Omaha

0.6.9.1.1

Omaha

Cruiser | U.S.A. | Tier V

Tech Tree Position

stock

 top

General

Research price10500 exp

Purchase price1 500 000

Hit Points23 100

Aircraft

Main Battery

152 mm/53 Mk138 х 1 / 2 х 2 pcs.

Rate of Fire7.5 shots/min.

Reload Time8 sec.

Rotation Speed8 deg./sec.

180 Degree Turn Time22.5 sec.

Firing Range13.83 km.

Maximum Dispersion137 m.

HE Shell152 mm HE/HC Mk34 mod. 1

Maximum HE Shell Damage2200

Chance of Fire on Target Caused by HE Shell12 %

Initial HE Shell Velocity914 m./s.

HE Shell Weight47.7 kg.

AP Shell152 mm AP/SC Mk27 mod. 5

Maximum AP Shell Damage3100

Initial AP Shell Velocity914 m./s.

AP Shell Weight47.6 kg.

Torpedo Tubes

533 mm Twin4 х 2 pcs.

Rate of Fire1.36 shots/min.

Reload Time44 sec.

Rotation Speed25 deg./sec.

180 Degree Turn Time7.2 sec.

TorpedoMk11

Maximum Damage11 733

Torpedo Speed56 knot

Torpedo Range5.49 km.

AA Defense

76.2 mm/50 Mk22 mod. 24 х 1 pcs.

. . . Average Damage per Second11.2

. . . Firing Range3.51 km.

Maneuverability

Maximum Speed34 knot

Turning Circle Radius600 m.

Rudder Shift Time7.5 sec.

Concealment

Surface Detectability Range13.5 km.

Air Detectability Range6.69 km.

Battle Levels

12345678910

0.6.9.1.1

Omaha

Cruiser | U.S.A. | Tier V

Tech Tree Position

stock

 top

General

Research price10500 exp

Purchase price1 500 000

Hit Points26 800

Aircraft

Main Battery

152 mm/53 Mk162 х 2 / 6 х 1 pcs.

Rate of Fire8.57 shots/min.

Reload Time7 sec.

Rotation Speed7.5 deg./sec.

180 Degree Turn Time24 sec.

Firing Range15.21 km.

Maximum Dispersion137 m.

HE Shell152 mm HE/HC Mk34 mod. 1

Maximum HE Shell Damage2200

Chance of Fire on Target Caused by HE Shell12 %

Initial HE Shell Velocity914 m./s.

HE Shell Weight47.7 kg.

AP Shell152 mm AP/SC Mk27 mod. 5

Maximum AP Shell Damage3100

Initial AP Shell Velocity914 m./s.

AP Shell Weight47.6 kg.

Torpedo Tubes

533 mm Triple2 х 3 pcs.

Rate of Fire1.36 shots/min.

Reload Time44 sec.

Rotation Speed25 deg./sec.

180 Degree Turn Time7.2 sec.

TorpedoMk11

Maximum Damage11 733

Torpedo Speed56 knot

Torpedo Range5.49 km.

AA Defense

76.2 mm/50 Mk22 mod. 28 х 1 pcs.

. . . Average Damage per Second22.4

. . . Firing Range3.51 km.

20 mm Oerlikon Mk410 х 1 pcs.

. . . Average Damage per Second36

. . . Firing Range2.01 km.

40 mm Bofors Mk13 х 2 pcs.

. . . Average Damage per Second33.9

. . . Firing Range3.51 km.

Maneuverability

Maximum Speed34 knot

Turning Circle Radius600 m.

Rudder Shift Time5.7 sec.

Concealment

Surface Detectability Range13.5 km.

Air Detectability Range6.69 km.

Battle Levels

12345678910

V

1 500 000

Omaha — American Tier V cruiser.

El diseño anterior del crucero de exploración tenía un armamento pobre, así que se sometió a revisión. Se colocaron dos monturas de cañones gemelos en el barco: una en la proa y una en la popa. Para reducir su peso, se eliminaron los cañones sencillos situados en el centro del barco y también se desechó la catapulta. La Marina de EE. UU. adoptó por primera vez la práctica de colocar el motor y las salas de calderas en gradas. Durante la Segunda Guerra Mundial, este crucero sirvió en el océano Atlántico, realizando tareas de patrullaje y escoltando barcos aliados. Después, participó en operaciones de desembarco anfibias en el sur de Francia.

