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TRANSCRIPT
\u2666 N
UNITED STATES PACIFIC FLEET AND PACIFIC OCEAN AREAS
'7
*:.
r—-n»nt2 \ Instructors "Rp^w
•I —— ——
-i~-W.IB.WTW*!
Name __. ±J&*&*--T*"
PROGRESSIVE CONSTRUCTION AND CAMOUFLAGE OF DEFENSE INSTALLATIONS ON IWO JIMA 3UPPL E MINT TO BUIL ET IN RO. 136 45
Gl&aui&QBttk}Jiohuigmi. f
CINCPAC-CINCPOA BULLETIN NO. 137-45
13 1945JUNE^ + *
SEP 271945 k <XC~XL&S
GNCPAC-CINCPOA BULLETIN 137-Jp| Jßffc » m
MO
Foreword hSlttl 2 1 1985
PROGRESS IVE CONSTRUCT lON AND CAMOUFLAGE- " vi : ; ; ,\u25a0 . ... .
'
, / o.f . . '\u25a0 \u0084
DEFENSE. INSTALLATIONS ON
IWO JI MA
PRESENTED IN STEREOSCOPIC PAIRS PREPARED; .I N ;CQJsiaUNCTjON :WITH- 0-2; SECT lON sth- MARINE DlV IS lON
The following photographs of stereo pairs, with descriptions of enemy installations pictured, have been prepared as a supplement to CINCPAC-CINCPOA Bulletin No. 136-45 titled, "Defense Installations on IWO JIMA". The latter publication presents ground photographs and diagrams of the positions presented in this publication as well as many others. It is intended that the two publications be studied in conjunction with each other.
Since previous publications have dealt with most of the antiaircraft defenses, primary consideration has been given to casemated coast guns and covered in-defense fantry and artillery positions. Each installation is shown in the varying stages of construction and camouflage which took place from 15 June 1944, date of first aerial' photographs, to 19 February 1945, date of invasions/ ; : ?
Table of Contents
(H) . 150 mm Mortar Cave Position TA 216 E (SE) 4-5
2 Gun Battery (One 12 cm, One 14 cm) CD Guns TA 216 G (SE) ..... 6-7 2 Gun Battery 15 cm CD Guns TA 216 D 8-9 2 Gun Battery 15 cm CD Guns TA 219 A , . . 10-11 \u25a02 Gun Battery 12 cm Naval Guns (Short) TA 183 X . 12-13 4 Gun Battery 12 cm CD Guns TA 183 ¥ 14-15
4 Gun Battery 14 cm CD Guns at foot of Suribachi TA 132 K,L .... 16-17
3 Gun Battery 12 cm Howitzers TA 217 A . 18-19 Triple Mount 25 mm AA TA 217 L 20-21 Blockhouse TA 181 C (SW) 22-23
Dummy Covered Artillery Emplacement TA 197 V (SE) 24-25
Blockhouse TA IVB V (SE) . . 26-27
Mortar Positions (150 mm and 81 mm) TA 198 X 28-29 Command Post TA 198 C 30-31
Mater Collection and Storage TA 218 V (NY) . 32-33
10 cm Dual Mount Shield Guns TA 217 G ........ 2-3
\u25a0Mortar Positions TA 131 J ............. 34-35 Casemated 12 cm (Short) Naval Gun TA 132 R 34-35 Camouflage TA 163 X . . . . . . . . . . . . . 34-35
"****«*festoon' 1
f ( -**„ '*f
>\u25a0$ f M.M- i&'M-.&:ffi~M "-si. :i.-^te PROGRESSIVE ;GONSTRI^gO^ D^SE INSTALLATIONS ON IWQ JjMA.
10 cm DUAL MOUNT SHIELD GUNS (W)TA 217 G
Orientation sketch for right member of stereogram #3. Road
\u25a1 Building
Gun positions marked by x, and lettered A, B and D.
CP marked by x, :and lettered Ci i
-Stereogram 7fl. These l^i, June 1944 pictures show the nature of ;the terrain before
construction began. The whitish, irregular area between C and D is a typical water collector; the pipe leading to the storage basin is visible running northerly. .
-Stereogram #2 These. llDecember 1944 pictures show work has begun on the revet
, ments. along., B is the farthest
-Stereogram These 12 January 1945 photos show something in B, and the spiders#3
' of the gun mount in D. The square excavation for the CP is visible \u25a0 \u25a0 '• \u25a0 \u25a0\u25a0\u25a0-\u25a0 \u25a0\u25a0\u25a0\u25a0\u25a0\u25a0 \u25a0 \u25a0\u25a0: . 'at 'c. . \u25a0. . . .
-Stereogram #4 The guns are installed at B and D on these 4 February 1945 photos.
The rectangular object in A is well below ground level in comparison with B and D. Note the rangefinder just southeast of C.
