TECHNICAL DESCRIPTION OF RADAR EQUIPMENT DEVELOPED AT VEB FUNKWERK KOEPENICK

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP80-00810A005000820008-1
• Release Decision: RIPPUB
• Original Classification: S
• Document Page Count: 5
• Document Creation Date: December 20, 2016
• Sequence Number: 8
• Content Type: REPORT

This material contains information electing the Na-
tional Defense of the United states within the mean-
INFORMATION REPORT leas of the ~1anag. Lan Title it U.S.C. secs. 7a7
and 7N, the transWnlon or revelation of which in
any manner to an unauthorised person to prohibited
by law. 25X1
SECRET`IT.S. OFFICIALS ONLY
COUNTRY East Germany REPORT
SUBJECT Technical Description of Radar DATE DISTR.
Equipment Developed at VEB Funkwerk
Eoepenick NO. OF PAGES
THE SOURCE EVAWATSO NS IN THIS REPORT AN OEPINITIVE.
THE APPRAISAL OP CONTENT 15 TENTATIVE.
(NM KEY SEE REVERSE)
The following are the technical requirements for radio position-finding
instruments, development order K 4,51:
A. Electric requirements
1. The radio position-finding instrument for navigation purposes is intended
for installation on maritime vessels to permit navigation in coastal waters
and narrow passages (harbors, river mouths, and navigation channels), as
well an navigation in busy shipping routes and in icebound waters. Anti-
collision devices (Eollisionschutzgeraete) which do not meet the most
important requirements may be utilized only as warning devices against
collision with large vessels and objects encountered in open sea lanes
or routes where there is a small amount of marine traffic.
2. The radio position finding instrument must guarantee an uninterrupted view
of the entire horizon in an azimuth of 360? around the ship, together with
the possibility of changing over to observation in one direction or
observation of a narrow sector.
3. The equipment set up on vessels must guarantee a clear picture of land
features (shoreline elevation 70 meters high or higher) at a distance of
20 miles and also a clear picture at a distance of 7 miles of a shoreline
elevation of 7 meters or higher. The acme is required for the detection
of vessels of a displacement of 5,000 tons and up at distances up to 7
miles. Commercial ships with a displacement of 15 tons and up, as well
as Class II buoys, must be detected at distances up to 3 miles.
4. The equipment must be designed so that all radar targets remain visible
when the vessel lists up to plus or minus 100.
 Approved For Release 2007/09/04 : CIA-RDP80-0081OA005000820008-1
5. The radio position-finding instrument must meet the following minimum require-
ments as far as its resolving power is concerned:
a. Minimum diance. An object must bedetStted at aminimut distance of
90 Efforts should be made to reduce t&,,
ulc; n a wig,
reducing the other operational requirements to be met by the equipment.
b. Multiple target discrimination. Two objeetr 'Ai ,h nre separated by 30 or
more in azimuth nnd'which are at least 90 meters apart must appear as
two separate targets on the plan position indicator.
c. Selectivity (Trennschaerfe) in the distance. Two objects which are at
least 90 meters or more apart and of the same azimuth must appear as
separate targets on the shortest range setting.
6. In the case of the largest range setting the indication of the distance to
any object must not be in error more than 5% of the actual distance.
7. At least 3 scales must be provided for. The scale radius of the largest scale
must correspond to a maximum distance of 1 to 2 miles (sic).
8. An automatic drive of the course scale in the remote compass indicator must be
provided for. In the case of the failure of the automatic drive, manual
setting of the compass course scale must be possible.
9. It must also be possible to orient the radar azimuth scale on the longitudinal
axis of the vessel.
10. The error in azimuth (as indicated on the picture tube) of two adjacent reflected
pulses (targets) must not exceed 10.
11. Provisions must be made on the scale of the indicating device (picture tube)
(Anzeige Geraet) for determining the azimuth of course (Kurswinkel) and direction
(Anpoilung) from the ship of any object. The error in the case of direction
finding for a target located at the outer edge (Aussenrand) of the picture tube
must not exceed 1 .
12. The possibility of shifting the zero point on the indicator must be provided.
(Die Moeglichkeit einer zuegigen Aenderung der Groesse des Nullkreisdurch-
messors muse vorgesehen sein).
13. Clutter on the picture tube produced by reflections from water waves must be
kept to a minimum.
14. In addition to the basic equipment and the main indicating device, it is
recommended that provisions be mad- for remote indicators.
15. The indicating devices must be equipped with the necessary controls for viewing
targets properly. The diameter of the picture tube of each indicating devict
must be at least 23 cm. It is desirable that, in the case of the radio
position finding instrument, a projection and representation upon maps be
provided for. The projection of the map should not be less than 23 cm. A
projection installation (Projektionsanlage) should be provided to coordinate
the represent do on the picture tube of the indicating device and a normal
navigation chart. The possibility of changing the scale constantly must be
provided for in the projector.
16. It is advisable to provide a device for automatically indicating the total time
the equipment is in use.
17. The radio position finding instrument must} be equipped with special measuring
instruments for checking the performance and for tuning the equipment.
 Approved For Release 2007/09/04 : CIA-RDP80-0081OA005000820008-1
SDCRL`f/Q.S. OFFICIALS ONLY
-3-
18. The elimination of radio interference (Funkentstoerung) of the instruments must
be carried out in such a manner that the "norms for boundary values of operational
radio interference(s)" are adhered to. These are published by the Ministry for
Telecommunications of the USSR.
19. in the case of utilization of electromechanical relays, radio interference is to
be eliminated by filters. The use of electromagnetic relays is to be held to a
minimum.
