ANALYTICAL STUDY OF THE KOMAR- AND OSA-CLASS GUIDED MISSILE BOATS

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP80T00246A063500280001-6
• Release Decision: RIPPUB
• Original Classification: C
• Document Page Count: 19
• Document Creation Date: December 27, 2016
• Document Release Date: March 26, 2013
• Sequence Number: 1
• Publication Date: February 20, 1963
• Content Type: REPORT

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CENTRAL INTELLIGENCE AGENCY
This material contains information affecting the National Defense of the United States within the meaning of the Espionage Laws. Title
18, U.S.C. Seca. 793 and 794, the transmission or revelation of which in any manner to an unauthorized person is prohibited by law.
SUBJECT
Analytical .Study of the KOMAR- and OSA-
DATE DISTR.
July 1962
Class Guided Missile Boats
NO. PAGES
1
DATE OF
INFO.
PLACE &
DATE ACQ
A 16-pag~
study
Distribution of Attachment:
OSZ : Ro en7,o/)
15
4
=3
2
STATE X ARMY X NAVY AIR LX I NSA I X I OCR
I (Note: Washington distribution indicated by "X" s Field distribution by "#".)
c ter' f
at- ! _ 50X1-HU
NIC -I X IDIA X
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The hull is the same as is found in the P-6 class speedboats,
withouteiiLrTichanges.
According to recent information newly mass-produced hulls are
being used in the construction of this class. Therefore, this is not
only a rearmament of old boats. The series production of the P-6
class is continuing. The measurements are as the P-6 Class A 25.5
meters w4
! h 6.1 meters.
Bridge
The form and measurements of the bridge are for the most part
the same as in the case of the P-6 Class. However, the steering
stand is enclosed on all sides and has one window on the starboard
side and one on the port side, as well as 3 bullseyes in the fore
end which are to be equipped with rotating clear view iftmisigft. The
bridge house which is directly under this has one square window on
the starboard and port sides as well as in the fore end.
The mast which is approximately 6.5 meters above the upper deck
is a four-legged trellis# mast of conspicuously stable construction.
It is located directly behind the bridge. Its ig forward supporting
legs, which run upward in a slant, stand in the rear part of the
bridge house which is open. Half-way up the mast, a platform has
EzcPuc:, ,::~ w4~~~^t6c{ 50X1-HUM
sir ~ ;lu I?
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been built into it which serves as an observation stand. During voy- 50X1-HUM
ages at least a men can be posted here as look-outs, similar to the
stand on U-boats. The stand is directly acceble from the bridge.
ELECTRONICS
The new square-tie radar is mounted on the upper mast platform.
The height of the screen which is easily lifted upwards is approx-
imately 0.65 meters and the width is approximately 1.6 meters. Its
form is unusual and consists of 2 squares of different sizes which
are made out of wire screening and laid over one another. Heavy bands
bind. the screen to the relatively large motor housing on the back
side of which there is a stabilization plate. The Horn ANSUNNOW e sits
above the upper screen edge and its leading wire is attached to the
motor housing. The installation height of the instrument above the
water line is approximately 9 meters.
On ? side outriggers of the radar platform there are the fol-
lowing:
1 VHF antenna (starboard) and 1 High Pole -IFF answering in-
strumentj (port) and an IFF-Dead Duck ,oper&t rstol phone.se'tis
located on an outrigger which lies somewhat lower and forward.
Insofar as it has been ascertainable thus far, there is only
one antenna which is located on the deck of the steering house.
Its length is approximately 7 meters.
WEAPONS
a) Missile-launcher
The KOMAR boats are being outfitted with two different missile-
50X1-HUM
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launcher models which indicates the use of two types of missiles. They
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differ from one another externally only in the profile of the launcher
housing and hereafter will be designated as Model I and Model II. The
other characteristics of the models are the same.
The missile-launcher is mounted on the after third of the boats
hull on each side of the upper deck. It consists of the following
parts:
1. A launching track with an almost U-shaped cross-section of
approximately 0.2 meters in height and 0.7 meters in width. The
length is 7.4 meters. The track is mounted firmly in"an angle of 130
on 2 multiply - based double poles on the upper deck in a longitudin-
al direction in such a way that the after-end is approximately 1 meter i7
from the upper deck.
2. A "loading tray" which consists of a -metal "tube", opened
at the top and at the end, with a U-shaped cross-section. It is also
mounted on the upper deck by means of 5 double poles in a 13? eleva-
tion so that it forms the continuation (extention) of the launching
track to the rear, whereby the after-end lies on the upper deck. Its
04 -
length is approximately 2.7 meters, the width approximately $0 meters.
