2012年8月16日木曜日

またマダンで2隻のPBが沈没

昭和17年9月16日、トラックからサプライを輸送してきたFast Transport TFがマダンで陸揚げ中に14機のA-24 Bansheeに攻撃されました。A-24 BansheeはSBD Dauntlessをアメリカ陸軍航空隊が使用したものです。高度17000フィートで接近し、レーダーが17分前に探知したのですが、ニューギニア東部上空に日本機はなし。急降下爆撃でPB Nako Maru #2に1000ポンド爆弾4発、PB Kaikei Maruに3発が命中して2隻とも沈没しました。最高速度14ノットで、Fast Transport任務でサプライを1000トンも積載できるAnsyu xPB級をまた2隻失ってしまいました。ニューギニア東部へサプライを輸送する艦船を連合軍の航空攻撃から守るうまい手だてを思い付きません。ラバウルからサプライを空輸をしているのに加えて、潜水艦で送るくらいでしょうか。でも潜水艦はほんのわずかしか運べないし。

トラックからラバウルへサプライを輸送するコンボイもブナからのB-25C Mitchellに攻撃されましたが、ラバウルでCAPしていたゼロ戦(A6M2)が1機駆けつけたことと、B-25も3機だけだったので狙われたxAKL Indus Maruへの命中弾ゼロで戦闘を終えることができました。ラバウルではそれなりの数の戦闘機がCAPしているはずで、しかもラバウルに入港するコンボイを守るためrange 2を指示してあります。もっとたくさんのCAP機が救援に駆けつけてほしかったところですが、コンボイにレーダー装備艦がなく、目視で2分前の探知ですから、近くにいた1機が対応できただけだったんでしょうね。ラバウルへのコンボイにはレーダー装備艦を護衛につけるべきかな。

先日のエントリーでカルカッタの飛行場にauxilary 122機と多数の存在が報告されたことに触れました。連合軍の輸送機は主に中国へのサプライ輸送に従事しているものと思っていましたが、カルカッタのauxilaryの一部が輸送機だとすればアキャブへサプライを空輸しているんじゃないだろうかと思い付きました。まだ雨期で、鉄道が通じているのにビルマ北部へのサプライ輸送には苦労しています。小道しか通じていないアキャブへのサプライ輸送も順調ではないだろうから、もしかすると空輸もしているのかなと考えたわけです。そこで昨日はMagweの二式戦の一個飛行隊42機にアキャブへのLRCAP 100%を指示してみました。輸送機は空戦アニメーションには登場せず、空輸フェーズにしか飛ばない仕様です。リプレイを見ていると空輸フェーズに
Transports flying to Akyab intercepted
と表示されました。予想通りです。一個飛行隊の全力を挙げての迎撃ですから、さぞやたくさんの敵輸送機を撃墜できただろうと思ってTrackerをみてみると、戦果はC-47 SkytrainのOps loss 1機のみでした。Ops loss 1機はふだんでもみかけることなので、実質的には戦果ゼロだと思います。このLRCAPをしばらく続ければ敵輸送機の機体のfatigue値が蓄積していって、だんだんとOps lossが増えてゆくのかも知れません。でもMagweから距離4ヘクスしかないアキャブ上空のLRCAPでも100%を指示すると一日で二式戦部隊のfatigueは23まで上昇してしまいます。いったん休養をとらせて、LRCP 40%, Rest 40%くらいで続けることにするかどうか、考えてみたいと思います。

そしてリプレイ後のマップに発見したのがオーストラリア西岸沖のこの連合軍TF。ここはチモール島クーパンの陸攻の哨戒圏の外ですが、たまたま潜水艦が発見してくれました。軽巡と駆逐艦各1の存在を報告してきていますが、進行方向は不明です。なぜこんなところにいるのか気になります。すぐ近くのPort Headlandには、パースを偵察するために二式大艇3機の支隊を配置してあります。そこの艦砲射撃でもするつもりでしょうか??
AFTER ACTION REPORTS FOR Sep 16, 42
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ASW attack near Truk  at 111,109

