Duncan

12.11

Battleship | U.K. | Tier IX

Tech Tree Position

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12.11

Battleship | U.K. | Tier IX

Tech Tree Position

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Battle Levels

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IX

15,000,000

Duncan — British Tier IX battleship.

The further development of the 1920 battlecruiser became project G3. It differed from its predecessor by having a smaller main gun caliber of 419 mm, shorter length, and smaller displacement. In early 1921, the project was redesigned to enhance the armor at the expense of its speed and main caliber characteristics. In October of the same year, the construction of four ships under this project was ordered, but it was suspended amid the start of the Washington Naval Conference. Following its results, the construction order was canceled.

Modules

	Rate of Fire (shots/min)	180° 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 ()
419 mm/45 Mk.I on a Mk.I mount	1.9	30	213	6,150	47	13,050		0	1,500,000

	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 ()
Duncan (A)	66,900	10	419	3	8/6	10/10/4/8	2			0	2,250,000
Duncan (B)	75,200	10	419	3	8/6	18/10/4/8	2			60,000	5,100,000

	Rate of Fire (shots/min)	Torpedo Tubes Reload Time (sec)	180° Turn Time (sec)	Maximum Damage (HP)	Torpedo Speed (knot)	Torpedo Range (km)		Research price (exp)	Purchase price ()
622 mm Mk I	1.1	55	15	29,366	67	10		0	1,500,000

	IDS_SHIP_PARAM_SUO_INCREASE_DIST (%)	Maximum Firing Range (km)		Research price (exp)	Purchase price ()
Mk IX mod. 1		0		0	1,500,000
Mk IX mod. 2		0		40,000	3,400,000

	Maximum Speed (knot)		Research price (exp)	Purchase price ()
Propulsion: 160,000 hp	32		0	1,500,000

Compatible Upgrades

Slot 1
Slot 2
Slot 3
Slot 4
Slot 5
Slot 6

Player Opinion

Performance

Warning. The data presented in the AA Defense sidebar section may be incorrect.
For a graphic summary of ships Tiers VIII thru XI see LittleWhiteMouse's "Actual AA DPS".

Duncan is the Tier IX ship of the British battlecruiser tech tree. She further continues the emphasis on speed and firepower, with improvements to survivability in the form of the Specialized Repair Teams  consumable.

Armament:

Duncan carries nine 419 mm guns in three triple turrets. These guns have a range of 19.7 km. Her AP shells have good alpha damage, and can overmatch up to 27 mm of armor, which is present on many cruisers in her matchmaking spread. They also have a shortened fuse time of 0.015 s, which is useful against cruisers as it reduces her chance of overpenetrating their armor. Her HE shells have a 47% fire chance, and 70 mm of penetration.

Duncan’s guns are accurate, with good horizontal and vertical dispersion values. She uses the battlecruiser dispersion formula but with a lower sigma value of 1.6. The guns have an average reload time of 31 seconds, which can be reduced to 27.3 seconds with the Main Battery Modification 3 upgrade.

Her turrets have a fast 180-degree turn time of 30 seconds. Her turret layout is unique, as her third turret is positioned in the middle of her superstructure. This limits her rearward firing angles and reduces her effectiveness when kiting, but gives her comfortable forward firing angles.

Duncan carries two single-launch torpedo launchers on the sides of her hull, one per side. They have a 55-second reload time, 10 km range, and a maximum damage of 29,367. Her torpedo tubes are fixed, but have the torpedo turning mechanic. Immediately after launch, they will perform an S-turn to reach the selected heading, before arming and proceeding in a straight line. This allows them to fire at much wider angles, but the arming time and minimum arming distance are longer as a result. In addition, their “traverse speed” is half as fast as those of “real” launchers, which can cause issues at close range or during drive-bys.

Survivabillity:

Duncan’s hull is thinly armored, with her bow and stern covered with 25 mm plating. This allows every ship with a gun caliber of 380 mm or higher to overmatch it. Her deck armor is thicker at 32 mm, but most cruiser HE shells will still penetrate it. Duncan’s citadel is vulnerable, as it is large and sits high out of the water. Captains must be careful when showing broadside against enemy battleships and large cruisers.