The "loading tray" presumably serves to dissipate the blast dur-
ing the launching of ~a missile.
3. The launcher' cover, a bow shaped, lightweight metal
construction, is attached over the launching track in such a way that
the entire length of the track is covered by it.
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The track lies inside on the under side of the covering. Its 50X1 -HU M
cross-section in the upper part of Model I is semi-oval and has a
semi-rhomboid form in its under part. The profile of Model II is
different in that it has a small square elevation in the cross-sec-
tion. The after-termination of the covering runs vertically while
the forward termination slants to the longitudinal axis . There is
a symmetrical opening in the shape of a rhombus in the forward termi-
nation plate. Insofar as it has been ascertainable so far, there are
lids
no permanent . (During the short observations) the containers
were covered fore and aft with coverings). On the under outer side,
F (d5
there are two small xv@MB which probably open downward and which
are used as service U. Access to them is made possible by an
extention of the upper deck (gangway) which is supported in 10 places
to the ship's side. The containers presumably serve to protect the
missiles cleared for launching against sea water and the influence of
weather. Measurements and characteristics can be seen from the dia-
b) 2.5 cm gun
The gun is located on the forecastle. The model and installa-
tion are the same as on the P-6 class speed boats. Other weapons
cannot be seen.
Missiles
Concerning the missiles to be used, at the present time there
are only conjectures which Dint to rockets used against ship and
shore targets. The maximum range is estimated at 30 sea miles
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In the final phase of the trajectory, target aquisition is accom- 50X1-HUM
plished by means of a homing device which works either on a passive
infra-red or an active radar basis.
The different information which is given under paragraph 3
gives some basic values which can contribute to an explanation of the
,question:
1. The maximum length of-the covering and the launching track
amounts to 7.4 meters. Therefore, the same length can be used for
the missile.
2. The--,cross-section of the covering and shape of the forward
rhombus-shaped opening make the use of missiles equipped with lifting
surfaces and tail assemblies (cruise-type missiles) very probable.
Radio control is probably used as a guidance system. It can be as-
sumed that in the final phase of the trajectory, a homing device is
used.
The thought that the missiles to'be used by the Navy could be
those already tested by the Army or Air Force cannot be proven by the
facts available.
3. The effective range of the missiles is commensurate with
the radar range of the boat. At an installation height of 8.6 meters
above the water line, the theoretical range of the radar instrument
under normal conditions and thus also that of the missilelis approx-
imately 14 sea miles. This distance is valid for the case when the
KOMAR boats are used singly or in their own groups. An expansion
of the missile range by means of data transfer from units of greater
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radar horizons (destroyers or airplanes - helicopters) is consid- 50X1-HUM
ered possible.
1+. The form and cross-section of a launching track make it
seem possible that a catapult launch is used to attain the rather
high ?o (initial velocity) necessary for an aerodynamic missile.
OSA- Class (Diagram Attachment 2)
The missile speed boats of the OSA class are of new construe-
tion and from the very beginning were planned as missile carriers.
The relatively low sea endurance and possibility for use of the
certainly
KOMAR class, caused by the type of construction and the size, can/be
viewed as the major reasons for the construction of larger boats.
In this way, an improvement of the sea characteristics, an expan-
sion of the action radius, and the doubling of the missile armament
have been attained and the serviceability and ' effectiveness
have been considerably raised.
Preliminary Remarks
Thus far, two types of the OSA Class are known which differ
from one another due to the different length and design of the launch-
er as well as the even smaller deviations caused by this. The other
characteristics of both types, such as the length of the hELL, con-
struction, etc., are the same. Hereafter the two designs will be
designated as Type I and II. The deviations will be pointed out in
the appropriate places.
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Hull 50X1-HUM
As far as can be seen,-the hull is made of metal.' Its appear-
ance indicates its origin; - the4 typical form of the Anglo-Amer-
ican speed boat of the last World War. However, the differences
from these as from all "normal" speed boats, can be seen in the form
of the boat viewed from above. Caused by the need of space for the
installation of the missile launchers, the boat's hull does not taper
as usual towards the afi but rather keeps the greatest width which
is at the bridge7all the way to the stern so that a "flat-iron shape"
is created. The over-all length is approximately 39.6 meters, the
width 8.6 meters.
Deck Construction
a) Bridge
The bridge consists of a steering house closed on all sides
which has two square windows on each side and 3 in the front. Rotat-
ing clear view screens cannot be seen. Particularly noticeable is
the bridge top-side which drops off rapidly towards the stern and
whose angle of inclination is exactly equal to that. of the forward
missile-launcher pairs. The unusual form is necessary because a hor-
izontally running deck would make the launching of the forward missiles
impossible due to lack of space. On the steering house, there is a
stand which is open in the rear and which has an air nozzle and a
glass covering for the bridge personnel.
