American dwarf kamikaze, or the story of one bomb strike

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American dwarf kamikaze, or the story of one bomb strike
The main characters of the publication are the BAT glide bomb and the Ukuru-type kaibokan.

Kaibokan (Japanese: 海防艦 kaibokan, “coastal defense ship”) became real workhorses in the Imperial navy Japan. These ships accompanied convoys and hunted for submarines. They were closest in their functions and characteristics to such classes as frigate and destroyer escort in the fleets of their opponents in the Pacific theater of operations.

In total, more than 170 ships of this type, of all classes, entered service. Not as many as the same frigates and escort destroyers among the Allies, but still it was a more than massive type of ship.




The ceremony of launching the main kaibokan of the series. Actually, “Ukuru” himself, May 15, 1944.

The ships' armament mainly consisted of 120 mm Type 3 guns, 25 mm Type 96 anti-aircraft guns and bomb releasers. Fighting off planes and hunting submarines are the main activities of these ships for most of their service. True, by 1945 the hunter himself had long ago turned into prey. For example, of the D-type kaibokans that died during the war, most were sunk by the army or navy. aviation...or submarines. Yes, the American submarine itself actively hunted its opponents, but this is a completely different matter. story.

Our hero is an Ukuru-class escort ship. Laid down at the Tsurumi shipyard in Yokohama on February 15, 1944, launched on September 21, 1944, and entered service in the Kure Naval District on December 2, 1944. The ship was named "Aguni" (an island in Okinawa Prefecture).

In January 1945, the ship was assigned to the First Division of Escort Forces and on January 21 arrived in Tokuyama to its place of permanent deployment. To put it very roughly, by the time the ship entered service, its further fate most likely represented a choice: a torpedo - one, or a bomb through the porthole.


Kaibokan and top-mast bombing of Army North American B-25 Mitchells off the coast of Indochina, April 1945. It is clearly visible that there is no one at the anti-aircraft guns, and the sailors are lying side by side on the deck or hiding behind the superstructure. Before starting the actual bombing, the planes sprayed the ship with a 50-caliber machine gun from the bow battery. So, when the bombers actually made their bombing approach, there was often no one left on deck to man the anti-aircraft guns.

In general, this is how it all turned out.

Kamikaze dwarf


The fatal date was May 27, 1945. The ship was at sea off the coast of Korea. An airplane appeared on the horizon. The target was single and quite small in size. It seemed that the plane was coming in to attack the kaibokan, but did not start spraying the deck and superstructure from the battery with a machine gun; it was clearly (judging by its size) not a torpedo bomber, and there were no suspended bombs visible.

Meanwhile, the plane, heading straight for the ship, crashed into the side at the bow just above the waterline. Kaibokan was rocked by a terrible explosion. The bow of the ship up to the bow gun turret was torn off. A fifth of the crew (2 officers and 33 sailors) died.

The crew began to fight for survivability and, with the support of other ships of the convoy, were able to bring the ship to the port of Busan, and the kaibokan was sailing stern first. The ship was able to be dragged to a shipbuilding plant in the city of Maizuru. The damage was such that the repairs that had begun were not completed until the end of the war. The ship surrendered to the allies at the dock and was cut into metal there in 1948.

The surviving officers from the ship's crew, naturally, had to write reports and answer about the reasons for what happened to their superiors. And everyone said the same thing - we were attacked by a small plane... a kamikaze.

What happened in reality?


In fact, this was one of the most successful (if not the most successful) use by the Americans of the ASM-N-2 Bat gliding, homing, air-launched anti-ship bomb. Yes, there were other targets hit and ships sunk. But the kaibokan turned out to be the largest ship hit by the “bat”. The bomb was the crowning achievement of the program to develop a guided anti-ship weapon. weapons – SWOD (Special Weapons Ordnance). It had its own radar and was aimed at the target after launch independently. That is, “let it go and forget it,” and this was in the spring of 1945.


"Bat" in section. Probably the most technically complex ammunition used in World War II. Exhibit at the China Lake Museum, Ridgecrest, California.