Duncan gets access to the same Specialized Repair Teams consumable found on Nelson and Yukon. It has a short action time of 20 seconds, and heals up to 2% of her HP per second, including 60% of any non-citadel damage taken. As she only heals 10% of citadel damage (including torpedoes that hit her torpedo protection), it is vital to not take citadel damage and avoid torpedoes as much as possible in order to maximize her Repair Party efficiency. Duncan also has one less charge of her heal than normal.

Her minimum surface concealment is very good at 12.1 km. She has an average HP pool of 75,200, but her torpedo damage reduction is low at only 22.9%. With her excellent surface concealment and thin armor, Duncan captains should play her at medium ranges.

Maneuverability:

Duncan is a fast battleship, with a top speed of 32 knots, that can be increased to 36.3 knots with the Engine Boost  consumable and Sierra Mike signal. Her rudder shift time of 16.6 s is average, however her 910 m turning radius is quite poor. Her high speed allows her to quickly and easily reposition when needed.

Duncan’s Engine Boost consumable comes with 3 charges, provides 8% more speed, lasts 120 seconds, and has a 120 second cooldown.

Duncan cannot mount Propulsion Modification 1 , but gets the same enhanced acceleration found on the British destroyer and light cruiser lines. This allows her to accelerate forward very quickly to high speeds, but she takes longer to slow down.

Anti-Aircraft:

Duncan’s AA DPS is relatively poor overall, but she has a high mid-range DPS of 504, which increases to a best-in-tier 756 DPS with the Defensive AA Fire  consumable. She only produces four flak clouds that deal low damage. Her high mid range DPS can shoot down planes but cannot stop strikes entirely. Grouping with allied ships to overlap anti-aircraft auras is recommended in games with carriers

Duncan only has 3 charges of her Defensive AA Fire consumable, so they should be saved for torpedo bombers and AP dive bombers, as these armaments can cause damage she cannot fully heal.

Battle Performance:

Duncan is a mid-range battleship that likes to play on flanks and punish broadside enemies, much like the other tech tree British battlecruisers. Her good speed allows her to reposition for better shots and react to the situation. Her low concealment allows her to play closer to enemies, and provide crossfire on enemy battleships and cruisers. With her accurate guns and 27 mm overmatch, players should mainly fire AP, only using HE on angled targets and destroyers. Her torpedoes are best used for deterring suicide rushes and when fighting targets at closer ranges.

While an improvement over her predecessors, her 25 mm bow and stern are still susceptible to battleship AP overmatch, and she should avoid drawing too much attention to herself. Her poor turning radius, low torpedo damage protection, and vulnerable citadel mean players should not seek close-quarters engagements too early. The addition of her Specialized Repair Teams consumable allows Duncan to take sustained damage and easily deal with fires, but captains should avoid taking citadel or torpedo damage.

Pros:

Accurate guns with battlecruiser dispersion
Shorter AP fuse time
Fast turret traverse
Torpedoes, with the torpedo turning mechanic\
Strong medium-range AA DPS
Fast, with improved acceleration
Excellent concealment
Access to Specialized Repair Teams  consumable
Access to Defensive AA Fire  consumable
Access to Engine Boost  consumable

Cons:

Thin, easily overmatched bow and stern plating
32 mm deck plating
Vulnerable citadel
Low torpedo damage protection
Overall underwhelming AA DPS and low flak count
Large turning radius with an average rudder shift
Limited Defensive AA Fire charges
Fewer charges of her heal

Research

Researchable upgrades for Duncan:

Hull: Upgrade to Hull (B) for improved survivability and maneuverability. Research of this module unlocks progression to St. Vincent.
Gun Fire Control System: Upgrade to Mk IX Mod. 2 for an extra 10% range on the main battery.

Optimal Configuration

Upgrades

The recommended upgrades are:

Slot 1: Main Armaments Modification 1
Slot 2: Damage Control System Modification 1  or Engine Boost Modification 1
Slot 3: Aiming Systems Modification 1
Slot 4: Steering Gears Modification 1
Slot 5: Concealment System Modification 1 
Slot 6: Main Battery Modification 3

Commander Skills

Owing to Duncan's Specialized Repair Teams consumable, Furious is a viable alternative to Fire Prevention Expert to speed up her reload while on fire.

