2012年6月27日水曜日

衝突による駆逐艦2隻の沈没



Information画面でみられる沈没船のリストの昭和17年8月2日のところに、DD HammannとDD Arrowの名前がありました。2隻とも連合軍の駆逐艦ですが、沈没の原因がCollisionとなっていて、沈没地点がそれぞれ、121,166 near Mareと122,164 near Anatomという中1ヘクス離れたところなので、この2隻が衝突してその結果沈没したものと思われます。日本側でも時々衝突する艦船はありますが、これまで衝突のせいで沈没した艦船の経験はないので珍しいなと感じました。
この2艦の衝突・沈没に関してさらに不思議なのは、いったいどうやって沈没したことが日本側に伝わったのかという点です。きっと日本側と同じように連合軍側でも時々衝突事故が起きているんだと思いますが、連合軍艦船の衝突事故が日本側に報らされたことは一度もありません。また、今回の衝突・沈没はCombat report, Combat Events, Operational Report, SIGINT Reportのどれにも載せられていませんでした。沈没地点はルーガンビルの二式大艇の哨戒圏内なので、二式大艇が衝突事故と沈没を目撃したという設定で、日本側にばれてしまったわけでしょうか?気になります。
中国は攻めあぐんでます。長沙から南西に向かう鉄道線の末端の柳州になんとか手を出せないかと思って、増援を送らせないようにするため、柳州の北東隣りのヘクスに独立混成第八旅団を進軍させました。道無き森の中の進軍なので、進軍を指示したのは一ヶ月くらい前だったかと思います。その頃は目的のヘクスの中国軍部隊はそれほどの兵力ではありませんでした。ようやく昨日、目的地に到着してmove modeからcombat modeに変更しておきましたが、中国軍は7万5000名にも増援されていて、果敢に攻撃を仕掛けて来ました。森林の防御効果3倍がありましたが、到着直後でサプライが不足していたそうです。修正前AVが192対2762、銃撃の応酬後の修正AVは41対1862、オッズ比1対45で惨敗を喫してしまいました。死傷者2898名で一ヶ月近くかかった移動は無となり、元のヘクスに追い返されました。我ながら作戦立案能力の拙さにあきれてしまいました。
AFTER ACTION REPORTS FOR Aug 02, 42
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ASW attack near Truk  at 112,109

Japanese Ships
      xAP Yoshino Maru
      DD Urakaze

Allied Ships
      SS Sargo



SS Sargo is sighted by escort
Sargo diving deep ....
DD Urakaze fails to find sub, continues to search...
DD Urakaze fails to find sub, continues to search...
DD Urakaze fails to find sub, continues to search...
DD Urakaze attacking submerged sub ....
DD Urakaze fails to find sub, continues to search...
Escort abandons search for sub


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ASW attack near Singapore  at 51,84

Japanese Ships
      TB Kari

Allied Ships
      SS Snapper



SS Snapper is located by TB Kari
TB Kari fails to find sub, continues to search...
TB Kari fails to find sub, continues to search...
TB Kari fails to find sub, continues to search...
Escort abandons search for sub


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ASW attack near Singapore  at 51,84

Japanese Ships
      TB Kasasagi
      TB Kari

Allied Ships
      SS Snapper, hits 4



SS Snapper launches 2 torpedoes at TB Kasasagi
Snapper bottoming out ....
TB Kari fails to find sub, continues to search...
TB Kari attacking submerged sub ....
TB Kari fails to find sub, continues to search...
TB Kari fails to find sub, continues to search...
TB Kari fails to find sub, continues to search...
Escort abandons search for sub


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ASW attack near Hong Kong  at 78,62

Japanese Ships
      TB Nadeshiko

Allied Ships
      SS Grenadier, hits 1



SS Grenadier is sighted by escort
TB Nadeshiko fails to find sub, continues to search...
TB Nadeshiko attacking submerged sub ....
Escort abandons search for sub


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Morning Air attack on Efate , at 120,154 

Weather in hex: Clear sky

Raid spotted at 17 NM, estimated altitude 9,000 feet.
Estimated time to target is 6 minutes

Japanese aircraft
      H8K1 Emily x 3



No Japanese losses



Aircraft Attacking:
       3 x H8K1 Emily bombing from 6000 feet
               Port Attack:  2 x 250 kg SAP Bomb



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Morning Air attack on Kweilin , at 76,54 

Weather in hex: Moderate rain

Raid spotted at 21 NM, estimated altitude 12,000 feet.
Estimated time to target is 6 minutes

Japanese aircraft
      Ki-30 Ann x 12
      Ki-43-Ic Oscar x 8
      Ki-49-IIa Helen x 17