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b) Deckhouse)
Directly by the bridge there is a long deckhouse which can be 50X1-HUM
used as a type of protection room for the upper deck and service
personnel. There are no bulls eyes. Access into it is accomplished
through an after and two side doors. Direct connection (internal)
to the bridge house can be assumed. On the deckhouse there are two
air shafts which are open to the rear, for the motors and different
ventilators.
C) Mast
The mast is formed as a tubular mast. It tapers slightly
upwards and its cross section is long and oval. The height is 5.8
meters measured from the deckhouse and 10.8 meters above the water
line. The greatest width (measured on the latitudinal axis of, o
IS
the ship)A 0.4 meters and measured on the longitudinal axis of the.
ship it is 0.9 meters (type I) and 0:8 meters (type II).
Electronics
The electronic equipment is basically the same for both types.
It consists of the following:
a) One square tie radar instrument on the mast head
b) One high pole IFF answering instrument with VHF antenna on
the port yardarm of the mast
c) One VHF antenna on the starboard yardarm of the mast
d) One square head IFF operators telephone set on the
yardarm under the two instruments mentioned under c). On type I
this is located on the port side forward and to the side, on type II
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in a right forward position. On both types there is another 50X1-HUM
yardarm which can be moved 180?, however,,tb i~ far a type of
socket can be recognized on it only on type I.
e) One VHFantenna, only on type Is on a yardarm in a forward
direction below d). An unknown instrument is mounted under the
antenna which is held by an additional support. It has the shape
5e&-R0,/4J-IG 1
of a large 41W the corresponding yardarm on type II thus far
only has a type of socket without the instrument.).
f) One whip antenna on the starboard side of the bridge house
overhead.
g) One whip antenna on the deckhouse, approximately in the
middle of the port forward missile launcher.
h) Two unidentified instruments on supports of different
heights on the forward motor ventilator shaft.
Missile Guiding Instrument'
Thus far, only on one boat of the type I has an instrument been
seen which is similar to a spotlight and which due to its shape,;. and installation is being used as a radar guiding instrument for
missile control. The instrument stands in a socket attached in a
platform which is two meters in height on the after?end of the
deckhouse between the two after missile launchers. The diameter
of the spot light type mirror, whose forward and rear sides appear
to be clouded, is 1.1.meters. The side' , covering.. is 0.9 meters wide.
The mirror is apparently rigidly mounted to the motor housing at
an angle of approximately 20? and is adjustable only from the side.
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DzLS Tr (r 1
A Cardanic suspension as a prerequisite for the height-adjustabilito
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cannot be determined. (The instrument is sketched in on the diagram
of type I.)
Weapons
a) Missile launcher
Both types of the OSA class are equipped with four missile
launchers which are installed in pairs one behind the other on
either side of the deckhouse. They consist of a launching track
mounted rigidly in a -specific angle of elevation and are of the
same type as those on the Komar class. However, they differ from
these in that the tracks are protected on all side-j,-,,by a metal
covering up to the upper deck. The metal covering is closed in
the rear and is equipped with movable opening lids in the front.
On each of the after terminating walls there is a door which
opens outward.
Type I
1) Forward launching.-pair (height figures refer to height above
the upper deck)
Length between the perpendiculars: 9.4 meters
Length, longest: meters
Height, forward: 3.2 meters
Height, after: 2.0 meters
Angle of elevation: 120
Width (covering): 2.8 meters
Width of the opening: 2.6 meters
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DLyl 1/ G
The opening lids are opened downward so far until they lie in an
approximately horizontal position on ahe!sup'ports which.are.;put 50X1-HUM
there for this purpose on either side of the bridge. The form of
the lids is completely different from that of the other launchers.
They consist of two parts which lie over one another, a long
upper part which almost runs to a point at the top, and one or
two wing type diagonal parts which are installed under it (see
partial sketch type I. front view). The opening which is
visible when the lids are open shows the profile of an aero-dynamic
missile.
The cross section of the launching cover, which also runs upward
into a point like the lid, indicates a missile with rather high
lifting surfaces.
The opening of the terminal lid downward is hindered, as can be
seen in the side and front view diagrams of type I, by the
bridgehouse which is partially built in to the forward launcher
covering. Although the actual mechanical procedure has not yet
been observed, it appears that a complete opening would only be
possible when the "wing" part of the lid lying next to the
bridgehouse is either pushed outward or is moved upward.
