The second life of "Shilka". New modification: "Shilka-M4"

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ZSU-23-4 "Shilka" is a real legend among self-propelled anti-aircraft installations (ZSU), and its long military life deserves only respect. This ZSU is an example of a rational attitude to military equipment, which has already been discontinued, but still able to perform the tasks assigned to it.

Despite the fact that the Shilka serial production of the ZSU-23-4, named after the river, the left tributary of the Amur, was discontinued in 1982, modernizations of this installation continue to appear today not only in Russia, but also in other countries Poland, Ukraine, and the ZSU itself is still in service with the ground forces of the Russian Federation.



ZSU-23-4 "Shilka" (GRAU index 2А6) is a Soviet self-propelled anti-aircraft gun designed to directly cover ground forces, defeat various low-flying air targets (helicopters, airplanes, UAVs, cruise missiles), as well as ground (surface) targets as fire from the spot, and when shooting from short stops or in motion. The complex was developed by the famous Pribobystroy Design Bureau from the city of Tula, and by the production of the UMP, the Ulyanovsk Mechanical Plant, which today is part of the Concern VKO Almaz-Antey. The company is engaged in the modernization of the ZSU-23-4 Shilka at the present time. In the Soviet Union, this ZSU was part of the air defense units of the ground forces of the regimental level. Serial production of the installation, which was armed with a quad automatic 23-mm cannon with a rate of fire of 3400 rounds per minute, began in the 1964 year and lasted until the 1982 year. In total, about 6,5 thousands of ZSUs of this type were collected during this time.

Virtually none of the military conflicts of the second half of the 20th century did not go without the use of this combat vehicle. "Shilka" participated in the battles on the territory of Vietnam, where it was quite a serious threat to American pilots. It was actively used in the Arab-Israeli wars, the civil war in Angola, in the Libyan-Egyptian conflict, the Iran-Iraq and Ethiopian-Somali wars, in the fighting in the Balkans and in the Persian Gulf. The USSR widely used ZSU data during the war in Afghanistan. In Afghanistan, "Shilka" was used not as an air defense system, but as an infantry support fighting vehicle, inducing real horror to the souls. For the colossal combat power of four twin automatic guns, which have a huge rate of fire, the Afghan Mujahideen have nicknamed “Shilka” - “Shaitan-Arba” - devil's cart. In the absence of a real threat from the air, the installation was used to fire at various ground targets, including lightly armored ones, at a distance of 2-2,5 km it could easily suppress any enemy fortifications with fire.

The second life of "Shilka". New modification: "Shilka-M4"
ZSU-23-4 «Shilka»

At the same time, "Shilka" remains in demand in the XNUMXst century. This ZSU is actively used in a military conflict in Syria. Here it is also used as a fire support vehicle, which covers the action of attacking infantry units and tanks. With dense fire of quick-firing guns, the installation destroys machine gunners, snipers and grenade throwers of the enemy. This installation is especially effective in the conduct of hostilities in a dense urban area. The lifting angle of the automatic 23 mm guns is 85 degrees, which makes it easy to suppress the positions of militants located even on the upper floors of buildings. According to military experts, no large-scale army operation has been carried out recently in Syria without the participation of ZSU-23-4.

The quad automatic 23-mm gun, possessing high rate of fire and high initial velocity of the projectiles, is able to create a real "sea" of fire. Therefore, even a tank that falls under its fire can be taken out of combat, having lost almost all attached equipment and observation devices. Although modern anti-aircraft missile and air defense missile systems, which are available to the Russian Ground Forces, are superior to the Shilka in their parameters and characteristics, the main advantage of the ZSU is its ability to use it at the front line with direct contact with the enemy forces. Saves the presence of splinter and anti-bullet armor.

Until now, the installation ZSU-23-4 is in service with dozens of countries around the world, being an inexpensive, but at the same time universal means for solving various combat missions. At the same time, the appearance on the scene of new means of air attack and an increase in the pace of modern combat made it necessary to modernize the installation. Shilok is still used by hundreds in various armies of the world. At the same time, despite its already quite honorable age, there is often no alternative to them. Especially, taking into account the fact that not every state can afford to purchase new ZSU. Under these conditions, the task of modernizing a veteran machine only becomes more urgent.