2
4
PROGRESSIVE CONSTRUCTION DEFENSEANDf^OTfl^sGEf|)F INSTALLATIONS ON IWO JIMA. ?CINCPAC-CINCPOA BULLETIN 137-45. M G^JlffilmWff**t
10 cm DUAL MOUNT SHIELD GUNS TA 217 G (W)
STEREOGRAM No. 1
15 MAY 1944 ESSEX 52
SCALE 1/4800 010 1 200'
N
STEREOGRAM No. 2
11 DEC. 1944 VDS-7B
SCALE 1/10,000
010 1 200' N
STEREOGRAM No. 3
12 JAN. 1945 VDS-218
SCALE 1/5500 0' 200
• N
STEREOGRAM NO. 4
4 FEB. 1945 VDS-34C
SCALE 1/4750 010 1 200
• N
JICPOA 50531-204 3
PROGRESSIVE CONSTRUCTION AND CAMOUFLAGE OF DEFENSE INSTALLATIONS ON IWO JIMA CINCPAr-nwrPOA BULLETIN 137-45.
150 mm MORTAR CAVE POSITION TA 216 H (SE)
STEREOGRAM NO. 1
2 SEPT. 1944 CVL 30-20(P)
SCALE 1/5250' N 010 1
-*
STEREOGRAM NO. %
12 JAN. 1945 VDS-218
SCALE 1/6500•0« 200
/STEREOGRAM No. 3
4 FEB. 1945 VDS-34A
SCALE 1/4600 0» 200*
N
,/ -* 4
i
PROGRESSIVE CONSTRUCTION AND f#Ji>JjJiE J|F C^Hlsf pff>fp.|l|pNS ONJWOJIMA. CffUP^CtiCipCPOA BULLETIN 137-45. UILif f\fj|\lIIfT11
150 mm MORTAR CAVE POSITION TA 216 H (SE)
Orientation sketch for right member of stereogram #3. =-Road
11 1 111 1 111 Cliff line
Cave entrances Indicated by x, and lettered A, B, C and D.
The entrances were all connected by a series of intricate passageways that provided cover for the mortars, ammunition storage, and living quarters.
The mortars fined from the cave entrances. v
-Stereogram #1 These 2 September 1944 photos show beginnings of cave entrances.
Note the natural vegetation and absence of large piles of spoil.
-Stereogram #2 These 12 January 1945 pictures show an increase in digging activity.
-Stereogram #3 These 4 February 1945 photos s,how large increase in spoil. Lack
of camouflage would indicate digging was continuing. Amount of spoil indicates extensive works.
's
-\
?;
1,
5
PROGRESSIVE ;CONSTRUCTipN OF DEFENSE INSTALLATIONS ON IWO JIMAAND CAMOUFLAGE 'i CINCPAC-Ifl ivnire,,. .--4
ir
2 GUN BATTERY (ONE 12 cm, ONE 14 cm) CD TA 216 G (SE)
Orientation sketch for right member of stereogram #1.
'""^ /X Road
% ——Pathc a. v(/\.,/Jr I *^ ni1 1 im?&' J "fe"**, S/^«/ M'limCliffuiiiilineline?^ y •>"V..
\u25a0' u'uhi\nC i/o Gun positions Indicated by x, and lettered A and B. , on capture.tf VJ/ n
/>'"% f C and D were empty
-Stereogram #1 These 2 September 1944 photos show minor activity in area, at A
in particular.
-Stereogram §2 These 11 December 1944 photos show much work has been done since
stereogram 1. A has been casemated and camouflaged. B, C, and D appear to be empty.
-Stereogram 43 Shadow definition on these 12 January 1945 photos make A stand out
prominently. B and C have nets stretched over them.
-Stereogram #4 These photos of 4 February 1945 show the gun in B. The tufts of
grass comprising A's camouflage are readily seen. C has a net stretched over it. D is still empty. Ground reconnaissance revealed A to be 140 mm and B to be 120 mm.
6 AyAv
PROGRESSIVE CONSTRUCTION AND CAMOUFLAGE OF DEFENSE INSTALLATIONS ONIW^IMA. >. *
MS;,J *
12 cm and 14 cm CD GUNS TA 216 G (SE)
STEREOGRAM NO. 1
2 SEPT. 1944
CVL3O-20(P)
SCALE 1/5250' /0» 200 N
STEREOGRAM No. 2
11 DEC. 1944 VDS-7B
SCALE 1/10,000 0» 200' N
STEREOGRAM No. 3
12 JAN. 1945 VDS-218
SCALE 1/5500 n^^^ 200'0'
STEREOGRAM No. 4
4 FEB. 1945 VDS-34A
SCALE 1/4600 0> 200' N
i JICPOA 50531-206 7
PROGRESSIVE CONSTRUCTION AND CAMOUFLAGE OF DEFENSE CINCPAC-CINCPOA BULLETIN 137-45.
