(Sanitized) SWATOW-CLASS PGM HA NOI, NORTH VIETNAM

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP79-00849A000200010004-7
• Release Decision: RIPPUB
• Original Classification: S
• Document Page Count: 2
• Document Creation Date: December 28, 2016
• Document Release Date: March 8, 2006
• Sequence Number: 4
• Publication Date: July 10, 1966
• Content Type: REPORT

Approved For Release 2006/03/16: CIA-RD(%LT9W0849A000200010004-7
SWATOW-CLASS PGM
HA NOT, NORTH VIETNAM
2103N 10551E
ATTACHMENT TO L-1160
10 JULY 1966
PAGE 1
1.
SIGNIFICANCE:
THIS BRIEFING BOARD DEPICTS TWO SWATOW-CLASS MOTOR GUNBOATS NEAR
2.
HA NOI.
LOCATION:
3.
THE BOATS
OF THE RED RIV
COLLATERAL:
ARE LOCATED 2.2 NM NORTH OF HA NOI ON T
ER AT UTMS WJ897283 AND WJ900280.
HE NORTHEAS
T BANK
EXPLOITAT
ION OF RECONNAISSANCE PHOTOGRAPHY OF MAY
1966 REVEAL
ED
TWO DESTROYED NORTH VIETNAMESE PROBABLE SWATOW-CLASS MOTOR GUNBOATS.
BOTH WERE BURNED DOWN TO THE WATER LINE, REVEALING THE INTERNAL
ENGINEERING COMPONENTS. MOST SIGNIFICANT ON THIS PHOTOGRAPHY WAS THE
FACT THAT EACH GUNBOAT HAD ONLY TWO MAIN ENCINES.
PRESENT ENGINEERING ESTIMATES OF THESE CHINESE COMMUNIST-BUILT
UNITS INDICATE THAT THEY CARRY FOUR M50-F4 SUPERCHARGED DIESEL ENGINES
AS THE MAIN PROPULSION SYSTEM. THIS ESTIMATE IS BASED ON THY SOVIET
P-6 CLASS TORPEDO BOAT ENGINEERING PLANT. THE SWATOW-CLASS IS A CHINESE
MODIFICATION OF THE P-6 HULL DESIGN WITH TORPEDO TUBES REMOVED AND 37MM
GUNS AND NEW SUPERSTRUCTURE ADDED.
THIS WAS THE FIRST PHOTOGRAPHIC EVIDENCE THAT THE SWATOW-CLASS
NGA Review Complete
I
These notes have been prepared for briefing purposes only and should not be used for detailed analytical work. Their use
should be restricted to the particular briefing board(s) they were prepared for and must be considered valid only for the re
porting period as indicated by the date of issue. For information concerning these notes contact Chief, Collateral Support
Division. NPIC.
Release 2006/03/16 : ET
25X1
 Approved For Relear ~nnatnst~A ? CIA ELflRdannnn9nnnlnnna_7
(c) NATIONAL PHOTOGRAPHIC INTERPRETATION CENTER
ATTACHMENT TO L-1160
10 JULY 1966
PACE 2
PG" MAY CARRY ONLY TWO MAIN ENGINES. ALTHOUGH THIS PHOTOGRAPHY IS NOT
CONSIDERED CONCLUSIVE EVIDENCE THAT ALL SWATOW-CLASS PGIviS HAVE ONLY TWO
MAIN ENGINES, AT LEAST SOME OF THE UNITS DELIVERED TO THE NORTH VIETNAMESE
NAVY ARE SO EQUIPPED.
4. MISSION READOUT:
ANCHORED ON THE NORTHEAST BANK OF THE RED RIVER. THE BOW AND STERN OF
EACH GUNBOAT ARE CANVAS-COVERED. PERSONNEL ARE OBSERVED ON EACH BOAT,
ALL UTM COORDINATES ARE TAKEN FROM AMS SERIES L701, SHEET 6174 II.
These notes have been prepared for briefing purposes only and should not be used for detailed analytical work. Their use
should be restricted to the particular briefing board(s) they were prepared for and must be considered valid only for the re
porting period as indicated by the date of issue. For information concerning these notes contact Chief, Collateral Support
Division, NPIC.
Approved For Release 20
0 610 311 :
RET
25X1