Recommended Commander Skills
Cost (points)	Attack			Defense
1	Gun Feeder -40% time to switch shell type. ★★★	Demolition Expert +1% chance of main and secondary HE shells causing a fire +15% to the fragmentation damage area of HE ordnance when firing at submarines.	Consumables Specialist −7.5% cooldown time of all Consumables except: Damage Control Party , Repair Party . ★	Emergency Repair Specialist -3% cooldown time of Damage Control Party  and Repair Party .	Incoming Fire Alert Receive a warning about a salvo fired at your ship from more than 4.5 km.	Preventive Maintenance −30% chance of main armament, engines, steering becoming incapacitated +15% to HP of secondary and AA guns. ★★
2	Grease the Gears +20% main turret traverse speed. ★★	Inertial Fuse for HE Shells +25% armor penetration of HE shells. Base fire chance reduced by half.	Brisk So long as the ship remains undetected: +10% ship speed. ★★★	Vigilance +25% detection range of enemy torpedoes +7% damage reduction of Torpedo Protection System. .	Priority Target The detection indicator will show the number of enemies targeting you with main battery. ★★	AAA & ASW Expert +15% continuous AAA and flak damage . +10% damage inflicted by depth charges. While AAA is active: −40% ship consumables reload time.. ★
3	Super-Heavy AP Shells +7.5% AP shell damage −10% fire and flood damage received +25% fire and flood duration. ★	Long-Range Secondary Battery Shells +20% secondary battery firing range.	Adrenaline Rush -0.2% reload time of all armaments per 1% HP lost +0.2% AA continuous damage per 1% HP lost. ★★★	Basics of Survivability -15% repair, fire, and flooding duration. ★★	Improved Repair Party Readiness −0.8% reload time of Repair Party each time your ship receives potential damage equal to 100% of the ship's base HP. After receiving 2M HP potential damage: +1 charge of Repair Party .. ★	Focus Fire Training In an active priority AA sector: • +1.5% (to 5%) immediate damage. • +25% continuous damage. • +1 flak burst per salvo. −10% aircraft preparation time. −15% reload time of Airstrike armament..
4	Furious 1st fire / flood −10% Main battery reload time 2nd etc. (up to 5), each −5% Main battery reload time ★★	Manual Secondary Battery Aiming −10% secondary battery reload time. −10% secondary battery dispersion. When firing at a manually selected target: dispersion gradually improves from -25% to -50%.	Close Quarters Combat -10% reload time of main battery if an enemy ship is spotted within secondary range.	Emergency Repair Expert Damage Control Party  and Repair Party : +1 charge (each). +10% action time . ★★★	Concealment Expert -10% detectability range of the ship. ★★★	Fire Prevention Expert -10% risk of fire. Three fires maximum. ★★
Key: ★★★ - Extremely Useful ★★ - Frequently Useful ★ - Occasionally Useful No stars - Not Useful

Consumables

Duncan equips the following consumables:

Slot 1: Damage Control Party 
Slot 2: Specialized Repair Teams  – 3 charges
Slot 3: Engine Boost  – 3 charges
Slot 4: Defensive AA Fire  – 3 charges

Signals

Recommended Signal Flags
Combat
Juliet Charlie -100% to the risk of magazine detonation. ★★	Juliet Yankee Bissotwo -20% to flooding duration. ★★	India Yankee -20% to fire duration. ★★	Hotel Yankee -20% to damage received when ramming the enemy. +50% to damage dealt when ramming the enemy. ★	Victor Lima +1% chance for HE bombs and shells with a caliber above 160mm causing a fire. +0.5% chance for bombs and smaller shells causing a fire. +4% chance of torpedoes causing flooding.	India X-Ray +1% chance for HE bombs and shells with a caliber above 160mm causing a fire. +0.5% chance for bombs and smaller shells causing a fire. +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.	Mike Yankee Soxisix +5% to secondary battery maximum firing range. -5% to maximum dispersion of secondary battery shells. -5% to secondary battery loading time.	November Echo Setteseven +5% continuous AA damage at all ranges. +5% damage from flak bursts. ★★	Sierra Mike +5% to the ship's maximum speed. ★★★	November Foxtrot -5% reload time on all consumables. ★★	India Delta +20% to the amount of HP recovered when Repair Party  is used. ★★★
X-Ray Papa Unaone +10% action time of a Smoke Generator .	Sierra Bravo +10% action time of Hydroacoustic Search  -10% reload time of Defensive AA Fire . ★

Note: Use of the Juliet Charlie signal makes detonation impossible.