Modules

	Rate of Fire (shots/min)	180 Degree Turn Time (sec)	Maximum Dispersion (m)	Maximum HE Shell Damage (HP)	Chance of Fire on Target Caused by HE Shell (%)	Maximum AP Shell Damage (HP)		Research price (exp)	Purchase price ()
152 mm/53 Mk.12 en una montura Mk.16/montura Mk.13/montura de casamata Mk.13	7,5	22,5	137	2200	12	3100		0	110 000
152 mm/53 Mk.12 en una montura Mk.16/montura Mk.13/montura de casamata Mk.13	8,6	24	137	2200	12	3100		2700	280 000

	Hit Points (HP)	Armor (mm)	Armor (mm)	Main Turrets (pcs.)	Secondary Gun Turrets (pcs.)	AA Mounts (pcs.)	Torpedo Tubes (pcs.)	Hangar Capacity (pcs.)		Research price (exp)	Purchase price ()
Omaha (A)	23 100	10	76	8/2		4/8	4			0	145 000
Omaha (B)	26 800	10	76	8/2		10/2/6	4			4700	400 000

	Rate of Fire (shots/min)	Torpedo Tubes Reload Time (sec)	180 Degree Turn Time (sec)	Maximum Damage (HP)	Torpedo Speed (knot)	Torpedo Range (km)		Research price (exp)	Purchase price ()
Mark 11	0,9	66	7,2	11 733	56	5,5		0	56 000

	Firing Range Increase (%)	Maximum Firing Range (km)		Research price (exp)	Purchase price ()
Mk5 mod. 1		0		0	90 000
Mk5 mod. 2		0		2300	210 000

	Maximum Speed (knot)		Research price (exp)	Purchase price ()
Propulsión: 90 000 CV	34		0	84 000

Compatible Upgrades

Slot 1
Slot 2
Slot 3

Player Opinion

Performance

Tier V's Omaha lands squarely in the middle of the USN cruiser line, and is a well-rounded ship with solid torpedoes, good guns, and average AA for her tier. She has a main battery range of 14.8 km when fully upgraded, mounts more guns than Phoenix, and they're placed better to boot; Omaha is capable of an eight gun broadside — seven with Hull (C) — as well as being able to bring six guns to bear directly forward. The arrangement of the main battery is excellent for chasing targets while presenting a smaller silhouette.

Omaha is the last torpedo-armed cruiser in the American line, and her fish leave much to be desired. While there are two launchers on each side that start off as twin-tube, they become triple-tube with Hull (B), and one launcher on each side is lost with Hull (C). The torpedoes on all hulls have a paltry 5.5 km range, and should be used only when the guns can't do enough damage per minute or Omaha finds herself very close to another ship. The good news is that Omaha’s torpedoes hit pretty hard; if a torpedo salvo hits, it will do massive amounts of damage. They become very useful when ambushing in close quarters.

Befitting her status as a light cruiser, the armor fitted on Omaha is fairly weak. Omaha relies mainly on speed to avoid damage from other ships, and dodging shells and torpedoes is key to surviving. Her quick rudder shift provides captains the ability to make her a difficult target to hit, and they must maximize use of her rudder to avoid being blown away by enemy battleships.

As a teammate, Omaha is the perfect escort for battleships. She provides decent AA cover, extra firepower and Hydroacoustic Search to see where torpedoes are coming from far in advance.

Pros:

• High damage per minute, even without firing with a broadside.
• Speed that matches destroyers of that tier and above.
• Good AA for its tier.
• Excellent support ship for battleships.
• Can aim six guns forward; very good when pursuing enemy targets.

Cons:

• As a light cruiser, she has only slightly more armor than a destroyer and can sustain citadel hits even from American and Russian destroyer armor-piercing shells.
• Torpedoes are rather slow at 56 knots, having a range of only 5.5 km and half of the torpedo tubes are lost with the (C) hull.
• Inferior to sister-ship Murmansk in almost every respect.

Research

Early experience gains are best invested in Hull (B) — providing significant upgrade to Omaha’s firepower — followed quickly by the improved 152mm guns. Boost her firing range next by picking up the Fire Control System upgrade, then unlock Hull (C). Investing the credits to equip Hull (C) is captain's choice; it sacrifices two of her torpedo launchers for additional anti-aircraft defenses and is a downgrade to her overall firepower. For the purposes of unlocking Cleveland, sticking with Hull (B) is probably best.