In the middle of the lid (as is the case on all of the other
launchers) there is a vertical,fiulge which runs from the top to
the bottom,.,:.the cross section of:' w'n eh'=is `almost triangular in shape.
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? BELT # 2
The purpose of this has not yet been determined. It is possible 50X1-HUM
that the missiles Gdear ej for launching protrude somewhat
without this, bulge.
from the plate covering so that the lid could not be closed
Another narrow bulge?'which has the form of a groove, runs
perpendicular to the longitudinal axis in the first third and
completely around the entire covering. It can only be seen on
this launcher model and has not yet been explained.
An approximately 60 centimeter high and 1.6 meter long bent:.,.:
dissipation plate is rigidly mounted to the after end of the
covering for the purpose of dissipating the missile blast. The
plate is installed in such a way that when the door is open (see
above) it takes the blast and directs it outward.
2) After launching pair
Length between the perpendiculars: 9.6 meters
Length, longest: 9.8 meters
Height, forward: 3.6 meters
Height, after: 1.9 meters
Angle of elevation: 130
Width: ,(covering): 2.8 meters
Width of the opening: 2.6 meters
The cross section of; the launcher covering is rounded off at
top. The opening lid is moved upwards. Just as is the case
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with the opening which it closes, the lid has the shape of a
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rhombus.
The under part of the launcher covering is supported by the
side walls of the deckhouse while its protruding part
stands free. In order to prevent vibrations and distortions
caused by the influence of weather and the launching of the
missiles, this part of the covering is secured by six short
supports which are attached to the deckhouse.
In order to dissipate the blast during launching, (a
particular characteristic of type I) instead of a dissipation
plate there is a "gutter" in the hull of the boat behind each
launcher which forms an elongation of the starting track
towards the stern. It is covered when. not in use. The
constructioinis very much like the "loading:.tray" of the
Type II
Forward and after launching pairs.
The four launcher coverings of this type have the same dimensions
with the exception of the cross section of the forward pair. The
angle of elevation differs in the two pairs and thus the altitude
values also differ.
Length between the perpendiculars: 7.8 meters
Length, longest: 8.0 meters
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BELT # 2
Height, forward, forward pair: 3.0 meters, after pair: 3.6 meters
Height, rear, forward pair: 2.0 meters, after:pair: 2.4 meters 50X1-HUM
Angle of elevation$ forward pair:?,12?, after pair: 13?
Width (covering): 2.8 meters
Width of the opening: 2.6 meters
The lidsbof all the launchers are opened upwards. On the rear
wall of each covering a dissipation plate is mounted on the upper
deck for the dissipation of the blast as with the case with type
I, however, here they are approximately one meter high and
approximately two meters long.
The covering of the forward launcher pairs has a cross section
which runs upward into a point similar to type I which leads to
the same conclusions with respect to the missile form.
b) Conventional Armament.,;
Two double gun mounts of the new type are located on both types
on the forecastle and on the quarter deck. The caliber of the
twin barrels is estimated to be 2.5 centimeters. A special
characteristic is the probably armored cap (hemispherical turret)
which covers the entire position and, compared to the old model,
guarantees better protection for those servicing it.
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The field of fire, which in the case of type I: was almost 360 degrees, 50X1 -HU M
is considerably limited in the case of type II due to the low heighth
of the muzzle and because of the launcher coverings.
Other weapons were not ascertainable.
Missiles
Generally speaking, what was said in-the comparable paragraph
concerning the Komar class is also true of the OSA class.
It can be assumed with a certain degree of assurity that the
length of the launching.,track on the Komar and OSA classes, ~M II,
are the same. (The somewhat greater length of the launcher covering
on the OSA type II, is due to the vertically constructed rear terminal
wall!). The use of the same type of missile on both units is therefore
very probable.
The greater length of the coverings on the type I, however,
indicates a longer launching track and thus the possible-' use of a
longer missile.
The radar range on the OSA class is approximately 16 / miles when
the instrument is mounted approximately 11.5 meters above the designed
water line, whereby the range of the missile is correspondingly
increased as compared to the Komar class.
Technical characteristics
Komar class
There are no indications that changes have been made in the htall
of the boat and in the machine installations as compared to the P 6`,
boats and thus the technical characteristics have probably remained
50X1-HUM
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the same.
OSA class
According to the information learned concerning length and
width, it can be estimated that the greatest draft is 2.2-2.5 meters
and the greatest displacement is 200-240 tons.
Assuming a speed of 1+0 knots, there must be a power capacity of
from 9 to 12,000 horse power which is probably produced by diesel
motors. In any case, definite signs of gas turbine power units were
not ascertained. The motor exhaust could possibly be under the water
line. The visible outboard openings could also serve other purposes.
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