AIRCRAFT ATTRITION RATES BY AREA

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78S02149R000100190009-1
• Release Decision: RIPPUB
• Original Classification: T
• Document Page Count: 2
• Document Creation Date: December 12, 2016
• Document Release Date: April 16, 2002
• Sequence Number: 9
• Publication Date: June 8, 1967
• Content Type: MEMO

OS
25X1
1
Approved For R? 203E igglga 00190009-1
review(s) completed.
REMORA=4 Fog Tng OZPLITY SECRETARY OF DEFENSE
SUI1JECT; Aircraft Attrition Rates by Area
Attrition rotes recently quoted for the heavily defended area
around iionol and Haiphong halm caused comment because the area Involved
wasn't stated. CIA says that attack sorties In that
area hod a loss rate or .1.74 in the first four months of this year; the
DM on Alternative Military Actions, dated 19 May, used a figure of one
1053 ovary 40 sorties (i.e., 2.5). Tho 4C$ reaction, I understand,
that the 10$* rat is only
In reply refer to;
' I-35611/67
TM 4S objection Is well -taken If the "heavily defended area" is
takeh to moan all of Route Packages 5 and 6. The table using Silverman's
new 4:Aci that cover 1 Oct 1966 through 31 May 1967, shows a rata of 10.4
per thousand (1.04) for RP's 5 and 6 comOlned. There has been soae
condom variation but no trend, so that the figure for 1967 Mono would be
a4out to same. The table shows other rates 'for comparison.
Xosl Rates In pit'
) Oct 444 a" HO
Arca or
1
2
3
4
5
4
out4
Wrth of ZO'
RP's5-6
1967
1.94..U.'e...t Isam pss it,te,per jol
31,42'9 34 1,1
6,2(43 4 0.6
C.461 23 2.6
7,242 13 2.5
2.7
S,234. 54 15.1
70 1.4
3,000 , 11Z 8.5
103 10.8
tiva c.)nzazted CIA and learned that the area they referred to In
thcir u,zaJ in earlier Studies that gave tile nugloor uscd in the DM&
15 in the circles around Hanoi and Holphon9. These two, circles contain
heavy (jun cc;necntrations, and 4ra expensive to attack; 1 am_sure the ;IA
,
fkwaes are oik? altnou5h $ have not repeated their arithrlic.
_
Johzi 34oNaushton Gopy nf ;7- Colges
"JA551.5tant Secrotary of DerenIi /
Pe ,/ ? .of
Prep; Dr Dailey, 0A5D(SA)
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1..L1r,U-,ITI'4Ya, DOD DI R 200,1Q
50511, tcf, 3junb7
? Rt.; file; embk; ASD(ISA); Mr Enthoven; Mr Hand
91 A ? -7 w..yg
Cl-RD
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900110A) COUi,
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41.15,14,61511, l'111.1M,,1141,1 .
Approved For Release 2002/08/06 : CIA-RDP78S02149R000100190009-1
Copy Office of the Secretary
MPX1RANDUM FOR:
7 June 1967
Appended is Dr. Bailey's
"clarification of figures" memo,
for note byl I et al.
/s/
Frank Hand
(DATE)
FORM NO. 101 REPLACES FORM 10.101
1 AUG 54 ' WHICH MAY SE USED.
(47)
Approved For Release 2002/08/06 : CIA-RDP78S02149R000100190009-1