15 cm CD GUNS TA 216 D
N
/N
N
N
/N
INSTALLATIONS ON IWO JIMA QQUHEENTIAT
STEREOGRAM No. 1
4 JUNE 1944 CVI33
SCALE 1/7100 0' 200'
STEREOGRAM NO. 2
2 SEPT. 1944
CVL3O-20(P)
SCALE 1/5550 0
• 200
•
STEREOGRAM No. 3
11 DEC. 1944 VDS-7B
BCALE 1/10,000
010 1 200'
STEREOGRAM NO. 4
12 JAN. 1945 VDS-218
SCALE 1/5500 0« 200'
STEREOGRAM No. 5
4 FEB. 1945 VDS-34A
SCALE 1/4600 0' 200»
8
PROGRESSIVE CONSTRUCTION AND^CAMQUFLAGE OF DEFENSE INSTALLATIONS ON IWO JIMA. CINCPAC-GNCfOA BULLETIN 137-45jf jJ^#S§ M|| n
2 GUN BATTERY 1$ cm CD %U! TA 216 D
I'
vwv^ I Orientation sketch for right member of stereogram #4.=== =Road/'VV l-J
"inn Cliff line Communicatipn trench (wire)
Gun positions Indicated by x, and lettered A- and B
»
-Stereogram #1 These 4 July 1944 photos show the excavation for A. Uncamou
flaged spoil is a giveaway to activity in this area.
--Stereogram §2 These 2 September 1944 photos show A has been camouflaged no
evidence of casemate. There is a excavation at B.rectangular The spoil has been camouflaged with small plants and bushes. -
Stereogram #3 These 11 December 1944 photos show the casemates finished and -camouflaged. Camouflage discipline is good.
-Stereogram #4 This 12 January 1945 photography clearly shows the direction of
fire to be southwestward, covering the 7/est 3each.es • Camouflage has been improved. Shadow definition aids greatly in picking out the installations. Note the shallow communication trench leading in from the south.
-Stereogram §5 These 4 February 1945 photos are included to show how easily the
installations might be overlooked based on this one sortie.
* '*i ' *" '" fr *lJ r r->
9
PROGRESSIVE CONSTRUCTION AND CAMOUFLAGI DEFENSE INSTALLATIONS ON IWO JIMA* \u0084 \u0084CINCPAC-ClNCPO^p.ill|37-^5. >
2 GUN BATTERY 15 cm CD GUNS TA 219 A
Orientation sketch for right member of stereogram #1.===== Road
A "Mil.Cliff line
APP/ Trees£% r% NORTH Gun positions indicated by x, and lettered A and B.**f/ >\ / l/t
-Stereogram #1 These 15 June 1944 photos show two rectangular excavations. A has
a tarp or net over it. B has a ramp to facilitate spoil removal.
-Stereogram #2 These photos taken 4 July 1944 show the two guns in position. No
attempt at camouflage.
-Stereogram #3 These 2-September 1944 photos show guns in position and well camou
flaged bushes have been planted in the spoil and tied onto the guns themselves. At this date the guns have no£ been casemated.
-Stereogram #4 In these 4 February 1945 photos the guns have been completely
casemated and camouflaged. The concrete has been liberally covered with earth. The field of fire is clearly indicated. The battery OP is visible between and about 50* behind the guns. Note the tunnel entrances to the positions. All casemated guns on the island were connected by shallow communication (wire) trench of the type coming in from the west in this stereogram.
-Stereogram #5 These pictures taken 9 February 1945 add nothing to stereogram
#4, but are included to compare the amount of detail shown in photos of about 1/5000 scale and the amount of detail shown in photos of about 1/10,000 scale.
10
PROGRESSIVE CONSTRUCTION AND CAMOUFLAGE OF DEFENSE INSTALLATIONS ON IWO JIMA CINCPAC-CINCPOA BULLETIN 137-45.
5
15
I
cm CD <HJNS TA 219 A
STEREOGRAM NO. 1
15 MAY 1944 ESSEX 52
SCALE 1/6150 0' 200
•
N
4
STEREOGRAM No. 2
JUNE 1944 CVI33
SCALE 1/7250 010 1 200
•
N
STEREOGRAM No.
2 SEPT. 1944
CVL3O-20(P)
SCALE 1/4750
010 1 200'
3
m '
N
STEREOGRAM No. 4
4 FEB. 1945 VDS-34C
SCALE 1/4550 0» 200
•
9
STEREOGRAM No. 5
FEB. 1945 VDS-35C
SCALE 1/9550 010 1 200
• N
JICPOA 50531-208 11
PROGRESSIVE CONSTRUCTION AND CINCPAC-CINCPOA BULLETIN 137-45.