Japanese Ships
      DD Yugumo
      DD Takanami

Allied Ships
      SS Searaven



SS Searaven launches 2 torpedoes at DD Yugumo
Searaven diving deep ....
DD Takanami fails to find sub, continues to search...
DD Takanami fails to find sub, continues to search...
DD Takanami attacking submerged sub ....
DD Takanami attacking submerged sub ....
DD Takanami is out of ASW ammo
DD Takanami attacking submerged sub ....
DD Takanami is out of ASW ammo
DD Takanami is out of ASW ammo
DD Takanami is out of ASW ammo
DD Takanami is out of ASW ammo
DD Takanami is out of ASW ammo
Escort abandons search for sub


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ASW attack near Truk  at 111,109

Japanese Ships
      DD Naganami
      DD Yugumo

Allied Ships
      SS Seal



SS Seal is located by DD Naganami
Seal diving deep ....
DD Yugumo fails to find sub, continues to search...
DD Yugumo fails to find sub, continues to search...
DD Yugumo fails to find sub, continues to search...
DD Yugumo fails to find sub, continues to search...
DD Yugumo fails to find sub, continues to search...
Escort abandons search for sub


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Sub attack near Moulmein  at 54,55

Japanese Ships
      AK Nako Maru
      PB Sansei Maru

Allied Ships
      SS KVII, hits 2



SS KVII launches 2 torpedoes at AK Nako Maru
PB Sansei Maru fails to find sub, continues to search...
PB Sansei Maru attacking submerged sub ....
PB Sansei Maru fails to find sub, continues to search...
PB Sansei Maru fails to find sub, continues to search...
PB Sansei Maru fails to find sub, continues to search...
Escort abandons search for sub


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Sub attack near Koggala  at 31,51

Japanese Ships
      SS I-158, hits 7,  heavy damage

Allied Ships
      KV Thyme
      KV Auricula



SS I-158 launches 2 torpedoes at KV Thyme
I-158 diving deep ....
KV Auricula fails to find sub, continues to search...
KV Auricula attacking submerged sub ....
KV Auricula attacking submerged sub ....
KV Auricula fails to find sub, continues to search...
KV Auricula fails to find sub, continues to search...
Escort abandons search for sub


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Sub attack near Balikpapan  at 66,98

Japanese Ships
      SC Ch 27
      SC Ch 33

Allied Ships
      SS KXVI



SS KXVI launches 2 torpedoes at SC Ch 27
SC Ch 33 fails to find sub, continues to search...
SC Ch 33 fails to find sub, continues to search...
SC Ch 33 fails to find sub, continues to search...
SC Ch 33 fails to find sub, continues to search...
SC Ch 33 fails to find sub, continues to search...
Escort abandons search for sub


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Morning Air attack on Merauke , at 89,124 

Weather in hex: Moderate rain

Raid spotted at 37 NM, estimated altitude 15,000 feet.
Estimated time to target is 12 minutes

Japanese aircraft
      A6M2 Zero x 33
      G4M1 Betty x 29



Japanese aircraft losses
      G4M1 Betty: 2 damaged
      G4M1 Betty: 1 destroyed by flak



Runway hits 2

Aircraft Attacking:
      20 x G4M1 Betty bombing from 11000 feet
               Airfield Attack:  2 x 250 kg GP Bomb,  4 x 60 kg GP Bomb
       9 x G4M1 Betty bombing from 11000 feet
               Airfield Attack:  2 x 250 kg SAP Bomb,  4 x 60 kg GP Bomb



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Morning Air attack on Liuchow , at 74,55 

Weather in hex: Overcast

Raid spotted at 37 NM, estimated altitude 11,000 feet.
Estimated time to target is 11 minutes

Japanese aircraft
      Ki-21-IIa Sally x 36
      Ki-43-Ic Oscar x 8
      Ki-49-IIa Helen x 17



Japanese aircraft losses
      Ki-21-IIa Sally: 1 damaged


Allied ground losses:
      223 casualties reported
         Squads: 1 destroyed, 23 disabled
         Non Combat: 0 destroyed, 11 disabled
         Engineers: 0 destroyed, 1 disabled


Airbase hits 5
Airbase supply hits 8
Runway hits 23

Aircraft Attacking:
      17 x Ki-49-IIa Helen bombing from 6000 feet
               Airfield Attack:  4 x 250 kg GP Bomb
      19 x Ki-21-IIa Sally bombing from 6000 feet
               Ground Attack:  4 x 250 kg GP Bomb
      17 x Ki-21-IIa Sally bombing from 6000 feet
               Ground Attack:  4 x 250 kg GP Bomb

