OS2U

Introduction

Vought社が開発した艦載観測機です。水上機タイプの本機は、米海軍の水上艦に搭載され、
Iowa級をはじめ、戦艦や巡洋艦等の目として索敵等に運用されました。

This is an observation plane developed by Vought. This seaplane was equipped by USN surface ships,
and utilized by battleships and cruisers beginning with the Iowa-class for enemy detection.

Notes

How To Obtain

Stock equipment of Iowa Kai

From quests: B147 (choice)

From limited-time quests: SB19 (choice)

Akashi's Improvement Arsenal

Type	Name	★	Resource							Day							2nd Ship	Note
Type	Name	★								Sun	Mon	Tue	Wed	Thu	Fri	Sat	2nd Ship	Note
	OS2U	0	80	30	0	320	5/6	2/3	1x	C	X	X	I H	I H	C	C	Colorado Iowa Houston
		6					6/9	3/5	2x
		10					-	-	-

12cm Single Gun Mount (Kai 2) • 12.7cm Twin Gun Mount (Model A • Model A Kai 2 • Proto Long-barrel Model A Kai 4 • Model B Kai 2 • Model C Kai 2 • Model C Kai 3 • Model C Kai 3 H • Model D Kai 2 • Model D Kai 3)

Foreign	12.7cm Single Gun Mount (Ger) • 120mm/50 Twin Gun Mount (Mod.1936 • Kai A.mod.1937) (Ita) • QF 4.7inch Gun Mk.XII Kai (UK) • 130mm B-13 Twin Gun Mount (Sov)

Small HA

10cm Twin HA Gun Mount (+ AAFD) • 12cm Single HA Gun Mount (Model E • Model E Kai) • 12.7cm HA Gun Mount (Single LM • Twin LM • Single Kai 2 • Twin Kai 2) • 12.7cm Twin HA Gun Mount (Model A Kai 3 + AAFD • Model B Kai 4 + AAFD)

Foreign	5inch Single Gun Mount Mk.30 (Mk.30 Kai • Mk.30 Kai + GFCS) (US) • Local Mod. 12.7cm Twin HA Gun Mount (CN) • Local Mod. 10cm Twin HA Gun Mount (CN)

Medium

14 cm	14cm Single Gun Mount • 14cm Twin Gun Mount (Kai • Kai 2)

15-15.5 cm/6 inch	15.2cm Twin Gun Mount (Kai • Kai 2) • 15.5cm Triple Gun Mount (Kai) • 152mm/55 Triple Rapid Fire Gun Mount (Kai) (Ita) • 6inch Triple Rapid Fire Gun Mount Mk.16 (Mk.16 mod.2) (US) • 6inch Mk.XXIII Triple Gun Mount (UK) • Bofors 15.2cm Twin Gun Mount Model 1930 (Swe) • Bofors 15cm Twin Rapid Fire Gun Mount Mk.9 Model 1938 (Mk.9 Kai + Single Mk.10 Kai) (Swe/NL) • 6inch Twin Rapid Fire Gun Mount Mk.XXI (UK/Au)

20-20.3 cm/8 inch	20.3cm Twin Gun Mount (No.2 • No.3 • Proto No.4) • SKC34 20.3cm Twin Gun Mount (Ger) • 203mm/53 Twin Gun Mount (Ita) • 8inch Triple Gun Mount Mk.9 (Mk.9 mod.2) (US)

Medium HA

5inch Twin DP Gun Mount (CD) (+ GFCS) (US)

Large

30.5-32 cm	305mm/46 Gun Mount (Twin • Triple) (Ita) • 320mm/44 Gun Mount (Twin • Triple) (Ita) • 30.5cm Triple Gun Mount (Kai) (Sov)

35.6 cm/14 inch	35.6cm Twin Gun Mount (Dazzle Camo • Kai • Kai 2 • Kai 3/Dazzle Camo • Kai 4) • Prototype 35.6cm Triple Gun Mount • 35.6cm Triple Gun Mount Kai (Dazzle Camouflage) • 14inch/45 Gun Mount (Twin • Triple) (US)