CAMOUFLAGE OF DEFENSE INSTALLATIONS ON IWO JIMA. CONFIDENTIAL.
12 cm NAVAL GUNS TA 183 X
(SHORT)
N
STEREOGRAM No. 1
15 MAY 1944 ESSEX 52
SCALE 1/5050
0« 200 •
N STEREOGRAM No. 2
2 SEPT. 1944 CVL3O-20(P)
SCALE 1/5400 0
• 200 \u25a0
N M^^^^^^h\-\%^^L 4MM||
STEREOGRAM No. 3
12 JAN. 1945 VDS-21A
SCALE 1/4850 0' 200'
N STEREOGRAM No. 4
4 FEB. 1945 VDS-348
SCALE 1/4800 0
• 200
'
m311 \u25a0*
N 9
STEREOGRAM
FEB. 1945
No. 5
VDS-358
12
|)£cSnSEPROGRESSIVE AND^IA^buFLjS(i (" INSTALLATIONS ON IWO JIMA.CONSTRU^R^ JCIN?PAG-#lb|gPOA BwfofWsl W-45s ijyit fJ f|HBHBH|
2 GUN BATTERY 12 cm NAVAL GUNS (SHORT) TA 183 X
Orientation sketch for right member of stereogram #1.•*%//\u25a0 >/ I
north iii«iithi Cliff line
4£ **-A Gun positions indicated by x, and lettered A and B.
&, ¥\ -
Stereogram #1 These photos taken 15 June 1944 show littleactivity at the gun sites.
-Stereogram #2 These photos taken Z September 1944 show much activity at A and
B. Brush has been cleared. There is possibly a gun at A.
-Stereogram #3 In these 12 January 1945 pictures both casemates have been com
pleted and well camouflaged. B is much easier to pick out than A using stereogram #3 above, but by comparing #3 with #2 both are readily discernible.
Stereogram #4 -In these 4 February 1945 photos, B is readily seen. Its flreport stands out prominently. Due to the quality of the prints, Ais hard to distinguish.
-Stereogram #5 Both A and B are easily seen on these 9 February 1945 photos.
Note the amount of vegetation that has been cleared from the plateau between #1 and #5.
v
V
13
is iJ~'
PROGRESS^ terffT|UCTION AND CAMOK OF DEFENSE INSTALLATIONS ON IWO JIMA ' s .{.
*CINCPAC-ClNCPoMlliHfii j
~M
4 GUN BATTERY 12 cm TA 183 W
CD GUNS
V w
APR,
"/NORTH / n
Orientation sketch for right member of stereogram #1. :=: =—
Road y
'""nilcliff,line d House
Gun positions indicated by x, and lettered A, B, C and D.
-3tereogram #1 These photos taken 15 June 1944 clearly show activity at B, C
and Din the form of circular excavations. A does not show much activity. -
Stereogram #2 These photos taken 2 September 1944 show much improvement in camouflage. There are no casemates built at this time. -
Stereogram #5 These photos taken 12 January 1945 clearly show well camouflaged casemates in all four locations. A, B and G are easily discernible. D can readily be verified by comparing stereogram #3 with stereogram #1. Stereogram #1 shows location Das a hole in the cliff; stereogram #3 shows it filled in. -
Stereogram #4 These photos taken 4 February 1945 show all four casemates clearly.
-Stereogram #5 These photos taken at 20,000 feet on 9 February 1945 show all
four casemates clearly.
Progress in camouflage discipline as shown in this stereo setup is characteristic of the whole island. Note how the houses have been toned down. Note how the water catch basin 50 feet west of B has been camouflaged with brush and stones to break up the outline of the cement drainage area. .
14
CINCPAC-CINCPOA BULLETIN 137-45. fcQNRDENTIAC
12 cm CD GUNS TA 183 W
15
STEREOGRAM NO. 1
MAT 1944 ESSEX 52
SCALE 1/5050
0 « 200 ' N
STEREOGRAM No. 2
2 SEPT. 1944 CVL3O-20(P)
SCALE.1/5400 0« 200 1
N
/
STEREOGRAM No. 3
12 JAN. 1945 VDS-21A
SCALE 1/4850 0' 200 1
STEREOGRAM NO. 4
4 FEB. 1945 VDS-348
SCALE 1/4800 0« 200'
STEREOGRAM N0. .5
9 FEB. 1945 VDS-358
SCALE 1/9600 0« 200 1 N
15
PROGRESSIVE CONSTRUCTION AND
CINCPAC-CINCPOA BULLETIN 137-45.
CAMOUFLAGE OF DEFENSE INSTALLATIONS ON IWO JIMA.