ZSU-23-4М4 Shilka-М4

Experts and military experts believe that one of the best options for upgrading and “modernizing” this combat vehicle is the Russian version of the Shilka-M23 ZSU-4-4М4. This version of the installation upgrade has been repeatedly demonstrated at exhibitions both in Nizhny Tagil and in the Patriot park near Moscow. The fire and running capabilities of the Shilka-M4 ZSU were also demonstrated in the framework of the Army-2018 International Military-Technical Forum at the Alabino training ground. According to the developers, the capabilities of the upgraded Shilka for air defense of ground forces units in all types of military operations and air defense of stationary objects have increased significantly.

ZSU-23-4М4 is an upgraded version of the installation with a new radar OMS (fire control system) and the possibility of installing the Sagittarius air defense missile system. The updating of the MSA is accompanied by the replacement of the existing radar with a newly created station of the same frequency range on a solid-state element base with an improved set of characteristics. The Sagittarius air defense missile system is designed to provide automated remote single, sequential launching of an Igla-type anti-aircraft system from a variety of land, sea or airborne carriers. When two or more Sagittarius combat modules are installed on the carrier, it becomes possible to launch salvo launches of two missiles at the same target, which significantly increases the chances of its being defeated. The placement of this complex actually turns the Shilka into a real anti-aircraft missile gun.

Also included in the battery of the complex was a PRNU, a mobile reconnaissance and control center “Assembly of M1” as a command post (CP) and a telecode communication channel for information exchange between the CP and ZSU. On board the upgraded machine, the analog calculating device was replaced with a modern digital computing system (DDS), and a digital tracking system is mounted. Has affected modernization and tracked chassis. Modernization of the chassis is aimed at improving the maneuverability and controllability of the self-propelled unit, as well as reducing the complexity of its operation and maintenance. The radio station and the active night vision device are also changing, replaced by a passive one. The upgraded version also installs an automated monitoring system for electronic equipment and air conditioning, which improves the working conditions of the crew, which is especially necessary in conditions of operation in a hot climate. The number of crews self-propelled remained unchanged - 4 person.


ZSU-23-4М4 Shilka-М4


Having received as a part of the modernization, new equipment and equipment, Shilka-M4 retained its most important and proven over the years weapons - the quadruple 23-mm automatic gun 2А7М, which is easily guided in any direction along the azimuth with inclination / elevation angles from -4 to + 85 degrees. Effective shooting from this artillery mount is possible at a distance of 2-2,5 kilometers with an initial velocity of the 950-970 projectiles, m / s. The installation reach for height is 1,5 kilometers. This artillery installation can be effectively used to fire at flying targets moving at speeds up to 500 m / s. At the same time, with the use of Igla anti-aircraft missiles of the Strelets air defense missile (4 has such missiles on a combat vehicle), the target destruction range increases to 5 kilometers, and the height to 3,5 kilometers.

The standard Shkilka-M4 ZSU ammunition consists of 2000 23-mm shots and 4 Rocket Eagle. When operating in a single air defense system, the maximum detection range of air targets can reach 34 kilometers. The maximum range of tracking a radio channel is 10 kilometers, the minimum is 200 meters. The minimum height of tracking air targets radio channel is 20 meters. The consumption of shells per downed air target is estimated at 300-600 shots. The probability of hitting an air target in one span at an 300 shot rate is estimated at 0,5.

Unlike its predecessors, the Shilka-М4 modification is able to work in the conditions of difficult jamming conditions, and also to effectively detect air targets flying at low altitudes. Automation of the updated anti-aircraft complex independently adjusts for the wear of gun barrels and meteorological conditions, and also takes into account other factors affecting the trajectory of the projectiles and, as a consequence, the accuracy of fire. Simultaneously with the Shilka-M4 retrofit option, there is also an upgrade option for the ZSU-23-4М5, which is characterized by the presence of an optical-location channel in the control system that can guarantee the combat operation of the ZSU under conditions of strong interference with its radar. In the modernization project "Shilka-M5" it was also proposed to equip the combat vehicle with a laser rangefinder and an additional television viewfinder. The upgrades of the legendary Shilka ZSU currently being carried out provide the complex with a second life and the ability to remain in service with the Russian army and the armies of other countries for a long time.