38-38.1 cm	38cm Twin Gun Mount (Kai) (Ger) • 381mm/50 Triple Gun Mount (Kai) (Ita) • 38.1cm Mk.I Twin Gun Mount (Mk.I/N Kai) (UK) • 38cm Quadruple Gun Mount (Kai • Deux) (Fr)

41 cm/16 inch	41cm Twin Gun Mount (Kai 2) • 41cm Triple Gun Mount (Proto • Kai • Kai 2) • 16inch Twin Gun Mount (Mk.I • Mk.V • Mk.VIII Kai) (US) • 16inch Triple Gun Mount (Mk.6 • Mk.6 + GFCS • Mk.6 mod.2 • Mk.7 • Mk.7 + GFCS) (US) • 16inch Triple Gun Mount (Mk.I • Mk.I + AFCT Kai • Mk.I Kai + FCR Type 284) (UK)

46 cm	Prototype 46cm Twin Gun Mount • 46cm Triple Gun Mount (Kai)

Very Large

Prototype 51cm Twin Gun Mount • 51cm Twin Gun Mount • Prototype 51cm Triple Gun Mount

Secondary Guns

Surface

15.2cm Single Gun Mount • 15.5cm Triple Gun Mount (Kai • Kai 2) • 15cm Twin Gun Mount (Ger) • OTO 152mm Triple Rapid Fire Gun Mount (Ita) • 15.2cm Triple Gun Mount (Fr)

High-Angle

8cm HA Gun (+ Add. MG) • 10cm Twin HA Gun Mount (Carriage) (Kai + Add. MG) • 12.7cm Twin HA Gun Mount (+ AAFD) • 10cm Twin HA Gun Mount Battery CD • 12cm Single HA Gun Mount + 25mm MG

Foreign	10.5cm Twin Gun Mount (Ger) • 65mm/64 Single Rapid Fire Gun Mount Kai (Ita) • 90mm Single HA Gun Mount (Ita) • 5inch Single HA Gun Mount Battery (US) • 5inch Twin Gun Mount Mk.28 mod.2 (US)

Large Secondary (HA)

5inch Twin Gun Mount (Secondary Armament) CD (US)

Anti-Air

AA Guns/Rocket Launchers	7.7mm Machinegun • 12.7mm Machinegun • 25mm Autocannon Mount (Single • Twin • Triple • Triple CD) • 25mm Anti-aircraft Autocannon Mount & Machine Guns • Bi Type 40mm Twin Autocannon Mount (UK) • 12cm 30-tube Rocket Launcher (Kai 2) • 2cm Flakvierling 38 (Ger) • 3.7cm FlaK M42 (Ger) • Bofors 40mm Quadruple Autocannon Mount (Swe/US) • QF 2-pounder Octuple Pom-pom Gun Mount (UK) • 20-tube 7inch UP Rocket Launchers (UK)

Anti-Aircraft Fire Directors	Type 91 AAFD • Type 94 AAFD

Torpedo Weapons

Surface	53cm Twin Torpedo Mount • 53cm Bow O2 Torpedoes • 61cm Torpedo Mount (Triple • Triple O2 • Triple O2 LM • Quad • Quad O2 • Quad O2 LM • Quintuple O2 • Proto Sext O2) • 533mm Quint Torpedo Mount (Initial Model • Late Model) (US) • 533mm Triple Torpedo Mount (Model 53-39) (Sov)

Submarine	Late Model Bow Torpedo Mount (4 tubes) (+ Skilled Sonar Personnel) • Late Model Bow Torpedo Mount (6 tubes) (+ Skilled Sonar Personnel) • Submarine 53cm Bow Torpedo Mount (8 tubes) (Late Model) • Prototype FaT Type 95 Oxygen Torpedo Kai (IJN/Ger) • 21inch 4-tube Bow Torpedo Launcher (Initial Model • Late Model) (US) • 21inch 6-tube Bow Torpedo Launcher (Initial Model • Late Model) (US) • Submarine 4-tube Stern Torpedo Launcher (Initial Model • Late Model) (US)