Optimal Configuration

Upgrades

Omaha has one more upgrade slot than Phoenix, gaining access to Upgrade Slot 2 at Tier V. Captains who are interested in embracing a cruiser's role as an anti-aircraft platform should equip AA Guns Modification 2 in this slot; everyone else should install Aiming Systems Modification 1. Upgrade Slot 1 is best filled with either Magazine Modification 1 or Main Armaments Modification 1. Damage Control System Modification 1 or Propulsion Modification 1 are the recommended choices for Upgrade Slot 4.

Commander Skills

Recommended Commander Skills
Cost (points)	Endurance		Attack		Support		Versatility
1	Priority Target Situational Awareness indicator will show the number of opponents currently aiming at you with main battery guns. ★★★	Preventative Maintenance -30% to the risk of incapacitation of modules. ★★★	Expert Loader -50% to reload time when shell type is switched. ★	Aircraft Servicing Expert +5% to HP of carrier-based aircraft. -10% to servicing time of carrier-based aircraft.	Direction Center for Catapult Aircraft +1 catapult aircraft. -20% to the speed of catapult aircraft. ★★	Dogfighting Expert +10% to average damage per second of fighter for each tier of difference between them. +10% to fighters ammunition.	Incoming Fire Alert Indicator of long-range enemy artillery fire. ★★	Evasive Maneuver -20% to detectability of strike aircraft when returning to the carrier. +75% to HP of strike aircraft when returning to the carrier. -30% to airspeed of strike aircraft when returning to the carrier.
2	High Alert -10% to reload time of Damage Control Party consumable. ★★	Jack of All Trades -5% to reload time of all consumables. ★★	Expert Marksman +2.5 deg/sec to traverse speed of guns with a caliber up to 139mm. +0.7 deg/sec to traverse speed of guns with a caliber above 139mm. ★★	Torpedo Acceleration +5 knots to torpedo speed. -20% to torpedo range.	Smoke Screen Expert +20% to the radius of the smoke screen.	Expert Rear Gunner +10% to average damage per second of self-defense armament for aircraft with rear gunners.	Adrenaline Rush -0.2% to reload times of all types of armament for each 1% of total health lost. ★★	Last Stand The ship remains able to move and maneuver while the engine or steering gears are incapacitated. ★★
3	Basics of Survivability -15% to time of repair, fire extinguishing, and recovery from flooding. ★	Survivability Expert +350 HP for each ship tier. ★	Torpedo Armament Expertise -10% to reload time of torpedo tubes. -20% to servicing time of torpedo bombers. ★★	Emergency Takeoff Makes it possible to launch and recover aircraft while the ship is on fire. +100% to aircraft servicing time while aircraft carrier is on fire.	Basic Firing Training -10% to reload time of main battery guns with a caliber up to and including 139mm and all secondary battery guns. +20% to average damage per second of AA defense. ★★	Superintendent +1 additional charge to all consumables mounted on a ship. ★★	Demolition Expert +2% to chance of fire on a target caused by a main caliber shell, secondary shell, or bomb. ★★★	Vigilance +25% to detection range of enemy torpedoes. ★★
4	Manual Fire Control for Secondary Armament -15% to the maximum dispersion of shells for the secondary armament of Tier I-VI ships. -60% to the maximum dispersion of shells for the secondary armament of Tier VII-X ships.	Fire Prevention -7% to the risk of fire. The maximum number of fires on a ship is reduced to three. ★	Inertia Fuse for HE Shells +30% to the armor penetration capacity of HE shells. -3% to chance of fire on target caused by HE shells. ★★★	Air Supremacy +1 fighter per squadron. +1 bomber per squadron.	Advanced Firing Training +20% to firing range of main battery guns with a caliber up to 139mm and all secondary battery guns. +20% to AA defense firing range. ★★	Manual Fire Control for AA Armament +100% to average damage per second of AA guns with a caliber exceeding 85mm against a designated target.	Radio Position Finding Shows the direction to the nearest enemy ship (that isn't an aircraft carrier). The enemy player is alerted that a bearing has been taken on their ship. ★★	Concealment Expert -10% to the detection radius of destroyers. -12% to the detection radius of cruisers. -14% to the detection radius of battleships. -16% to the detection radius of aircraft carriers. ★★★
Key: ★★★ - Extremely Useful       ★★ - Frequently Useful       ★ - Occasionally Useful      No stars - Not Useful

Consumables

Omaha can equip both Hydroacoustic Search and a Catapult Fighter in addition to the standard Damage Control Party. Damage Control Party II is recommended for Omaha given her status as a light cruiser; modules will inevitably become disabled should she come under sustained enemy fire.