14 cm CD GUNS TA 132 X, L
24
STEREOGRAM NO. 1
MAY 1944 ESSEX 52
SCALE 1/5950
0' 200'
STEREOGRAM No. 2
4 JUNE 1944 CVI33
SCALE 1/7250
010 1 200'
STEREOGRAM NO. 3
SEPT. 1944 VD4-87A
SCALE 1/10,000
0' 200'
N
STEREOGRAM No. 4
JAN. 1945 VDS-218
SCALE 1/5450 0 ' 200
STEREOGRAM No. 5
FEB. 1945 VDS-34D
S.CALE 1/4650 0« 200'
STEREOGRAM No.
3 FEB. 1945
28PR5MC21-1 ALT. 100 FT.
6
••' . :iS16 * \
\u25a0
PROGRESSIVE CONSTRUCTION AND CAMOUFLAGE OF DEFENSEJ^gALLATIONS ON IWQ JIMA. CINCPAC-CINCPOA BULLETIN 137-45. «r If
4 GUN BATTEHY US tm CD GUNS AT FOOT OF SURBACPII YAMA TA 132 X, L
Orientation sketch for right member of stereogram #1.=-Road
££Trees iiiiiiiiiCliff
Gun positions indicated by x, and lettered A, B, C and D.
-Stereogram #1 These photos taken 15 June 1944 show four clearings in the trees.
Ground location would provide good coverage of approaches to East and West Beaches.
-Stereogram Photos taken 4 July 1944 show that work is progressing in the#2 -
four clearings they are enlarged spoil has been removed.
-Stereogram #3 Photos taken 1 September 1944 show concrete, uncamouflaged case
mates in gun positions A and B, and a gun on concrete pedestal in gun position C. Position D is awaiting its gun.
-Stereogram ,/4 These photos taken 12 January 1945 show all four positions com
pleted. Dirt covers the concrete. The natural camouflage is particularly effective in these photo3taken during bright sunlight. Possible AW weapons are noted on B, C and D.
-Stereogram £5 These .excellent photos taken 4 February 1945 clearly show the
nature of the positions. Dirt has been mounded up over the concrete, vegetation planted on it. The fire ports and directions of fire are clearly visible. Each emplacement definitely has an AW on top of it. Ground reconnaissance showed the AW to be 25 mm dual mount. Photos taken under a 14,000* overcast.
-Stereogram #6 These 3 February 1945 obliques show how effectively camouflaged
C and D are, Note the twin fire slits on the rocky outcrop above and to the west of D.
f r^K
* fcHAiSts
17
PROGRESSIVE CONSTRUCTION AND CAMOUFLAGE OF DEFENSE INSTALLATIONS ON IWO JIMA. fINCPAC-CINCPOA BULLETIN 137-45.
3 GUN BATTERY 12 cm HOWITZERS TA 217 A
| Orientation sketch for right member of stereogram #3. Road
Trail
uiuijrCliff "••••-• Trench/" '7 i
B C J Gun positions are shown by x, and lettered A, B and C. APP. NORTH
-Stereogram //I These 2 September 1944 pictures are included to show the nature of
the terrain and the absence of installations.
-Stereogram #2 These 11 December 1944 photos clearly show a short section of trench.
Due to poor fields of fire offered by the terrain, suspicion is aroused as to the use of the trench.
-Stereogram By carefully comparing these 4 February 1945 pictures with stereogram
jfl, it is obvious that installations have gone in at A, B, and C. For instance, C shows in §1 as open ground; in $2 there is a mound reached by the communications trench.
18
CINCPAC-CINCPOA BULLETIN 137-45.
12 cm HOWITZERS TA 217 A
STEREOGRAM No. 1
2 SEPT. 1944
CVL3O-20(P)
SCALE 1/5450 010 1 200'
STEREOGRAM NO. 2
11 DEC. 1944 VDS-7B
SCALE 1/10,000
0' 200'
STEREOGRAM No. 3
4 FEB. 1945 VDS-34A
SCALE 1/4600' •0 200
-X
JICPOA 50531-212 19
PROGRESSIVE CONSTRUCTION AND CAMOUFLAGE OF DEFENSE INSTALLATIONS ON IWO JIMA CINCPAC-CINCPOA BULLETIN 137-45.
4 TRIPLE MOUNT 25 mm AA
TA 217 L
STEREOGRAM NO. 1
11 DEC. 1944 VDS-7B
SCALE 1/10,000
0» 200' N
STEREOGRAM NO. 2
12 JAN. 1945 VDS-218
SCALE 1/5500 0» 200'
N
STEREOGRAM No. 3
4 FEB. 1945 VDS-34C
SCALE 1/4750 0» 200*
N
20
PROGRESSIVE CONSTRUCTION AND CAMOUFLAGE OF DEFENSE INSTALLATIONS ON IWO JIMA. 't,CINCPAC-CINCPOA BULLETIN 137-45. 4tfHHHHHI
fi
Mtji f / *
\u25a0H mm. AA \
" v v /
%is& m'
\u25a0y » If , .^>
| Orientation sketch for rignt member of stereogram
* * * #3.