Midget Submarines	Kouhyouteki (Type A • Type C • Type D Kai)

Carrier-Based Planes

Fighters

Zero	Model 21 (Skilled) • Model 32 (Skilled) • Model 52 (Skilled) • Model 64 • Model 52C (601) • Model 21 (Iwamoto) • Model 52A (Iwamoto) • Model 53 (Iwamoto) • Model 52C (Iwai) • Model 52C (Hachiman)

Other (IJN)	Type 96 (Kai) • Shiden (Kai 2 • Kai 4) • Reppuu (Prototype LM • Model 11 • 601 • Kai • Kai 2 • Kai 2 (CD1/Skilled)) • Prototype Jinpuu • Shinden Kai

Foreign	Bf 109 T Kai (IJN/Ger) • Fw190 (T Kai • A-5 Kai (Skilled)) (IJN/Ger) • Reggiane (2001 OR Kai • 2005 Kai) (IJN/Ita) • Wildcat (F4F-3 • F4F-4) (US) • Hellcat (F6F-3 • F6F-5) (US) • XF5U (US) • FR-1 Fireball (US) • Fulmar (UK) • Seafire Mk.III Kai (UK) • Corsair Mk.II (Ace) (UK/US)

Night	Reppuu Kai 2 Model E (CD1/Skilled) • Hellcat (F6F-3N • F6F-5N) (US) • F4U-2 Night Corsair (US)

Dive Bombers

Type 99 (Skilled • Model 22 • Model 22/Skilled • Egusa) • Suisei (601 • Model 12A (w/ Cluster Bombs • w/ Photo Fuze Bombs) • Model 22 (634 • 634/Skilled) • Egusa) • Prototype Nanzan

Foreign	Ju.87C (Kai • Kai 2 KMX • Kai 2 KMX/Skilled) (IJN/Ger) • Re.2001 CB Kai (IJN/Ita) • Dauntless (SBD • SBD-5) (US) • Helldiver (SB2C-3 • SB2C-5) (US) • Corsair (F4U-1D (US) • F4U-4 (US) • AU-1 (US) • F4U-7 (Fr/US)) • FM-2 (US) • Skua (UK)

Fighter-bombers	Type 0 (Model 62 FB (Iwai) • Model 63 FB • Model 64 KMX • Model 64 (Skilled FB))

Torpedo Bombers

Type 97 (Skilled • 931 • 931/Skilled • Tomonaga • Murata) • Tenzan (601 • 931 • Model 12A • Tomonaga • Murata) • Ryuusei (Kai • Kai Skilled • 601 • CD1 • CD1/Skilled)

Foreign	Re.2001 G Kai (IJN/Ita) • TBD (US) • TBF (US) • Swordfish (Mk.II Skilled • Mk.III Skilled) (UK) • Barracuda (Mk.II • Mk.III) (UK) • Mosquito TR Mk.33 (UK)

Night	Type 97 Model E (Skilled) • Tenzan Model 12A Kai (Skilled) • TBM-3D (US) • TBM-3W+3S (JMSDF/US)

Jets

Jet Keiun Kai • Kikka Kai

Recons

Saiun (4th Recon • East Caroline) • Type 2 • Fulmar (Reconnaissance Fighter/Skilled) (UK)

Large	Prototype Keiun

Land-Based Planes

Bombers

Attackers	Type 96 • Type 1 (Model 22A • Model 34 • Nonaka • Hachiman) • Ginga (Skilled • Egusa) • Type 1 Hayabusa Model III Kai (65) (IJA) • Type 4 Heavy Bomber Hiryuu (Skilled • + No.1 Model 1A Guided Missile • Skilled + No.1 Model 1A Guided Missile) (IJA) • Do 17 Z-2 (Ger) • Do 217 (E-5 + Hs293 • K-2 + Fritz-X) (Ger) • SM.79 (bis • Skilled) (Ita) • B-25 (US) • Mosquito FB Mk.VI (UK)