ZSU-23-4М4 Shilka-М4


Information sources:
http://nvo.ng.ru/armament/2018-09-13/2_1013_fire.html
https://tvzvezda.ru/news/forces/content/201708080821-ynjz.htm
http://www.vestnik-rm.ru/news-4-13544.htm
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46 comments
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  1. +13
    27 September 2018 06: 18
    Once I saw how she shoots, and even at night with tracers. The sight is creepy and beautiful. On the final trajectory, the shells fan out.
  2. +21
    27 September 2018 07: 18
    Radar "solid fuel element base"... does it work on coal? Probably all the same" solid state ".
    (I have never seen on Ctrl-Enter that errors in the article were corrected, so the question is for the author here)
    1. +4
      27 September 2018 13: 56
      Fixed.
    2. 0
      17 March 2023 01: 00
      So after all, solid fuel firewood. , That's just, and with the "solid-state" element base is also a misunderstanding. If we are talking about electronic components, then they are divided into passive (linear) and active (non-linear). But the "liquid-body" elemental base is, rather, the area of ​​the future, but science fiction.
  3. +6
    27 September 2018 07: 36
    The strange fate of this device was made to combat air targets and is used mainly against targets on earth.
    1. +11
      27 September 2018 08: 12
      This is obvious, a quick reaction, a flurry of fire, a high cross-section of ZSU, as God himself said, by the way. This is a common practice in the world, the USA in Korea and Vietnam, the USSR in Afghanistan and Chechnya, Israel in Lebanon, and so on.
    2. +13
      27 September 2018 13: 02
      Quote: Semurg
      The strange fate of this device was made to combat air targets and is used mainly against targets on earth.

      Nothing strange - just the enemy quickly reacted to the appearance of "Shilok" and increased the range of the ATGM. As a result, "Shilki" became obsolete in the early 80s as an air defense weapon of the "big war", which was recognized even by domestic experts. The ZSU was left without air targets - the enemy could launch an ATGM without entering the effective fire zone of 23-mm guns.
      Fortunately, the tendency to increase the ATGM operating range was taken into account in the USSR back in the early 70s (almost immediately after the completion of the development of Shilka), and the development of a new ZSU was started to replace the ZSU-23-4. The solution was found in increasing the firing range by introducing missiles and increasing the caliber of guns. The output is "Tunguska". smile
    3. +8
      27 September 2018 15: 04
      Of course, no one expected that it would be possible to use an air defense system on the ground with such efficiency, but this has already happened in history: the Germans put an 88 mm anti-aircraft gun on Tigers, and we also used anti-aircraft guns to fight tanks.
      1. +3
        27 September 2018 16: 23
        S-53 on T-34-85, "daughter" of anti-aircraft guns 52K
        1. 0
          27 September 2018 19: 08
          IL-18, Germans on T-6 (Tiger) set their anti-aircraft gun 88, ours repeated on T-34 with their anti-aircraft gun 85. I recall M. Tukhachkvsky, because here his versatility of the gun is applied, it is a pity without it and in a truncated form. According to Shilka, for tasks and weapons, for low-flying UAVs and KRs, they raised it from storage depots and screwed MANPADS and corrected the guidance ...
    4. -1
      29 September 2018 11: 43
      It is appropriate to recall the famous aht-aht.
  4. 0
    27 September 2018 07: 53
    Good morning, Sergey, thank you for the article. I have a question for you, I read, I’ll already remind you where, based on combat experience during the Yom Kippur War of 1973, ZSU-23-4 they wanted to upgrade Shilka, replace 2A7 submachine guns with GSh-6 -23 or two GSh-2-30 double-barreled submachine guns, and also add Strela-2 / 2M or Strela-3 / 3M MANPAD missiles, with placement on the sides of the tower. What is most interesting, we are talking about the middle of 1974 and until the end of 1985 , that is, not after the Perestroika of 1991. If you have data on this project, I will be very glad. Thanks again.
  5. +17
    27 September 2018 08: 22
    Hell guidance system there. But virtuosos even successfully worked on surface targets. Back to the hill - and hello katerok. True, following the Israeli, the Egyptian flew into the water area. Ours did not understand. The commander received the Red Star.
    1. +12
      27 September 2018 12: 56
      sergo1914-so one of the modes of this machine is called-work on surface targets hi in the exercises in the Baltic Sea in 1988, one operator was a little mistaken, gave the sighting line not over the shield that the tug pulled, but over the tug, the track did a little higher than the mast, and the tug crew, in order not to tempt fate, immediately threw the towed shield, and gave the fullest progress from sin away, everything happened ... hi
  6. 0
    27 September 2018 08: 35
    As far as I know, Shilka arrived in Vietnam too late to take part in the database.
    1. +3
      27 September 2018 11: 36
      here I have an encyclopedia of tanks and sau translated from English by Philip Truitt
      and here’s what is written under the shilka
      This machine was widely sold to other countries and as part of the Egyptian army took part in the 1973 war,
      having shown high efficiency in the fight against Israeli aircraft, preferring flights at low altitudes due to the threat of Egyptian anti-aircraft missiles. In addition, these anti-aircraft installations were used in Vietnam and shot down many American aircraft.
      1. -1
        27 September 2018 12: 12
        Yeah, and Martian too. Until the Vietas decided which of the older brothers was closer to them - the USSR or China, nobody supplied them modern equipment. So that the Chinese immediately grabbed it and disassembled it into components? There were no such fools. And anyone could write anything.
        1. 0
          27 September 2018 12: 59
          perhaps the author confused the mass use of DShK machine guns and towed anti-aircraft guns, including on vehicles, with the advent of Shilka. For example, the Ural + 23x2 is very popular
    2. +10
      27 September 2018 13: 01
      Igor Kopeyetskiy — I don’t remember the training center now, but there was a silk painted with gold paint with the number 4 on the tower on a pedestal — so many she destroyed in the Vietnam aircraft, the USA saw the photo in 1987. and the maximum number of air targets in Vietnam shot down by one silk for all the time this part was there, it seems like it exceeded 15 hi
  7. +2
    27 September 2018 10: 03
    As far as I know in terms of reliability, the Shilka with its 4 separate barrels prowls the famous US 6-barrel Vulcan, slightly inferior to him in rate of fire. Of course, it would be nice to add a surveillance radar to the Shilka guidance radar, at least the same one used in the TOP, which would significantly increase its combat effectiveness and reduce Shilka's dependence on "otherworldly" radar images. Moreover, they are not always nearby.
    1. +1
      27 September 2018 15: 43
      23mm cartridge is more powerful than 20mm times 1,5. But aviation switched to 30mm and became better to armor. And 23mm is not enough now.
    2. +3
      29 September 2018 02: 00
      Quote: gregor6549
      As far as I know in terms of reliability, the Shilka with its 4 separate barrels prowls the famous US 6-barrel Vulcan, slightly inferior to him in rate of fire. Of course, it would be nice to add a surveillance radar to the Shilka guidance radar, at least the same one used in the TOP, which would significantly increase its combat effectiveness and reduce Shilka's dependence on "otherworldly" radar images. Moreover, they are not always nearby.