Truck,
X 25 mm single mount
® 25 mm triple mount
LJ revetment
© * APR NORTH
-J
The three stereograms offer a comparison between single and triple mounts at various scales and light conditions. It is probable that the triple mount was salvaged from one of the beached Jap LSTs on the ifiast Beach.
21
PROGRESSIVE CONSTRUCTION AND CAMOUFLAGE OF DEFENSE INSTALLATIONS ON IWO J!MA. i^NiPAC-CINCPOA BULLETIN 137-45. \u25a0\u25a0\u25a0MM*
1 \ 1l fa* m *&m
PfcWKHOtJSB-TA 181 C (SW)
-Stereogram #1 These 2 September 1944 photos show the nature of the terrain.
Note the hasty trench system.
-Stereogram §2 These 18 November 1944 obliques show a large mount of excavated
earth at A.
-Stereogram #3 These 11 December 1944 photos show A near completion. There are
two fire-ports firing north. The westernmost port accommodated a47mm the easternmost a 7.7 am MG, Note the excavation at B with concrete base already poured.
-Stereogram £4 These 12 January 1945 photos show A completed. Note the OP on
top of the 7.7 MJ Position of the blockhouse. The large pile of sand to seaward would have provided much protection from direct hits by NGF. B's walls are being built as evidenced by the forms in these pictures. Note the pillbox between A and B firing west.
-Stereogram #5 These 3 February 1945 obliques clearly show A and B finished with
two pillboxes in betv/een.
-Stereogram #6 These 4 February 1945 photos merely present a complimentary ver
tical shot of stereogram #5.
j , {} !«uK if^ (^> n lT *
/ 22
PROGRESSIVE CONSTRUCTION AND CAMOUFLAGE OF DEFENSE INSTALLATIONS ONJ^OJIM^ CINCPAC-CINCPOA BULLETIN 137-45. -^CONFIDENTIAL.
STEREOGRAM No.
2 SEPT. 1944
CVL3O-20(P)
SCALE 1/5900 0' 200
'
1
18
STEREOGRAM NO. 2
NOV. 1944 28PR4MC171-2
ALT. 50 FT.
i
--I ' f
STEREOGRAM NO. 3
11 DEC. 1944 VDS-7A
SCALE 1/10,000
0' 200' \
N
STEREOGRAM NO. 4
12 JAN. 1945 VDS-218
SCALE 1/6000 0' 200'
STEREOGRAM No.
3 FEB. 1945
28PR5MC21-6
ALT. 50 FT.
5
STEREOGRAM No. 6
4 FEB. 1945 VDS-34C
SCALE 1/4950
0« 200 '
s.
N
JICPOA 50531-214 23
PROGRESSIVE CONSTRUCTION AND CAMOUFLAGE OF DEFENSE INSTALLATIONS ON IWOJIMA. CINCPAC-CINCPOA BULLETIN 137-45. CONFIDENTIAL.
DUMMY COVERED ARTILLERY EMPLACEMENT TA 197 V (SE)
STEREOGRAM No. 1
12 JAN. 1945 VDS-218
SCALE 1/6000 0' 200'
STEREOGRAM No. 2
3 FEB. 1945
28PR5MC21-6
ALT. 50 FT.
STEREOGRAM No. 3
4 FEB. 1945 VDS-34C
SCALE 1/4950
0« 200*
N
24
PROGRESSIVE CONSTRUCTION AND CAMOUFLAGE OF DEFENSE INSTALLATIONS Ohnjj^JM^,CINCPAC-CINCPOA BULLETIN 137-45.
lla.i^jEL m« 0% Ht^llff*S% DUMMY COVERED ARTILLERY EMFIJ&EBOTT *\ P\u25a0%l $ F|
T (SE)TA 197
Orientation sketch for right member of stereogram #1. Road
A—*-"S^ Trenches • _
••'
APP. .-•'
.•'\u25a0* i
„ Dummy covered artillery emplacement andand letterletter A.A. TwoTwo dummydummy pillboxespillboxes
indicated by atat BB andand C.C.
z
NORTH.• " C
\ -Stereogram #1 These photos of 12 January 1945 show the trenches to be shallow
affairs. Two dummy pillboxes, just mounds of sand with boxes for fireports, are shown at B and C. A has not been constructed yet.
-Stereogram $2 These 3 February 1945 obliques clearly show the flimsy nature of
A. B is clearly discernible as a pile of sand.
-Stereogram #3 These 4 February 1945 photos show that the sand covering A had been
scooped up from near the walls. The trenches are mere traces, due to the fact they were hastily dug in mid-1944 and to the desert-like drifting qualities of the sand. At the time of landing, these installations would serve only as decoys.