Anti-Submarine	Toukai (Proto • 901)

Assault	Ki-102 B (+ No.1 Model 1B Guided Missile) (IJA)

Heavy	Shinzan (Kai)

Interceptors

"Army"	Type 1 Fighter Hayabusa (Model II • Model II (64) • Model IIIA • Model IIIA (54)) (IJA) • Type 3 Fighter Hien (Model 1D • 244) (IJA) • Type 4 Fighter Hayate (IJA) • Type 2 Two-seat Fighter Toryuu (Model C) (IJA) • Ki-96 (IJA) • Fw 190 D-9 (Ger) • Spitfire (Mk.I • Mk.V • Mk.IX Skilled) (UK)

"Navy"	Raiden • Shiden (Model 11 • Kai • Kai 343/301 • Kai 343/407 • Kai 343/701) • Type 0 Fighter (Model 22 (251) • Model 21 (Tainan) • Model 32 (Tainan)) • Reppuu Kai (352/Skilled)

Jets	Me 262 A-1a/R1 (Ger)

HA	Me 163B (Ger) • Shuusui (Proto)

Recons

Type 2 Recon (Skilled) • Mosquito PR Mk.IV (UK)

Seaplanes

Recons

Type 0 Reconnaissance Seaplane (Model 11B • Model 11B Skilled) • Type 0 Observation Seaplane • Type 0 Small Reconnaissance Seaplane (Skilled) • Shiun (Skilled) • Ar196 Kai (IJN/Ger) • Ro.43 Reconnaissance Seaplane (Ita) • SOC Seagull (US) • OS2U (US) • SO3C Seamew Kai (US) • Swordfish Mk.II Kai (UK) • Fairey Seafox Kai (UK/Swe) • S9 Osprey (UK/Swe)

Night	Type 98 Reconnaissance Seaplane (Night Recon) • Type 0 Reconnaissance Seaplane Model 11B Kai (Night Recon) • Loire 130M (Fr) • Walrus (UK) • Sea Otter (UK)

Bombers

Zuiun (631 • 634 • 634/Skilled • Model 12 • Model 12 (634) • Kai 2 (634) • Kai 2 (634/Skilled)) • Seiran (Prototype • 631) • Swordfish (Mk.III Kai • Mk.III Kai Skilled) (UK/Swe) • Laté 298B (Fr)

Night	Prototype Night Zuiun (Attack Equipment)

Fighters

Type 2 Kai (Skilled) • Kyoufuu (Kai • Kai 2) • Ro.44 Seaplane Fighter (bis) (Ita)

Large Flying Boats

Type 2 Large Flying Boat • PBY-5A Catalina (US)

Radars

Small	Type 13 Air Radar (Kai • Kai LM) • Type 22 Surface Radar (Kai 4 • Kai 4 Calibrated LM • Kai 4 LM + Passive Radiolocator (E27)) • Type 33 Surface Radar • Radar Equipment Mast (Type 13 Kai + Type 22 Radar Kai 4) • SG Radar (Initial Model • Late Model) (US) • GFCS Mk.37 (US)

Large	Type 21 Air Radar (Kai • Kai 2) • Type 32 Surface Radar (Kai) • Type 42 Air Radar (Kai 2) • FuMO25 Radar (Ger) • SK Radar (+ SG) (US) • Type 281 Radar (UK) • Type 274 Fire Control Radar (UK)

Very Large	15m Duplex Rangefinder + Type 21 Radar Kai 2 ( + Skilled Fire Direction Center)

Submarine	Submarine Radar & Waterproof Telescope • Submarine Radar & Passive Radiolocator (E27) • Late Model Submarine Radar & Passive Radiolocator • Late Model Radar & Passive Radiolocator + Snorkel Equipment • SJ Radar + Submarine Conning Tower Equipment