The bomb was launched from the Consolidated PB4Y-2 Privateer maritime patrol bomber of the 109th Patrol Bombing Squadron (Patrol Bombing Squadron 109 - VPB-109). The unit was formed during the war, but by 1945 it already had extensive combat experience, had perfectly mastered the materiel, and was more than deserved.

Moreover, the crew of Lieutenant Commander George Hicks, who was responsible for making the Aguni officers believe in the existence of dwarf kamikaze pilots in the US Navy, already had experience using the latest ammunition. Hicks' crew attacked Japanese coasters twice in April 1945 in Balikpapan Bay.

True, the Americans themselves stated that they hit the destroyer. And although they did not see the sinking of the ship, the Japanese drove away a couple of patrol bombers with fire from 120-mm universal guns (Aguni was paired with another kaibokan), the ship was recorded as sunk. Why feel sorry for the enemy, especially on the pages of reports?


Consolidated PB4Y-2 Privateer from VPB-109 in flight with a pair of ASM-N-2 Bats under the wings.

It is clear that none of the kaibokan officers could even approximately imagine the technological level at which America was in 1945 and what a colossal gap actually existed between Japan and the United States. But it’s still funny that the first thing they thought of was that the Americans had found suicide dwarfs to put them in small bombs with wings and let them into Japanese ships.

On the other hand, it was hard to imagine that the enemy had created a bomb that aimed at the target independently, but everyone had already heard about kamikazes. Plus, it fit well into the framework of official Japanese propaganda with stories like - criminals and mentally ill people are forcibly sent to the Marine Corps.

In general, official propaganda, which sometimes created the image of a foolish enemy, played a cruel joke on the soldiers and officers of the warring army, dulling their vigilance regarding the danger posed by the enemy, and ultimately undermining faith in the official information coming from the authorities, but this is as usual , a completely different story.
26 comments
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  1. +6
    20 December 2023 05: 02
    In principle, the article is interesting, but this is an example of illiteracy, or, I hope, typos:
    Total ships of this type, all classes

    this class, all types!
  2. +11
    20 December 2023 07: 56
    Interesting, thanks to the Author. I read about German gliding bombs, but this is the first time about American ones, and even homing ones.

    IMHO, the technical level of German acoustic homing torpedoes was comparable to these bombs.
  3. +8
    20 December 2023 08: 49
    To put it very roughly, by the time the ship entered service, its further fate most likely represented a choice: a torpedo - one, or a bomb through the porthole.

    Monsieur knows a lot about naval mysteries. hi
  4. +3
    20 December 2023 08: 52
    "Bat" in section.

    Where's the glitch? belay
    1. +6
      20 December 2023 11: 43
      Where's the glitch?

      In the accompanying diagram the explosive is labeled "1000 LB BOMB". (450 kg).
      1. +9
        20 December 2023 17: 29
        Quote: Dekabrist
        In the accompanying diagram the explosive is labeled "1000 LB BOMB". (450 kg).

        Thank you.
        Geez, there's a FAB-500 inside. belay
        Solid stuff.
      2. +9
        20 December 2023 17: 35
        Quote: Dekabrist
        In the accompanying diagram the explosive is labeled "1000 LB BOMB". (450 kg).

        A sort of ancestor of the JDAM: a standard 1000-pound cast iron bomb with a homing kit attached. smile
  5. +7
    20 December 2023 09: 20
    The use of the Bat on May 27, 1945 is probably the most successful use of this type of weapon; according to experts, its effectiveness was 50 to 50. The ASM-N-2 Bat was withdrawn from service in 1953. The remaining projects of the SWOD program did not receive their development.
    1. +8
      20 December 2023 12: 06
      Quote: parusnik
      Its effectiveness was 50/50.

      As if in our times it’s not a zero result at all, and even then it’s even better.
    2. +1
      21 December 2023 18: 10
      I wonder why they didn’t get it? After all, a new word in technology and with further development the efficiency could increase, the cost was high, so we decided to save.
  6. +12
    20 December 2023 12: 16
    It is clear that none of the kaibokan officers could even approximately imagine the technological level at which America was in 1945 and what a colossal gap actually existed between Japan and the United States.