      - why is "superior in reliability"? There is nothing to break in Vulcan, it has an electric drive, it is simple as a pencil!
      There are 4 gas outlets, four tape feed paths. Not to mention the fact that the trunks are spatially spaced and require shooting, after replacing the barrel. The USSR could not put an analogue of Vulcan with a caliber of 23 mm - the machine itself was not there. And when it appeared - it is impossible. :))) A gas vent drive is hell, only on ships, so that sailors clean it all the time.))) It’s possible on a plane, but there’s enough to shoot once.
      In terms of rate of fire, the ground volcano is inferior to 3000 rounds, against 3700 for Shilka.
      The volcano is inferior in power to the projectile, significantly.
      But the M163 was removed from service in the 80s.
      1. 0
        18 October 2018 15: 02
        Yes, gas outlets are not the best thing for "exploiters". But the electric drive and power supplies to it are also not the most reliable thing in the field. At the same time, if one of the barrels or one of the ammunition supply mechanisms fails, Shilka has three more INDEPENDENT sets in stock. And Vulcan has everything in one bottle i.e. if the barrel pack is overheated or the ammunition feed mechanism is jammed, that's it, oil painting.
  8. +11
    27 September 2018 11: 32
    tremendous combat power of four twin automatic guns


    Error - four paired - this is 8 trunks.
    All the same "quadruple installation" would be the correct term - sorry for the verbosity.
    But as they said at our secret department: - "An error in the fourth decimal place and the warhead falls 10 km away from the target ..."
    Let's stick to accepted terms in the professional engineering community.
  9. +1
    27 September 2018 12: 23
    I actually saw the work of this wonderful ZSU-23-4 machine on ground targets ... then I saw what was there, or rather left from human bodies .. the sight is not for the faint of heart, well, it’s clear from hell that you know what’s left
  10. -1
    27 September 2018 12: 40
    The unit’s reach in height is 1,5 kilometers. This artillery installation can be effectively used to shell flying targets moving at speeds up to 500 m / s. At the same time, when using Igla anti-aircraft guided missiles, the Sagittarius air defense system (there are 4 of these missiles in the combat vehicle), the range of targets is increased to 5 kilometers, and their height to 3,5 kilometers.