PR
25
M?* ""7 •
lltl* . ?,;al Bra 1
PROGRESSIVE CONSTRU||jq^ CAMOUFLAGE OF DEFENSE INSTALLATIONS ON IWO JIMA. f CINCPAC-CINCPOA BULLETIN 137-45.
BLOCKHOUSE 198 V (SE)
for right member of stereogram
Blockhouse indicated by 0; flrelanes designated as Orientation sketch #2.
_APP. one and two. -. NORTH The period of blockhouse construction on the island was
covered photographically by small scale, non-stereo,bombing run photos. The first good stereo coverage ,of
FIRELANE/ '\^\ this blockhouse was the sortie from which stereogram #1ONE FIRELANE was taken. TWO
-Stereogram #1 These 11 December 1944 photos show the blockhouse nearlng _ completion. The fields of fire cut in the earth are a dead
giveaway.
-Stereogram #2 Camouflage has been improved in this 12 January 1945 coverage.
-Stereogram #3 These 3 February 1945 obliques are looking up firelane two. Note
the small trees attempting to camouflage the broad firelane. Note low wire and pillboxes in foreground.
*
26
PROGRESSIVE CONSTRUCTION AND CINCPAC-CINCPOA BULLETIN 137-45.
CAMOUFLAGE OF DEFENSE M
ON IWO JIMA.
CONFIDENTIAL. • -
\u25a0
'\ iri
T
BLOCKHOUSE -i
198 V (SE) 7
27
PROGRESSIVE CONSTRUCTION AND CAMOUFLAGE OF DEFENSE INSTALLATIONS ON IWO JIMA. CINCPAC-CINCPOA BULLETIN137-45. CONFIDENTIAL.CONFIDENTIAL.
MORTAR POSITIONS (150 mm and 81 mm)
\STEREOGRAM No. 1
11 DEC. 1944 VDS-7A
SCALE 1/10,000
N 0» 200'
STEREOGRAM No. 2
12 JAN. 1945 VDS-218
SCALE 1/6000• '
0 200
STEREOGRAM No. 3
4 FEB. 1945 VDS-34C
SCALE 1/4950• 010 1 200
i «
28
PROGRESSIVE CONSTRUCTION AND CAMOUFLAGE OF DEFENSE INSTALLATIONS ON IWO JIMA*CINCPAC;CINCPOA BULLETIN 137-45. CONFIDENTIALCONFIDENTIAL
"** MORTAR POSITIONS (150 mm *afn<t 81 M)' \
**'? TA 198 X
Orientation sketch for right member of stereogram #3. Road
//
O Finished 150 mm mortar positions IIn*
D II % D Excavations for 150 mm mortar positions
»**- X 81 mm mortar positionsAPR
* \QNORTH o
-Stereogram #1 Photos taken 11 December 1944 reveal no military activity.
-Stereogram -#2 These 12 January 1945 photos show a road into the area, and three
rectangular excavations. The two southern excavations show possible concrete construction begun.
-Stereogram #3 Photos taken 4 February 1945 show high angle ports of two completed
150 mm emplacements, distinguishing them from covered artillery emplacements. No 150 mm mortars were found in these installations. The 81 mm mortar emplacements have nets with a hole cut in them to allow the shell to pass. Since 81 mm mortars in these open emplacements were not moved into the finished 150s, it is assumed the latter were intended for a weapon larger than an 81 mm.
29
PROGRESSIVE CONSTRUCTION AND CAMOUFLAGE OF DEFENSE INSTALLATIONS ON IWO JIMA."**" CINCPAC-CINCPQA p-IJM™MM5-g% \u25a0; 7\ J| I"f%
ifhWlal COMMAND POST TA 196 C
\ ~~~) Orientation sketch for right member of stereogram #1. Road
\ * \ CP location Indicated by x.APR\ NORTH N>
L_ J
High altitude, small scale, non-stereo pictures disclosed the beginnings of this installation as a large excavation. Sven without stereo it was evident that much concrete was poured. In Stereograms #2 and #4* the narrow gauge railroad with pushcar used to cover the concrete is evident. Note the four entrances.
Sis
30
PROGRESSIVE CONSTRUCTION AND CAMOUFLAGE OF DEFENSE INSTALLATIONS CINCPAC-CINCPOA BULLETIN 137-45. CONFIDENTIAL.
COMMAND POST TA 198 C %
* 3 .*
STEREOGRAM No. 1 \u25a0
11 DEC. 1944 VDS-7A
SCALE 1/10*000
010 1 200" N
STEREOGRAM NO. 2
12 JAN. 1945 VDS-218
SCALE 1/6000 010 1 200'
STEREOGRAM No. 3 V
3 FEB. 1945
28PR5MC21-6 H N
ALT. 50 FT.
