MODIFICATIONS TO PATROL SHIPS NORTH KOREA (SANITIZED)

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP85T00060R000300160001-4
• Release Decision: RIPPUB
• Original Classification: S
• Document Page Count: 4
• Document Creation Date: December 28, 2016
• Document Release Date: July 21, 2010
• Sequence Number: 1
• Publication Date: December 6, 1984
• Content Type: REPORT

Sanitized Copy Approved for Release 2010/07/21: CIA-RDP85T0006OR000300160001-4
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(Security Classification)
Z-18484/84
NPIC/IEG (12/84))
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(c) NATIONAL PHOTOGRAPHIC INTERPRETATION CENTER
Attachment to Z-18484/84
Copy NPIC/IEG/EAD
6 DECEMBER 1984
1. SIGNIFICANCE: SEVERAL MODIFICATIONS HAVE BEEN IDENTIFIED ON
TWO OF THE LARGER NORTH KOREAN EAST COAST PATROL SHIP CLASSES.
DIFFERENT TYPES OF MAIN GUNS HAVE BEEN INSTALLED ON BOTH THE
T-CLASS AND THE SARIWON PATROL SHIPS (PGF). CURRENTLY, THERE
ARE TWO T-CLASS AND THREE SARIWON PGF IN THE NORTH KOREAN NAVAL
INVENTORY. (SWN)
2. REMARKS: TWO DIFFERENT TYPES OF MAIN GUNS WERE IDENTIFIED ON
THE TWO T-CLASS PGF. AT NAJIN NAVAL BASE ON A T-CLASS 25X1
PGF HAD BEEN MODIFIED WITH THE INDIGENOUSLY-PRODUCED 85MM
TURRET (TANK TYPE) GUN, REPLACING THE SHIELDED 100MM GUN
(SQUARE SHAPED) (GRAPHIC 1). ADDITIONALLY, THE SUPERSTRUCTURE
AFT OF THE STACK HAD BEEN MODIFIED TO ACCEPT TWO MORE 14.5MM
ANTIAIRCRAFT GUNS FOR A TOTAL OF FOUR, AND ONE OF THE THREE
37MM ANTIAIRCRAFT GUNS HAD BEEN REMOVED. (SWN)
A T-CLASS PGF AT MUNCHON UP NAVAL BASE AND SHIPYARD, ON
HAD A ROUNDED, POSSIBLE 30MM GUN MOUNT INSTALLED AS
ITS MAIN GUN. THIS T--CLASS, HOWEVER, HAD RETAINED THE THREE
AFT 37MM AND TWO 14.5MM ANTIAIRCRAFT GUN CONFIGURATION. THE
VESSEL MAY HAVE BEEN AT MUNCHON UP FOR FURTHER MODIFICATION
SINCE IT IS NOT HOMEPORTED THERE. MUNCHON UP IS THE
SOUTHERNMOST FACILITY FOR REPAIR/MODIFICATION OF THIS SIZE
VESSEL. (SWN)
SARIWON PGF MODIFIED WITH TWO DIFFERENT MAIN GUNS HAVE BEEN
OBSERVED NEAR CHANGJON NAVAL BASE AND AT MUNCHON UP (GRAPHIC
2). A SARIWON PGF NEAR CHANGJON, ON HAD THE 25X1
NORMAL SHIELDED 85MM MAIN GUN REPLACED WITH A TWIN 57MM DUAL
PURPOSE GUN. TWO RBU-600 ASW ROCKET LAUNCHERS HAD PREVIOUSLY
BEEN INSTALLED ON THE SARIWON PGF. (SWN)
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 reporting period as indicated by the date of issue.
WARNING NOTICE
INTELLIGENCE SOURCES
OR ME T HODS IN VOL VED
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(c) NATIONAL PHOTOGRAPHIC INTERPRETATION CENTER
Page 2 of 2
Attachment to Z-18484/84
Copy NPIC/IEG/EAD
6 DECEMBER 1984
ONE SARIWON PGF AT MUNCHON UP ONI IHAD ITS MAIN GUN 25X1
CHANGED TO THE INDIGENOUSLY-PRODUCED 85MM TURRET (TANK TYPE)
GUN. A SECOND SARIWON (NOT ON GRAPHIC) WAS BEING MODIFIED IN
THE DRY-DOCK AT MUNCHON UP ON THE SAME DATE. ALL ARMAMENT HAD
BEEN REMOVED, AND THE MAIN GUN MOUNT WAS APPARENTLY BEING
CHANGED TO THE OVAL MOUNT FOR THE 85MM TURRETED GUN. (SWN)
ANALYST'S COMMENTS: IT IS UNCLEAR AS TO WHY THE WEAPONS SUITE
ON THE T-CLASS AND SARIWON ARE BEING CHANGED SINCE THEY DO NOT
SUBSTANTIALLY ALTER OR IMPROVE THE VESSELS' FIREPOWER.
HOWEVER, THESE MODIFICATIONS WILL SIGNIFICANTLY HAMPER THE
IDENTIFICATION AND ORDER-OF-BATTLE MAINTENANCE OF THESE TWO
CLASSES AND OTHER SIMILAR VESSELS. (SWN)
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OORDINATES
42-09-18N
130-11- 48
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OORDINATES
39-18-SIN
127-24- 05
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OORDINATES
38-44-13N
128-11- 38
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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
WARNING NOTICE
INTELLIGENCE SOURCES
OR METHODS INVOLVED
SECRET
Sanitized Copy Approved for Release 2010/07/21: CIA-RDP85T0006OR000300160001-4