Also attacking 13th Chinese Corps ...
Also attacking 81st Chinese Corps ...
Also attacking Liuchow  ...
Also attacking 4th Chinese Corps ...
Also attacking 14th Chinese Corps ...
Also attacking Liuchow  ...
Also attacking 65th Chinese Corps ...
Also attacking 25th Chinese Corps ...
Also attacking Liuchow  ...
Also attacking 11th Chinese Corps ...
Also attacking 27th Chinese Corps ...
Also attacking Liuchow  ...
Also attacking 95th Chinese Corps ...
Also attacking 7th Chinese Corps ...
Also attacking Liuchow  ...
Also attacking 85th Chinese Corps ...
Also attacking 3rd Prov Chinese Corps ...


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Morning Air attack on 3rd Group Army, at 89,46 , near Kweiteh

Weather in hex: Clear sky

Raid spotted at 38 NM, estimated altitude 11,000 feet.
Estimated time to target is 10 minutes

Japanese aircraft
      Ki-30 Ann x 10



No Japanese losses


Allied ground losses:
      42 casualties reported
         Squads: 0 destroyed, 0 disabled
         Non Combat: 0 destroyed, 5 disabled
         Engineers: 0 destroyed, 0 disabled


Aircraft Attacking:
      10 x Ki-30 Ann bombing from 6000 feet * 
               Ground Attack:  1 x 100 kg GP Bomb

Also attacking Lusu War Area  ...
Also attacking 3rd Group Army ...


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Morning Air attack on Chittagong , at 55,41 

Weather in hex: Heavy cloud

Raid detected at 107 NM, estimated altitude 14,000 feet.
Estimated time to target is 34 minutes

Japanese aircraft
      Ki-43-IIa Oscar x 8
      Ki-49-IIa Helen x 28



Japanese aircraft losses
      Ki-49-IIa Helen: 21 damaged
      Ki-49-IIa Helen: 1 destroyed by flak



Airbase supply hits 1
Runway hits 14

Aircraft Attacking:
      14 x Ki-49-IIa Helen bombing from 11000 feet
               Airfield Attack:  4 x 250 kg GP Bomb
      14 x Ki-49-IIa Helen bombing from 11000 feet
               Airfield Attack:  4 x 250 kg GP Bomb



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Morning Air attack on TF, near Madang at 97,123

Weather in hex: Overcast

Raid detected at 38 NM, estimated altitude 17,000 feet.
Estimated time to target is 14 minutes


Allied aircraft
      A-24 Banshee x 14
      P-40E Warhawk x 5


No Allied losses

Japanese Ships
      PB Nako Maru #2, Bomb hits 4,  heavy fires,  heavy damage
      PB Kaikei Maru, Bomb hits 3,  heavy fires,  heavy damage



Aircraft Attacking:
       6 x A-24 Banshee releasing from 3000'
               Naval Attack:  1 x 1000 lb SAP Bomb
       4 x A-24 Banshee releasing from 2000'
               Naval Attack:  1 x 1000 lb SAP Bomb
       4 x A-24 Banshee releasing from 4000'
               Naval Attack:  1 x 1000 lb SAP Bomb

Heavy smoke from fires obscuring PB Kaikei Maru
Heavy smoke from fires obscuring PB Nako Maru #2


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Morning Air attack on Chittagong , at 55,41 

Weather in hex: Heavy cloud

Raid detected at 40 NM, estimated altitude 14,000 feet.
Estimated time to target is 12 minutes

Japanese aircraft
      Ki-43-Ic Oscar x 24
      Ki-49-IIa Helen x 19



Japanese aircraft losses
      Ki-49-IIa Helen: 7 damaged



Airbase hits 5
Runway hits 6

Aircraft Attacking:
      19 x Ki-49-IIa Helen bombing from 11000 feet
               Airfield Attack:  4 x 250 kg GP Bomb



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Afternoon Air attack on Merauke , at 89,124 

Weather in hex: Overcast

Raid spotted at 9 NM, estimated altitude 22,000 feet.
Estimated time to target is 2 minutes

Japanese aircraft
      A6M3b Zero x 15



No Japanese losses



Aircraft Attacking:
      15 x A6M3b Zero sweeping at 20000 feet



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Afternoon Air attack on Madang , at 97,123 

Weather in hex: Heavy rain

Raid detected at 36 NM, estimated altitude 13,000 feet.
Estimated time to target is 12 minutes