STEREOGRAM NO. 4
4 FEB. 1945 VDS-34C
SCALE 1/4950'
010 1 200
N
JICPOA 50531-218 31
PROGRESSIVE CONSTRUCTION AND CAMOUFLAGE OF DEFENSE INSTALLATIONS ON IWOJIMA m-MiiViCINCPAC-CINCPOA BULLETIN137-45
WATER COLLECTION AND STORAGE TA 218 V (NW)
STEREOGRAM No. 1
15 May 1944
ESSEX 52
SCALE 1/4750
0' 200'
STEREOGRAM No. 2
2 SEPT. 1944
CVL3O-20(P)
SCALE 1/5000•0» 200
3
4 FEB. 1945 VDS-34C
SCALE 1/4650 0» 200 1
STEREOGRAM No.
32
PROGRESSIVE CONSTRUCTION AND CAMOUFLAGE OF DEFENSE INSTALLATIONS ON IWO JIMA.' &NCPAOCINCPOA BULLETIN 137-45. **\u25a0\u25a0\u25a0\u25a0\u25a0
WATER COLLECTION AND STORAGE TA 218 V (NW)
for right memberOrientation sketch of stereogram fl
-Stereogram tf-1 These 15 June 1944 photos clearly show the nature of the device.
A small knoll has been cleared off, slope established towards the east, with a catch basin at the foot. The white appearance is due to the half inch layer of concrete over the water shed area.
-Stereogram jj-2 These 2 September 1944 photos show the installations to be camou
flaged with brush and stones. Between 15 June and 2 September all buildings and water sheds were toned down in this manner. These camouflaged water sheds were often confused with camouflaged nets.
-Stereogram #3 These 4 February 1945 photos reveal a direct bomb hit on the in
stallation.
\
xr-\.
33
PROGRESSIVE CONSTRUCTION AND CAMOUFLAGE OF DEFENSE INSTALLATIONS ON IWO JIMA.
CINCPAC-CINCPOA BULLETIN 137-45. WKHKKMMKK& *
MORTAR POSITIONS TA 131 J
Positions referred to are the six clover leaf affairs arranged in a slight are. The installations were so destroyed by naval gunfire and artillery that it was hard to positively identify them. 150 mm mortar ammunition was nearby.
CASEMATSD 12 cm (SHORT) NAVAL GUN TA 132 R
This casemated 12 cm (short) naval gun, Indicated on the map as a covered artillery emplacement, is shown in the center of Stereogram #1. Camouflage consists of heaping beach stones up over the concrete. Stereogram #2 gives a "downthe-throat" view of the installation. Note the effectiveness of the cover over the fire port. The caves seen in the background are a few of those honeycombingSuribachl.
CAMOUFLAGE TA 163 X
This oblique stereopair shows a covered artillery emplacement camouflaged with grass tufts. Actually the regularity of the grass tufts makes the installation more conspicuous. The field of fire cut in the bank is a dead giveaway.
34
PROGRESSIVE CONSTRUCTION AND CAMOUFLAGE OF DEFENSE INSTALLATIONS ON IWO JIMA.
CINCPAC-CINCPOA BULLETIN137-45.
MORTAR POSITIONS TA 131 J
STEREOGRAM No. 1
4 FEB. 1945 VDS-34D
SCALE 1/4650 0» 200' N
CASEMATED 12 cm (SHORT) NAVAL GUN TA 132 R
STEREOGRAM No. 1
4 FEB. 1945 VDS-34D L*i| SCALE 1/4650 i•
0' 200 N
STEREOGRAM No. 2
3 FEB. 1945 28PR5MC21-1 N
ALT. 100 FT.
\u25a0H
CAMOUFLAGE TA 163 I
STEREOGRAM NO. 1
18 NOV. 1944 28PR4MC171-2 N
ALT. 50 FT.
>
35
PROGRESSIVE CONSTRUCTION AND CAMOUFLAGE OF DEFENSE INSTALLATIONS ON IWO JIMA. CINCPAC-CINCPOA BULLETIN 137-45.
''" "\u25a0'
"'•' ""$ '"'Jsw' I*i. til !, "..,'.•' H:1 „' SSS gJIJ'
UNITED STATES PACIFIC FLEET AND PACIFIC OCEAN AREAS
MCH/md HEADQUARTERS OF. THE COMMANDER IN CHIEF
CONFIDENTIAL
-13 June 1945 Serial DIS-131300
From: Commander in Chief, U. S. Pacific Fleet and Pacific Ocean Areas. To: Distribution List.
Subj ect CINCPAC-CINCPOA Bulletin No. 137-45. Progressive Construction and Camouflage of Defense Installations on IWO JIMA.
Enclosure (A) Subject publication.
1.1. Enclosure (A), forwarded herewith, need not be reported and when no longer of value should be destroyed. No report of destruction is necessary.
1
By direction.
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