COASTAL DEFENSE ARTILLERY SITE 2 NGOC LAM, NORTH VIETNAM

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP79-00849A000500010006-2
• Release Decision: RIPPUB
• Original Classification: C
• Document Page Count: 4
• Document Creation Date: December 28, 2016
• Document Release Date: February 24, 2006
• Sequence Number: 6
• Publication Date: October 4, 1966
• Content Type: REPORT

-;approved For Release 2006/03/16 : CIA-RDP99`OJPISN3J6900010006-2
(c) NATIONAL PHOTOGRAPHIC INTERPRETATION CENTER
COASTAL DEFENSE ARTILLERY SITE 2
NGOC LAM, NORTH VIETNAM
1905N 10541E
ATTACHMENT TO L-1992
04 OCTOBER 1966
PAGE 1
1. SIGNIFICANCE:
THIS BRIEFING BOARD DEPICTS A NEWLY IDENTIFIED OCCUPIED COASTAL
DEFENSE ARTILLERY SITE IN NORTH VIETNAM.
2. LOCATION:
THIS SITE IS LOCATED 0.2 NM NORTHWEST OF NGOC LAM AT UTM WG737107,
AND 0.5 NM WEST OF NGOC LAM COASTAL DEFENSE ARTILLERY SITE 1.
3. REMARKS:
RECENT PHOTOGRAPHY HAS REVEALED SEVERAL NEWLY IDENTIFIED COASTAL
DEFENSE ARTILLERY SITES ALONG THIS SEGMENT OF THE NORTH VIETNAM COAST.
THE NUMBER OF SITES THAT HAVE BEEN PREVIOUSLY IDENTIFIED, TOGETHER
WITH THE CONTINUOUS CONSTRUCTION ACTIVITY ON NEW SITES, INDICATE THAT
THE NORTH VIETNAMESE ARE DEVELOPING THEIR COASTAL DEFENSE CAPABILITY
IN THE AREA.
4. MISSION READOUT:
I VEALS THE COASTAL DEFENSE ARTILLERY
SITE TO BE UNOCCUPIED.
I ALS THAT TWO OF THE COASTAL
DEFENSE ARTILLERY POSITIONS ARE OCCUPIED BY PROBABLE 130-MM FIELD
GUNS (M-46)?
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.
Appr se 2006/03/16 : CIA-RDP79-00849A000500010006-2 NGA review(s) completed.
CONFIDENTIAL
 -.Approved For Release 2006/03/16: CIA-RE?IIIfdOWa+M000I0006-2
ATTACHMENT TO L-1992
04 OCTOBER 1966
PAGE 2
5. COLLATERAL:
THE 130-MM FIELD GUN IS A MODERN DESIGN PIECE, BASED ON THE SOVIET
NAVAL GUN OF THE SAME CALIBER. IT IS SUPERIOR IN MOBILITY AND
PERFORMANCE TO THE 122-MM FIELD GUN M 1931/37. IN ADDITION TO BEING
EMPLOYED AS MEDIUM FIELD ARTILLERY, IT COULD ALSO PERFORM MISSIONS
AGAINST ARMOR. CERTAIN FEATURES OF THE CONSTRUCTION, SUCH AS THE
HORIZONTAL SLIDING WEDGE BREECHBLOCK, AND THE DETACHABLE SPADES, SHOW
GERMAN DESIGN INFLUENCE.
ALTHOUGH BEARING SUPERFICIAL RESEMBLANCE TO OTHER ARTILLERY PIECES,
THERE ARE FEATURES WHICH PERMIT EASY RECOGNITION. THE RECOIL CYLINDER
IS LOCATED ABOVE THE TUBE, WHICH IS WITHDRAWN' FROM BATTERY DURING TRAVEL.
A LARGE COLLAR IS PROMINENT AROUND THE TUBE FORWARD OF THE SHIELD. IN
FIRING POSITION THE RECOIL CYLINDER IS ATTACHED TO THIS COLLAR. THE 25X1
MUZZLE BRAKE IS OF THE "PEPPER POT" MULTI-PERFORATED TYPE.
THE GUN TUBE ITH A TOTAL GUN LENGTH
IN TRAVEL POSITION. THE ELEVATION RANGES FROM -2.5 DEGREES TO +45 DEGREES
WITH A TOTAL TRAVERSE OF 50 DEGREES. THE MAXIMUM HORIZONTAL RANGE IS
27,000 METERS AND THE MAXIMUM RATE OF FIRE IS SEVEN TO EIGHT ROUNDS
PER MINUTE.
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.___,__,._
 NATIONAL PHOTOGRAPHIC INTERPRETATION CENTER
r CONFIDENTIAL COASTAL DEFENSE ARTILLERY SITE 2
Approved For Release 2006/03/`1B t-
N R A' .00W QWOVIIftAM
C. 119-05N IV 105-42E