Allied aircraft
      Mitchell II x 6
      Bolingbroke IV x 9
      P-40E Warhawk x 5


No Allied losses



Port hits 1

Aircraft Attacking:
       9 x Bolingbroke IV bombing from 7000 feet
               Port Attack:  4 x 250 lb GP Bomb
       6 x Mitchell II bombing from 7000 feet
               Port Attack:  6 x 500 lb GP Bomb



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Afternoon Air attack on TF, near Lihir at 108,124

Weather in hex: Moderate rain

Raid spotted at 8 NM, estimated altitude 3,000 feet.
Estimated time to target is 2 minutes

Japanese aircraft
      A6M2 Zero x 1



Allied aircraft
      B-25C Mitchell x 3


No Japanese losses

No Allied losses

Japanese Ships
      xAKL Indus Maru



Aircraft Attacking:
       3 x B-25C Mitchell bombing from 1000 feet
               Naval Attack:  3 x 500 lb SAP Bomb

CAP engaged:
1st Ku S-1 with A6M2 Zero (1 airborne, 0 on standby, 0 scrambling)
      (1 plane(s) diverted to support CAP in hex.)
      1 plane(s) intercepting now.
      Group patrol altitude is 11000 
      Raid is overhead



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Ground combat at Nanyang (85,45)

Japanese Bombardment attack

Attacking force 61953 troops, 605 guns, 246 vehicles, Assault Value = 2184

Defending force 166436 troops, 670 guns, 0 vehicles, Assault Value = 5043

Japanese ground losses:
      31 casualties reported
         Squads: 1 destroyed, 1 disabled
         Non Combat: 0 destroyed, 0 disabled
         Engineers: 0 destroyed, 0 disabled


Allied ground losses:
      79 casualties reported
         Squads: 0 destroyed, 8 disabled
         Non Combat: 0 destroyed, 0 disabled
         Engineers: 0 destroyed, 0 disabled


Assaulting units:
    110th Division
    70th Division
    35th Division
    36th Division
    32nd Division
    Botanko Hvy Gun Regiment
    2nd Ind.Hvy.Art. Battalion
    3rd Ind.Hvy.Art. Battalion
    10th Ind. Mountain Gun Regiment
    6th Medium Field Artillery Regiment
    12th Army
    20th Ind. Mtn Gun Battalion
    11th Field Artillery Regiment

Defending units:
    23rd Chinese Corps
    1st Chinese Corps
    77th Chinese Corps
    61st Chinese Corps
    57th Chinese Corps
    76th Chinese Corps
    41st Chinese Corps
    34th Chinese Corps
    3rd Chinese Corps
    91st Chinese Corps
    82nd Chinese Corps
    36th Chinese Corps
    47th Chinese Corps
    19th Chinese Corps
    16th Chinese Corps
    33rd Chinese Corps
    90th Chinese Corps
    17th Chinese Corps
    92nd Chinese Corps
    4th Chinese Cavalry Corps
    6th Group Army
    2nd War Area 
    4th Group Army
    Red Chinese Army
    22nd Group Army
    7th Group Army
    8th Group Army
    5th War Area 
    34th Group Army
    19th Chinese Base Force


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Ground combat at 81,56 (near Kanhsien)

Japanese Deliberate attack

Attacking force 1098 troops, 4 guns, 0 vehicles, Assault Value = 179

Defending force 7848 troops, 0 guns, 0 vehicles, Assault Value = 6

Japanese adjusted assault: 10 

Allied adjusted defense: 35 

Japanese assault odds: 1 to 3 

Combat modifiers
Defender: terrain(+), experience(-), supply(-)
Attacker: 

Japanese ground losses:
      17 casualties reported
         Squads: 0 destroyed, 3 disabled
         Non Combat: 0 destroyed, 0 disabled
         Engineers: 0 destroyed, 0 disabled


Allied ground losses:
      30 casualties reported
         Squads: 0 destroyed, 0 disabled
         Non Combat: 0 destroyed, 5 disabled
         Engineers: 0 destroyed, 0 disabled


Assaulting units:
    11th Indpt Infantry Regiment
    8th NCPC Infantry Brigade

Defending units:
    70th Chinese Corps
    12th Group Army
    7th War Area 
    28th Chinese Corps
    63rd Chinese Corps
    86th Chinese Corps




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