Camouflage

Type 1, 2, or 5 camouflage can be equipped for credits; Types 2 or 5 are recommended at a minimum to reduce the accuracy of incoming shells.

Signals

Recommended Signal Flags
Combat
November Echo Setteseven +10% average damage per second of all anti-aircraft mounts. +10% average damage per second of self-defense armament for aircraft with rear gunners. ★	Mike Yankee Soxisix +5% to secondary battery maximum firing range. -5% to maximum dispersion of secondary battery shells. -5% to secondary battery loading time.	India X-Ray +1% chance of causing a fire for bombs and shells with a caliber above 160mm. +0.5% chance of causing a fire for bombs and shells with a caliber below 160mm. +5% to the risk of your ship's magazine detonating. ★★★	Juliet Whiskey Unaone +15% chance of causing flooding. +5% to the risk of your ship's magazine detonating.	Victor Lima +1% chance of causing a fire for bombs and shells with a caliber above 160mm. +0.5% chance of causing a fire for bombs and shells with a caliber below 160mm. +4% chance of flooding (against your ship). ★★★	Hotel Yankee -20% to damage received when ramming the enemy. +50% to damage dealt when ramming the enemy.
November Foxtrot -5% reload time on all consumables. ★	Sierra Mike +5% to the ship's maximum speed. ★	India Delta +20% to the amount of HP recovered when the Repair Party consumable is used.	Juliet Yankee Bissotwo -20% to flooding duration.	India Yankee -20% to fire duration.	Juliet Charlie -100% to the risk of your ship's magazine detonating. ★★
Economic
Zulu +20% credits earned for the battle.	India Bravo Terrathree -10% to the cost of the ship's post-battle repair.	Equal Speed Charlie London +50% XP earned for the battle. ★★★	Zulu Hotel +50% Commander XP earned for the battle. ★★	Papa Papa +300% Free XP earned for the battle.
Special
Wyvern +50% credits earned for the battle.	Red Dragon +100% XP earned for the battle. +100% Commander XP earned for the battle. ★★	Dragon Flag +333% Commander XP earned for the battle.	Ouroboros +777% Free XP earned for the battle.	Hydra +50% XP earned for the battle. +150% Commander XP earned for the battle. +250% Free XP earned for the battle. ★★
Key: ★★★ - Extremely Useful       ★★ - Frequently Useful       ★ - Occasionally Useful      No stars - Not Useful

Gallery

Historical Info

Construction

Todd Dry Dock, Los Angeles, United States

Laid down: 6 December 1918

Launched: 14 December 1920

Commissioned: 24 February 1923

Specifications

7,050 tons displacement, standard

169.3m length

16.85m beam

4.11m draft

Machinery

12 boilers, 4 turbines

Performance

34 knots at 90,000 shaft horsepower

8,460nm at 10 knots

Armor

Main belt: 76.2mm

Decks: 38.1mm

Bulkheads: 38.1mm forward, 76.2mm aft

Armament

Main

Twelve (2x2, 8x1) 152mm guns

Anti-aircraft

Two (2x1) 76.2mm guns

Torpedoes

Six (2x3) 533mm torpedo tubes

History

Design

The Omaha-class cruisers were a class of light cruisers built for the United States Navy. The oldest class of cruiser still in service with the Navy at the outbreak of World War II, the Omaha class was an immediate post-World War I design.

Maneuvers conducted in January 1915 made it clear that the US Atlantic Fleet lacked the fast cruisers necessary to provide information on the enemy's position and to deny the enemy information of the fleet's own position and to screen friendly forces. Built to scout for a fleet of battleships, the Omaha class featured high speed (35 knots) for cooperation with destroyers, and 6-inch (152 mm) guns to fend off any destroyers the enemy might send against them. Displacing 7,050 tons, they were just over 555 feet long.