    Here the author, “in a propanandist fervor”, clearly had too much. At that time, the Japanese were lagging behind, but already had air-to-surface guided missiles, both radio-controlled and with homing systems. Only the Japanese Ke-Go did not have an active radar seeker, like the American ASM-N-2 Bat, but a passive thermal one.
    After the war, Japanese missiles were carefully studied by the Americans. Therefore, the author got excited about the “colossal gap”.
    1. +1
      20 December 2023 19: 06
      What does “already existed” mean? Ke-Go failed the tests and went into revision, which was never completed until the end of the war. The army abandoned the Ki-147, since there was no carrier that in 1944 would not simply be a target for American air defense and fighters. The Ki-148 was tested for so long (either the servo drive was finished off with a file, or the control system failed), and it took a long time to build that, despite a series of almost 200 missiles, they never reached the front. That is, it’s like in the joke - “de jure we have three million dollars, but de facto...”
      1. +4
        20 December 2023 19: 13
        What does “already existed” mean?

        And that means that there were. The fact that they did not enter service is another matter. But what the Japanese had independently developed by that time and brought to the testing stage of essentially anti-ship missiles is “this is a fact,” as a character in one once popular film said.
        1. +4
          20 December 2023 19: 57
          Unfortunately, “it’s a different matter,” which just speaks of the technological backwardness of the Japanese. To be considered an anti-ship missile, you also need to... hit ships. In one case, this could not be achieved even during testing, and in another, they were unable to complete the tests on time and equip combat units with ammunition. Apparently realizing that they did not have time for such suffering, the fleet simply bought the Henschel Hs 293 from the Germans with all the documentation.
          1. +3
            20 December 2023 20: 17
            Unfortunately, “it’s a different matter,” which just speaks of technological lag

            And no one argues that there was a technological lag in Japan, but not “colossal.” Therefore, to say that the Japanese “could not even approximately imagine” the level of the Americans is a clear hyperbole.
            1. 0
              20 December 2023 20: 52
              And that’s not what’s written in the article. It is written that none of the ordinary officers of the fleet could imagine. The rest is your guess...
              1. +3
                20 December 2023 22: 03
                What could you not imagine? What didn't happen? Or were rank-and-file officers more aware of the latest developments in other navies?
                You will not agree that technical articles are incompatible with fiction.
                1. 0
                  20 December 2023 22: 52
                  The above is neither a technical article nor fiction... And it is difficult to agree with or challenge the last statement, given that it is being heard here for the first time.
      2. 0
        7 January 2024 15: 02
        No matter how it “failed,” there was no “collossal rupture.”
  7. +7
    20 December 2023 12: 55
    Good article on a topic unfamiliar to me, do you think this bomb was better or the German one that sank the Italian battleship ROMA?
    1. +4
      20 December 2023 14: 16
      was the bomb better or German?
      The German one could be easily suppressed (we learned almost immediately) and the guidance could be disrupted by attacking the plane with the operator, so the American one was better.
    2. +6
      20 December 2023 14: 22
      Was this bomb better or the German one that sank the Italian battleship ROMA?

      The German Fritz X was controlled by radio by an operator. That is, the operator required constant visual contact with the target, and the aircraft on which the operator was located had to maintain a certain speed and course, remaining vulnerable to both anti-aircraft artillery and fighters.
      And the ASM-N-2 Bat had an autonomous radar seeker and could be dropped outside the air defense range. We got into the same kaibokan "Aguni" about which in the article from 37 km.
      How Fritz X was controlled - in the video from about 3.40.

    3. +5
      20 December 2023 17: 37
      Quote from: Semovente7534
      Good article on a topic unfamiliar to me, do you think this bomb was better or the German one that sank the Italian battleship ROMA?

      The classes are different. "Bat" is better compared with Henschel's UAB HS 293 series.
      1. +4
        20 December 2023 19: 20
        Thanks for the answers, greetings from Italy.
  8. The comment was deleted.
  9. +5
    20 December 2023 19: 48
    his fate most likely represented a choice: by torpedo - once
    ...or a fork in the eye!
  10. +1
    23 March 2024 02: 05
    Technical achievements in US weapons in WWII are very significant, about homing bombs during WWII I'm hearing it for the first time...
    Thanks to the author for the article.
    hi