIO RECEIVER, PHU COC,
NORTH VIETNAM.
-37-
Approved For Release 2000/04/17: 8B04560A006500010013-3
NO FOREIGN DISSEM 25X1 C
NPIC / R-134/68
3-3
 Approved For Release 2000/04/17 :CIA-RDP78B04560A006500010013-3
25X1 D
Next 2 Page(s) In Document Exempt
Approved For Release 2000/04/17 :CIA-RDP78B04560A006500010013-3
 NPIC/R-134/68
Approved For Rele~~e~~~~~~~(~7~ 13-3
25X1 C
REFERENCES (Continued)
1. NPIC. R-267/66, Southeast Asia Activit Re ort, Communications Facilities, North Vietnam, Feb- 25X1A
ruary 1968 (SECRET/No Foreign Dissem used for all items.
2. CIO/CIA. NPIC Report No. 270/66, 27 June 1966, enclosure in
(CONFIDENTIAL) used for the Ilanoi International Radio Receiver, Son Dong.
3. NPIC. R-47/68, Photographic Interpretation Memorandum, Hanoi Area Communications Facilities
Probably Used for Insurgency Operations, March 1968 (CONFIDENTIAL/No Foreign Dissem- 25X1C
for the Lang Truoc Radio Communications Transmitter.
4. US Department of Commerce. JPRS. 33,926, 27 January 1966, translation from Russian of Antennas
and Masts, F. A. Savitskiy, Ministry of Communications, USSR, Moscow, 1962, pp. 70-88 (UN-
CLASSIFIED) used for all items.
5. Jasik, Ilenry, ed. Antenna Engineering IIandbook, McGraw-Hill Book Company, Inc., New York,
1961 (UNCLASSIFIED) used for all items.
6. Laport, Edmund A. Radio Antenna Engineering, McGraw-Hill Book Company, Inc., New York,
1952 (UNCLASSIFIED) used for all items.
REQU I REM ENT
NSA. SOC/ R 139-67
NPIC Project 250135AF
Approved For Release 2000/04/17 : C~~i78B04560A006500010013-3
NO FOREIGN DISSEM 25X1 C
 Approved For Release 2000/04/17 :CIA-RDP78B04560A006500010013-3
25X1C
Approved For Release 2000/04/17 :CIA-RDP78B04560A006500010013-3