No Japanese losses



Airbase hits 6
Airbase supply hits 1
Runway hits 23

Aircraft Attacking:
      17 x Ki-49-IIa Helen bombing from 6000 feet
               Airfield Attack:  4 x 250 kg GP Bomb
      12 x Ki-30 Ann bombing from 6000 feet
               Airfield Attack:  1 x 250 kg GP Bomb



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Morning Air attack on NW Australia Base Force, at 76,128 (Katherine)

Weather in hex: Heavy cloud

Raid spotted at 17 NM, estimated altitude 11,000 feet.
Estimated time to target is 4 minutes

Japanese aircraft
      Ki-21-IIa Sally x 18
      Ki-43-Ic Oscar x 21



Japanese aircraft losses
      Ki-21-IIa Sally: 3 damaged


Allied ground losses:
      90 casualties reported
         Squads: 0 destroyed, 3 disabled
         Non Combat: 3 destroyed, 8 disabled
         Engineers: 0 destroyed, 0 disabled


Aircraft Attacking:
      18 x Ki-21-IIa Sally bombing from 6000 feet
               Ground Attack:  4 x 250 kg GP Bomb



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Afternoon Air attack on Imphal , at 60,40 

Weather in hex: Overcast

Raid detected at 40 NM, estimated altitude 9,000 feet.
Estimated time to target is 12 minutes

Japanese aircraft
      Ki-43-Ic Oscar x 15
      Ki-49-IIa Helen x 57



Japanese aircraft losses
      Ki-49-IIa Helen: 14 damaged
      Ki-49-IIa Helen: 1 destroyed by flak


Allied ground losses:
      6 casualties reported
         Squads: 0 destroyed, 0 disabled
         Non Combat: 0 destroyed, 1 disabled
         Engineers: 0 destroyed, 0 disabled


Airbase hits 5
Airbase supply hits 2
Runway hits 38

Aircraft Attacking:
      13 x Ki-49-IIa Helen bombing from 6000 feet
               Airfield Attack:  4 x 250 kg GP Bomb
      14 x Ki-49-IIa Helen bombing from 6000 feet
               Airfield Attack:  4 x 250 kg GP Bomb
      13 x Ki-49-IIa Helen bombing from 6000 feet
               Airfield Attack:  4 x 250 kg GP Bomb
      16 x Ki-49-IIa Helen bombing from 6000 feet
               Airfield Attack:  4 x 250 kg GP Bomb



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Afternoon Air attack on Lashio , at 62,46 

Weather in hex: Light cloud

Raid detected at 39 NM, estimated altitude 12,000 feet.
Estimated time to target is 11 minutes

Japanese aircraft
      Ki-43-Ic Oscar x 6



Allied aircraft
      B-17E Fortress x 9
      LB-30 Liberator x 4
      B-25C Mitchell x 6


Japanese aircraft losses
      Ki-43-Ic Oscar: 1 destroyed
      Ki-46-II Dinah: 1 destroyed on ground
      Ki-15-II Babs: 1 destroyed on ground

Allied aircraft losses
      B-17E Fortress: 3 damaged
      LB-30 Liberator: 3 damaged
      B-25C Mitchell: 3 damaged



Airbase hits 10
Airbase supply hits 3
Runway hits 28

Aircraft Attacking:
       9 x B-17E Fortress bombing from 7000 feet
               Airfield Attack:  8 x 500 lb GP Bomb
       3 x B-25C Mitchell bombing from 7000 feet * 
               Airfield Attack:  3 x 500 lb GP Bomb
       4 x LB-30 Liberator bombing from 7000 feet
               Airfield Attack:  8 x 500 lb GP Bomb
       3 x B-25C Mitchell bombing from 7000 feet * 
               Airfield Attack:  3 x 500 lb GP Bomb

CAP engaged:
47th I.F.Chutai with Ki-43-Ic Oscar (2 airborne, 4 on standby, 0 scrambling)
      2 plane(s) intercepting now.
      Group patrol altitude is 6000 , scrambling fighters between 2000 and 6000.
      Time for all group planes to reach interception is 5 minutes



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ASW attack near Miyake-jima  at 112,63

Japanese Ships
      PB Shinko Maru #2
      xAK Burma Maru

Allied Ships
      SS Gar



SS Gar launches 2 torpedoes at PB Shinko Maru #2
Gar bottoming out ....
PB Shinko Maru #2 fails to find sub, continues to search...
PB Shinko Maru #2 fails to find sub, continues to search...
PB Shinko Maru #2 fails to find sub, continues to search...
PB Shinko Maru #2 fails to find sub, continues to search...
PB Shinko Maru #2 fails to find sub, continues to search...
Escort abandons search for sub