    Hmmm ... that is, it turned out to be a ZSU for a third world camp, whose opponents have the same rogue without modern weapons.
    Because even in the modernized version, the range of fire of all Shilka fire weapons is less than the launch range of modern helicopter ATGMs.
    1. +6
      27 September 2018 13: 04
      when it was created, it was the best in the world, and now it is capable of a lot in experienced hands, and protection was created from helicopter missiles that did not go into the series — painfully expensive.
      1. +4
        27 September 2018 13: 27
        Quote: ANCIENT
        when it was created, it was the best in the world

        Until the early 80s. Moreover, the rapid obsolescence of the "shilka" was predicted immediately - it was not for nothing that after the completion of the development of "Shilka" work began on the ZSU to replace it.
        In current conditions, "shilka", even with missiles from MANPADS, is ZSU for the poor. Or a means of fire support for tanks and infantry during battles in urban conditions. smile
        Quote: ANCIENT
        and protection was created against helicopter missiles, which did not go into the series; it came out painfully expensive.

        The problem is not to protect the installation itself from ATGM. The problem is to cover protected targets from ATGMs. And for this ZSU need to hit the carrier before it reaches the launch range of ATGMs.
        So, already in the 80s, the effective firing range of the "shilka" was less than the effective firing range of enemy helicopter ATGMs. That is, the enemy could fire on the convoy or battle formations without entering the zone of fire of the ZSU.
        1. 0
          29 September 2018 12: 40
          As a rule, the columns and battle formations were guarded by anti-aircraft missile artillery batteries as part of the Shilok platoon and the Strel-10 platoon.
    2. +2
      27 September 2018 20: 53
      Well, not everything is so bad: yes, the enemies have an ATGM with a range of 28 km, but it’s not at all a fact that the enemy will be able to detect our weapons at such a range (and if he can, then his "senior comrades" will also see him). Calmly storm the column (as in 41), she still will not allow. Shilka steel will be replaced by Tunguska because the Warthog has been made resistant to 23 mm (as I heard).
      1. -1
        28 September 2018 10: 50
        Quote: bk0010
        Well, not everything is so bad: yes, the enemies have ATGMs with a range of 28 km

        Effective range of fire "shilka" - 2,5 km for cannons and 5 km for missiles.
        Effective shooting from this artillery mount is possible at a distance of 2-2,5 kilometers at an initial projectile speed of 950-970 m / s. The unit’s reach in height is 1,5 kilometers. This artillery installation can be effectively used to shell flying targets moving at speeds up to 500 m / s. In the same time when using Igla anti-aircraft guided missiles SAM "Sagittarius" (on a combat vehicle there are 4 of these missiles) target range increases to 5 kilometers, height - up to 3,5 kilometers.

        This does not allow covering the convoys even from air attack weapons armed with the ancient "Hellfires" of the first models, originally from the 80s of the last century, with their 8 km range.
        Quote: bk0010
        It will still not allow calmly storming the column (as in 41).

        And who is going to storm the columns as in the 41st? And what?
        Our potential opponents have only one classic attack aircraft - and that one is now teetering on the brink of being written off and replaced by a "penguin". Moreover, this attack aircraft, even in its basic configuration, carried URO with a range of more than 20 km.
        The last attack aircraft carrying cast iron, NAR and guns is in service with just our Air Force. smile
    3. 0
      28 September 2018 14: 48
      Well, range helicopters may not be enough, and Axes at low altitude just right. Just a grind for them.
  11. +2
    27 September 2018 17: 16
    More than 50 years in service and still poses a threat ...
  12. -1
    27 September 2018 21: 36
    Good ersatz for third world countries. Even with the archer. Well, or third-tier mobile reserve. Good machine, but unfortunately its time is over.
  13. +3
    27 September 2018 22: 25
    Yeah, for the whole gamut of today's drones, Shilochka is a great medicine !!!
    1. +1
      27 September 2018 22: 50
      Only after a strong upgrade. Especially for small drones. And the review needs to be radically improved and programmable blasting for guns sawed. And this is a cardinal rework. I doubt that the Defense Ministry will fork out for a narrow specialist counter-UAV.
      1. 0
        28 September 2018 11: 24
        Quote: garri-lin
        Only after a strong upgrade. Especially for small drones. And the review needs to be radically improved