The Omaha class was designed specifically in response to the British Centaur subclass of the C-class cruiser. Although from a modern viewpoint, a conflict between the US and Great Britain seems implausible, US Navy planners during this time and up to the mid-1930s considered Britain to be a formidable rival for power in the Atlantic, and the possibility of armed conflict between the two countries plausible enough to merit appropriate planning measures.

The Omaha class mounted four smokestacks, a look remarkably similar to the Clemson-class destroyers (a camouflage scheme was devised to enhance the resemblance). Their armament showed the slow change from casemate-mounted weapons to turret-mounted guns. They held a full twelve 6-inch/53 caliber guns, of which four were mounted in two twin turrets, one fore and one aft, and the remaining eight in casemates; four on each side. Launched in 1920, Omaha (designated C-4 and later CL-4) had a displacement of just over 7,100 long tons. The cruisers emerged with a distinctly old-fashioned appearance owing to their World War I-type stacked twin casemate-mount cannons and were among the last broadside cruisers designed anywhere.

As a result of the design changes placed on the ship mid-construction, the Omaha that entered the water in 1920 was a badly overloaded design that, even at the beginning, had been rather tight. The ships were insufficiently insulated, too hot in the tropics and too cold in the north. Sacrifices in weight savings in the name of increased speed led to severe compromise in the habitability of the ship. While described as a good ship in a seaway, the low freeboard led to frequent water ingestion over the bow and in the torpedo compartments and lower aft casements. The lightly built hulls leaked, so that sustained high-speed steaming contaminated the oil tanks with sea water.

These drawbacks notwithstanding, the US Navy took some pride in the Omaha class. They featured improved compartmentalization; propulsion machinery was laid out on the unit system, with alternating groups of boiler rooms and engine rooms, to prevent immobilization by a single torpedo hit. Magazines were the first to be placed on centerline, below the waterline. A serious flaw in these ships' subdivision was the complete lack of watertight bulkheads anywhere above the main deck or aft on the main deck.

Originally designed to serve as a scout, they served throughout the interwar period as leaders of fleet flotillas, helping them resist enemy destroyer attack. Tactical scouting became the province of cruiser aircraft, and the distant scouting role was taken over by the new heavy cruisers spawned by the Washington Naval Treaty. Thus, the Omaha class never performed their designed function. They were relegated to the fleet-screening role, where their high speed and great volume of fire were most appreciated.

Due to the large topweight lasting on these ships, compounded by the high-mounted catapults, the Navy removed the two lower aft firing casemate-mounted 6-inch guns in 1939, fairing over the casemates port and starboard.

Service

These were the oldest class of cruisers still in service with the Navy in 1941. All were modified during the war with additional 20mm and 40mm anti aircraft guns and radar.

Both USS Detroit and USS Raleigh were at Pearl Harbor during the attack, with Raleigh being torpedoed. Detroit and USS Phoenix were the only large ships to get out of the harbor during the attack.

The ships of the Omaha class spent most of the war deployed to secondary theaters and in less vital tasks than those assigned to more recently built cruisers. The Omaha class were sent in places where their significant armament might be useful if called upon, but where their age and limited abilities were less likely to be tested. These secondary destinations included patrols off the East and West coasts of South America, convoy escort in the South Pacific far from the front lines of battle, patrols and shore bombardment along the distant and frigid Aleutians and Kuril Islands chains, and bombardment duty in the invasion of Southern France when naval resistance was expected to be minimal. The most significant action than any of the ships of the class saw during the war was Marblehead’s participation in early war actions around the Dutch East Indies (most notably, the Battle of Makassar Strait), and Richmond’s engagement in the Battle of the Komandorski Islands.

None of the ships were wartime losses. Raleigh‍’​s torpedo damage at Pearl Harbor and Marblehead‍’​s damage at Makassar Straight were the only significant wartime combat damage suffered by the class.

The ships of the class were considered obsolete as the war ended, and were decommissioned and scrapped within seven months of the surrender of Japan (with the exception of Milwaukee, which had been loaned to the Soviet Navy, and was scrapped when returned to US Navy control in 1949).

Historical Inaccuracies

• Omaha’s Measure 33, Design 2F camouflage scheme is missing.

Historical Gallery

• 

  USS Milwaukee (CL-5), an Omaha-class cruiser.

• 

  1942 ship recognition chart for the Omaha class.

Ships of U.S.A.

Cruisers