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Ground combat at Kweilin (76,54)

Japanese Bombardment attack

Attacking force 27171 troops, 463 guns, 84 vehicles, Assault Value = 885

Defending force 72343 troops, 411 guns, 0 vehicles, Assault Value = 2543

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


Allied ground losses:
      21 casualties reported
         Squads: 0 destroyed, 3 disabled
         Non Combat: 0 destroyed, 0 disabled
         Engineers: 0 destroyed, 0 disabled


Assaulting units:
    104th Division
    17th Division
    51st Engineer Regiment
    51st Ind.Mtn.Gun Battalion
    2nd Ind. Mountain Gun Regiment
    14th Medium Field Artillery Regiment
    1st Mortar Battalion
    15th Ind.Medium Field Artillery Regiment
    4th Mortar Battalion
    52nd Ind.Mtn.Gun Battalion
    21st Mortar Battalion
    2nd Mortar Battalion

Defending units:
    38th Chinese Corps
    49th Chinese Corps
    69th Chinese Corps
    21st Chinese Corps
    65th Chinese Corps
    64th Chinese Corps
    12th Chinese Corps
    50th Chinese Corps
    29th Chinese Corps
    15th Chinese Corps
    100th Chinese Corps
    25th Chinese Corps
    5th Chinese Cavalry Corps
    10th Group Army
    3rd War Area 
    4th War Area 
    2nd Chinese Base Force
    9th Group Army
    7th Artillery Regiment


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Ground combat at 81,56 (near Kanhsien)

Japanese Bombardment attack

Attacking force 12746 troops, 102 guns, 0 vehicles, Assault Value = 459

Defending force 7766 troops, 0 guns, 0 vehicles, Assault Value = 6



Assaulting units:
    116th Division

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


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Ground combat at Nanyang (85,45)

Japanese Bombardment attack

Attacking force 61977 troops, 605 guns, 246 vehicles, Assault Value = 2184

Defending force 167136 troops, 720 guns, 0 vehicles, Assault Value = 4806

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


Allied ground losses:
      66 casualties reported
         Squads: 1 destroyed, 9 disabled
         Non Combat: 0 destroyed, 0 disabled
         Engineers: 0 destroyed, 0 disabled


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

Defending units:
    3rd Chinese Corps
    82nd Chinese Corps
    1st Chinese Corps
    92nd Chinese Corps
    57th Chinese Corps
    36th Chinese Corps
    34th Chinese Corps
    55th Chinese Corps
    41st Chinese Corps
    76th Chinese Corps
    47th Chinese Corps
    77th Chinese Corps
    34th Separate Brigade
    61st Chinese Corps
    33rd Chinese Corps
    91st Chinese Corps
    16th Chinese Corps
    43rd Chinese Corps
    17th Chinese Corps
    90th Chinese Corps
    30th Chinese Corps
    4th Chinese Cavalry Corps
    4th Group Army
    7th Group Army
    19th Chinese Base Force
    Red Chinese Army
    2nd Group Army
    5th War Area 
    2nd War Area 
    22nd Group Army
    8th Group Army
    34th Group Army
    4th Construction Regiment


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Ground combat at 75,54 (near Kweilin)

Allied Deliberate attack

Attacking force 74795 troops, 353 guns, 0 vehicles, Assault Value = 2762

Defending force 5485 troops, 38 guns, 0 vehicles, Assault Value = 192

Allied adjusted assault: 1860 

Japanese adjusted defense: 41 

Allied assault odds: 45 to 1 

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

Japanese ground losses:
      2898 casualties reported
         Squads: 69 destroyed, 132 disabled
         Non Combat: 31 destroyed, 20 disabled
         Engineers: 2 destroyed, 10 disabled
      Guns lost 27 (8 destroyed, 19 disabled)
      Units retreated 1


Allied ground losses:
      940 casualties reported
         Squads: 5 destroyed, 116 disabled
         Non Combat: 0 destroyed, 13 disabled
         Engineers: 0 destroyed, 4 disabled
      Guns lost 4 (1 destroyed, 3 disabled)


Defeated Japanese Units Retreating!

Assaulting units:
    81st Chinese Corps
    79th Chinese Corps
    4th Chinese Corps
    11th Chinese Corps
    46th Chinese Corps
    84th Chinese Corps
    13th Chinese Corps
    85th Chinese Corps
    27th Chinese Corps
    2nd Chinese Cavalry Corps
    19th Group Army
    15th Group Army
    17th Group Army
    39th Group Army

Defending units:
    8th Ind.Mixed Brigade




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