Anti-Submarine Warfare

Sonars

Small	Type 93 Passive Sonar • Type 3 Active Sonar (Kai) • Type 4 Passive Sonar • ASDIC (Type 124 • Type 144/147 • Type 144/147 + HF/DF) (UK)

Large	Type 0 Passive Sonar

Depth Charges

Projectors‎	Type 94 Depth Charge Projector • Type 3 Depth Charge Projector (CD) • Prototype 15cm 9-tube ASW Rocket Launcher • RUR-4A Weapon Alpha Kai (US) • Mk.32 ASW Torpedo (Mk.2 Thrower) (US)

Racks	Type 95 Depth Charge • Type 2 Depth Charge (Kai 2) • Hedgehog (Initial Model) (UK) • Lightweight ASW Torpedo (Initial Test Model) (US)

Others	Type 2 12cm Mortar Kai (CD)

Rotorcraft

Ka Type Observation Autogyro (IJA) • O Type Observation Autogyro (Kai • Kai 2) (IJA) • S-51J (Kai) (JMSDF/US)

Liaison Aircraft

Type 3 Command Liaison Aircraft (ASW) (Kai) (IJA) • Type 1 Fighter Hayabusa (Model II Kai (20th Squadron) • Model III Kai (Skilled/20th Squadron)) (IJA)

Miscellaneous

Anti-Ground Rockets

WG42 (Wurfgerät 42) (Ger) • Type 4 20cm Anti-ground Rocket Launcher (CD)

Shells

Armor-Piercing	Type 91 AP Shell • Type 1 AP Shell (Kai)

Anti-Air	Type 3 Shell (Kai • Kai 2)

Engines

Improved Kanhon Type Turbine • Enhanced Kanhon Type Boiler • New Model High Temperature High Pressure Boiler

Landing Craft

Daihatsu Landing Craft (+ Type 89 & Landing Force • + Panzer II (IJN/Ger) • Armed) • Toku Daihatsu Landing Craft (+ 11th Tank Regiment • + Type 1 Gun Tank • + Panzer III (IJN/Ger) • + Panzer III Ausf.J (IJN/Ger) • + Chi-Ha • + Chi-Ha Kai ) • M4A1 DD (US) • Soukoutei (AB-Class) (IJA)

Amphibious Vehicles

Special Type 2 Amphibious Tank • Special Type 4 Amphibious Tank (Kai)

Landing Forces

Army Infantry Corps (+ Chi-Ha Kai) • Type 97 Medium Tank (Chi-Ha) (Kai)

Extra Armor

Medium	Anti-torpedo Bulge (Medium) • New Kanhon Design Anti-torpedo Bulge (Medium) • Arctic camouflage (+ Arctic equipment)

Large	Anti-torpedo Bulge (Large) • New Kanhon Design Anti-torpedo Bulge (Large) • Pugliese Underwater Protection Bulkhead (Ita)

Night Battle Aid

Searchlight • Type 96 150cm Searchlight • Star Shell

Facility & Crew

Ship Repair Facility

Skilled Lookouts	Skilled Lookouts (Torpedo Squadron)

Command Facilities	Fleet Command Facility (Striking Force • Elite Torpedo Squadron)

Aviation Personnels	Skilled Carrier-based Aircraft Maintenance Personnel • Night Operation Aviation Personnel (+ Skilled Deckhands) • Arctic Gear & Deck Personnel • Skilled Deck Personnel (+ Aviation Maintenance Hands)

Surface Ship Equipment

Barrage Balloon

Smoke Generators	Smoke Generator (Smoke Screen) (Kai)

Consumables

Underway Replenishment

Repair Personnels	Emergency Repair Personnel • Emergency Repair Goddess

Rations	Combat Ration (Special Onigiri) • Canned Saury

Others

Drum Canister (Transport Use) • Saiun (Disassembled for Transport)

Unreleased & removed

SB2U

HA - High-Angle or High-Altitude; DP - Dual-Purpose; LM - Late Model; CD - Concentrated Deployment or Carrier Division

Contents

Introduction

Notes

How To Obtain

Akashi's Improvement Arsenal

See Also

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