II.Gonstructional requirements
1. The construction of the housings of the individual instrurents, which are to be
installed in closed rooms which can be heated, must be drip, splatter, and water-
proof, according to V1>F regulation no. 50. All instruments which are to be set
up on open decks must be of hermetically sealed construction.
2. All buttons, switches, etc., must be arranged on the frontrl nlatr of th- d^vices
and must be easily accessible anrr.have tuning-limiting devices (IIeberdrehungasichar) .
3. The radio position finding installation must be constructed in such a manner
that it can withstand rolling of the vessel up to plus or minus 500.
4. The structural parts must be vibration proof and arranged independently against
change of position.
5. The installation must meet the following tests:
a. Vibrate with a frequency of 10 cycles (600 per minute) at an amplitude of 1 mm
(oscillation..2 mm) for two hours.
b. Vibration through an impact of 7 g (g.9.81 m/sect) at a rate of 100 impacts
per minute for 10 minutes. The instrument must still work properly after
the conclusion of the vibration tests.
6. Utilization of easily inflammable insulation material is prohibited.
7. All parts must be moisture and heat resistant (teuchtigkeits- and waermebestrendig)
so that normal operation is guaranteed in the case of:
a. Change of temperature from $nus 3000 to plus 5000.
b. Relative humidity of 95 plus or minus 3% at an air temporature of 20?C plus
or minus 50.
c. The mechanically movable parts must remain in an operative condition within
the temperature range indicated in "a" above.
8. It is advisable that special ceramics, plastics of high quality, and similar
materials be used as irealating material in the manufacture of parts.
9. Copper, bronze, brass, silver, and similar alloys are recommended for use as
conductors.
10. Preferably, corrosion-proof metals (alloys) should be used in the housings. Other-
wise the housings of the radio position finding device must have corrosion-proof covers.
11.. The radio position-finding instrument must be equipped with a special device to protect
the operators from high voltage current when the housing is opened. After the housing
is open, no contact and no wire must have high voltage either between contacts, between
contacts and conductors, or from conductors to ground. When the housing is open, a
provision must be made so that the high voltage condensers automatically discharge
themselves.
 Approved For Release 2007/09/04 : CIA-RDP80-0081OA005000820008-1
12. With the ex3eption of the front panel (Frontweite), the housings of the
radio position finding instrument must be of punkas, cast, welded, or
riveted construction. Fastening of the panels with screws or bolts is
only permissible with special approval of the Soviet Sea Register.
13. The housings of the radio position finding instrument must be hinged
and so secure that it is impossible for the contents to fall out when
the ship rolls or lists.
14. All contact connections must withstand changes during operation.
15. All electrical connections in the instrument assembly must be screw
connections or hot-soldered without use of acid. Soldered spots are to
be marked in color.
16. Screw connections must be secured against loosening with check nuts or
spring plates. Safeguarding with a coat of paint is permissible up to
113 (sic).
17. Blank conductors must have a silver-coated surface or a similar corrosion-
proof covering.
18. All component parts, as well as contacts and terminals of the individual
parts (transformers, relays, springs) must be numbered according to the
specifications of the skeleton diagram and assembly plan. The numbering
must be legible and permanent. Utilization of paper and cardboard
stickers is not permitted.
19. Terminal clamps (Ausgangsklearen) and conte.cts must be marked to show
their purpose (what they are connected to);on supply circuits, voltage
and polarity must be indicated.
20. All handler, knobs, and measuring instruments must be labeled.
21. The positions of all switches must be clearly indicated on all identification
plates.
22. The required time for gaining free access to the internal parts and tubes
of the instruments must not exceed 30 seconds.
23. The individual instruments of the radio position-finding instrument must
be arranged in such a manner that they do not influence magnetic compasses.
24. It is advisable that the antenna of the radio position-finding instrument
be erected on a special metal pole or on a special lattice-type mast. A
platform must be erected on the upper part of the pole. It must be surrounded
by a protective screen, and provided with'.d laddet?.
The antenna should be mounted near the bridge if possible. Mounting' the
antenna installation on the ship's mast is only permitted when the mast is
located in the immediate vicinity of the bridge.
25. The antenna must be set up as high as possible and in such a manner that the
field of vision of the horizon is not obstructed by superstructures, smoke-
stacks, ventilators , etc. It is recommended that the antenna be erected
slightly off the vessel's center, in case the field of vision in the direction
of movement is obstructed by masts.
26. Tackle insulators (Takel-Isolatoren) must be inserted in all traction ropes
which serve to hold the mast of the antenna installation. If this is not
possible, the traction ropes must be grounded.
 Approved For Release 2007/09/04 : CIA-RDP80-0081OA005000820008-1
27. If possible, the antenna should be erected above the transmitter, to
prevent bending of the feed line. In case this is not possible, the
feed line must be installed with as few bends as possible.
The radio position finding station must be equipped with three copies of each
of the following docunentes
a. Pass (Typenfreigabe)
b. Description and instruction book
c. Skeleton diagram
d. Assembly plan
e. Photographs
f. List of spare parts
g. Transfer certificate of the manufacturer (probably a shipping list)
h. Two test reports
IV. Replacement parts
The minimum number of replacement parts which belong to the radio position-
finding installation must be coordinated with the Main Administration of the
Sea Register of the USSR.
V. General constructional guide lines
Data for the construction of 50 to 100 transmitters per year in mass
production are to be furnished.
VI. Tooting
For the factory test (Werkpruefung) of each instrument, Speoifio regulatibne must be
complied with. The final test meet last two full hours.
This may be similar to the U.S. video mapping devices.
SEORET/b.S. OFFICIALS ONLY
Approved For Release 2007/09/04 : CIA-RDP80-0081OA005000820008-1