        Yeah ... at least you need to put a modern optoelectronic complex + radar millimeter-wave range (short range, but good resolution).
        Quote: garri-lin
        and programmable blast for guns

        In 23 mm caliber with "awl" rate of fire? It will be cheaper to cut a new ZSU - 57-mm or 76-mm caliber. At the same time, it will be possible to compensate for the inaccuracy in determining the coordinates of the target with the power of the projectile. smile
        1. 0
          28 September 2018 22: 03
          Small UAVs scouts and drones / kamikazes are too small a target to hit with direct sales even for the rate of shilka.
          An inexpensive programmable detonation will naturally save ammunition and I think it will be economically justified.
  14. 0
    29 September 2018 08: 41
    When will they change the radar? And even better, to do something with him, so that he would not be a tip for missiles.
  15. 0
    30 September 2018 10: 35
    ... beautiful and dangerous .... I always liked this system ... on par with the ZSU-57-2 ...... especially firing .....
  16. 0
    30 September 2018 15: 22
    That would be on the basis of Shilka to make ZSU -57-4. That would be a bomb .... And what a surprise for the adversary ...
  17. +1
    30 September 2018 17: 26
    For wandered through, breaking through the main lines of air defense, Axes and ALCM will be. So to speak, for the direct protection of the same S-300/400 or the objects protected by them, in addition to the Tungusks, Shells
  18. The comment was deleted.
  19. +1
    3 October 2018 18: 44
    Any modernization of domestic weapons - sincerely glad !!! Even if it is at the level of the 70s - 80s of the last century. You can not stand still. But some points I would like to clarify:

    1. The new "Shilka-M4" has 4 x SAM in ammunition. What prevents us from placing another 4 (6-8) missiles somewhere on the hull, albeit as a portable additional ammunition, even with manual reloading. SAM weight is only about 10 kg (respectively + 4 SAM 40 ... 45 kg, + 6 SAM 65 ... 70 kg, etc.) ??? Combat capabilities are increasing !!!

    2. Again about missiles. These are modernized "Needles", the main criterion for the creation of which is the ability to carry the 1st soldier, respectively, and the weight of about 10 kg. From here, such important parameters are already dancing: as the range, the mass of the warhead, etc. What prevents such a heavy system as "Shilka", weighing over 21 tons, from placing heavier missiles, weighing 15 ... 30 kg ??? Accordingly, the range increases by at least 1,5 times and the warhead can be delivered more powerful, which also significantly increases the likelihood of hitting the target. The Shilka guidance systems allow this. Why is the weight 15 ... 30 kg ??? So that 2 crew members could safely reload 15 launchers of the air defense system in 20-4 minutes.

    3. The tactics of actions that were laid in the creation of this system have now changed significantly. "Shilka" is designed for a swift attack or active maneuvering on the battlefield or when moving in a column. In our century there is a great need for conditionally stationary lungs and, most importantly, cheap air defense systems. Why not create an air defense system based on Shilka without a tracked chassis, just a 4-wheeled trailer with a Shilka fighting compartment, with increased ammunition, improved living conditions (for possible permanent combat duty), of course with a diesel generator .. Don't write about "Pantsir", it's completely different ... very expensive ... Here is the criterion for modernization, to extend the life of the system, for cheap !!!
    1. +1
      5 October 2018 14: 59
      Everything is correct, as a cheap and effective means for enhancing object defense
  20. 0
    4 December 2018 13: 55
    If you put, as in Sosna, a round-the-clock noise-protected optoelectronic control system (OESU) for weapons, it will be just a fairy tale.
  21. 0
    27 February 2019 21: 36
    I would like to establish contact with the author of the article and to clarify and supplement something, since I was
    one of the participants in the development and implementation of the TOBOL radar at the UMP.