ANTIAIRCRAFT WARNING SERVICES

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP80-00810A006500740007-5
• Release Decision: RIPPUB
• Original Classification: S
• Document Page Count: 2
• Document Creation Date: December 21, 2016
• Document Release Date: March 21, 2008
• Sequence Number: 7
• Publication Date: June 17, 1955
• Content Type: REPORT

Approved For Release 2008/03/21 : CIA-RDP80-0081 OA006500740007-5
INFORMATION REPORT
S-E-C-R-E-T
NOFORN
DATE OF INFO.
Antiaircraft Warning Service"s
This material contains Information affecting the Na-
tional Defense of the United States within the mean-
ing of the espionage Laws. Title 18, U.S.C. Secs. 793
and 794, the transmission or revelation of which in
any manner to an unsuthorlaud person Is prohibited
by law.
REPORT
DATE DISTR.
NO. OF PAGES
REQUIREMENT NO.
REFERENCES
THE SOURCE EVALUATIONS IN THIS REPORT ARE DEFINITIVE.
THE APPRAISAL OF CONTENT IS TENTATIVE.
(FOR KEY SEE REVERSE)
17 June 1955
Ii
1. The radar warning system in Czechoslovakia is controlled by the Central Warning
Service (Ustredni hiasna :luzba), which has under its command subordinate warning
services (hlasna,Sluzba). The warning services control both visual warning
stations (vidove hlasky) and radar stations (radarove hlasky),
2. The Central Warning Service is in constant contact with the warning services and
the radar stations by radio. The wave-lengths used are changed daily according
to advance instructions which are issued for a three-month period.. The infor-
mation transmitted to and by the stations '~y radio is encoded. The code book
used has 16 pages. All timings are calculated on Moscow time.
3. The Central Warning Service is in telephonic contact with Moscow.; If a foreign
aircraft crosses the Czechoslovak frontier, orders are at once given to alert
fighter aircraft, and, simultaneously, the information is passed to Moscow, which
is requested to give a decision on the action to be taken.1
4. The HQ of each division also has a warning service which warns the divisional
commander should it receive news that..a group of foreign aircraft are approaching
the Czechoslovak frontier.2
Comment: It is not clear whether the fighters are alerted on the 25X1
ground or actually ordered into the air pending a decision from Mo scob,.
Comment: The use of the word "division" is obscure. It seems clear 25X1
that the military formation is meant, but whether all divisions are,,sO alerted
or only those having an active antiaircraft commitment for a particular area
is not apparent. It is possible that "division" actually means military
district and refers to the normal Ground Observer Corps which would operate
with it.
S-E-C-R-E-T
NOFORN
r STATE X ARMY X NAVY X AIR X FBI AEC
(NOTE: Washington distribution indicated by "X"; Fuld distribution by "#".)
Approved For Release 2008/03/21 : CIA-RDP80-0081 OA006500740007-5
 Approved For Release 2008/03/21 : CIA-RDP80-0081 OA006500740007-5
Approved For Release 2008/03/21 : CIA-RDP80-0081 OA006500740007-5