Gallery

References

Ships of U.K.

Destroyers	II Medea • III Valkyrie • III Campbeltown • IV Wakeful • V Acasta • VI Icarus • VI Gallant • VII Jervis • VIII Lightning • VIII Cossack • VIII Cossack B • IX Jutland • IX Somme • X Daring • X Druid
Cruisers	I Black Swan • II Weymouth • III Caledon • IV Danae • V Emerald • V Hawkins • V Exeter • VI Leander • VI Devonshire • VI London • VI Dido • VII Fiji • VII Surrey • VII Belfast • VIII Edinburgh • VIII Albemarle • VIII Cheshire • VIII Tiger '59 • VIII Belfast '43 • VIII Hampshire • VIII Nottingham • VIII AL Cheshire • VIII STAR Edinburgh • IX Neptune • IX Drake • X Minotaur • X Goliath • X Plymouth • X Gibraltar • X Monmouth • X Defence • ★ Edgar
Battleships	III Bellerophon • III Indefatigable • III Dreadnought • IV Orion • IV Queen Mary • V Iron Duke • V Tiger • V Agincourt • VI Warspite • VI Queen Elizabeth • VI Renown • VI Repulse • VI Repulse B • VII King George V • VII Rooke • VII Hood • VII Nelson • VII Duke of York • VII Collingwood • VII Renown '44 • VIII Monarch • VIII Hawke • VIII Vanguard • IX Lion • IX Duncan • IX Marlborough • IX Scarlet Thunder • X Conqueror • X St. Vincent • X Thunderer • X Incomparable • ★ Devastation
Aircraft Carriers	IV Hermes • VI Furious • VI Ark Royal • VIII Implacable • VIII Indomitable • VIII Colossus • X Audacious • X Malta • ★ Eagle

Battleships

Japan	II Mikasa • III Kawachi • IV Myōgi • IV Ishizuchi • V Kongō • V ARP Kongō • V ARP Kirishima • V ARP Haruna • V ARP Hiei • V HSF Hiei • VI Fusō • VI Mutsu • VI Ise • VII Nagato • VII Ashitaka • VII Hyūga • VIII Amagi • VIII Yumihari • VIII Kii • VIII Ignis Purgatio • VIII Ragnarok • IX Izumo • IX Adatara • IX Musashi • IX Hizen • IX Iwami • IX Daisen • IX Tsurugi • IX Iwami B • X Yamato • X Bungo • X Shikishima • X ARP Yamato • ★ Satsuma
U.K.	III Bellerophon • III Indefatigable • III Dreadnought • IV Orion • IV Queen Mary • V Iron Duke • V Tiger • V Agincourt • VI Warspite • VI Queen Elizabeth • VI Renown • VI Repulse • VI Repulse B • VII King George V • VII Rooke • VII Hood • VII Nelson • VII Duke of York • VII Collingwood • VII Renown '44 • VIII Monarch • VIII Hawke • VIII Vanguard • IX Lion • IX Duncan • IX Marlborough • IX Scarlet Thunder • X Conqueror • X St. Vincent • X Thunderer • X Incomparable • ★ Devastation
France	III Turenne • IV Courbet • V Bretagne • VI Normandie • VI Dunkerque • VI Dunkerque B • VII Lyon • VII Strasbourg • VIII Richelieu • VIII Gascogne • VIII Champagne • VIII Flandre • VIII Picardie • IX Alsace • IX Jean Bart • IX Jean Bart B • X République • X Bourgogne • ★ Patrie
U.S.S.R.	III Knyaz Suvorov • IV Imperator Nikolai I • IV Gangut • V Pyotr Velikiy • V Oktyabrskaya Revolutsiya • VI Izmail • VI Novorossiysk • VII Sinop • VII Poltava • VIII Vladivostok • VIII Lenin • VIII Borodino • IX Sovetsky Soyuz • IX Navarin • IX AL Sov. Rossiya • X Kremlin • X Slava • ★ Admiral Ushakov
U.S.A.	III South Carolina • IV Wyoming • IV Arkansas Beta • V New York • V Oklahoma • V Texas • VI New Mexico • VI Arizona • VI W. Virginia '41 • VII Colorado • VII Florida • VII West Virginia '44 • VII California • VIII North Carolina • VIII Kansas • VIII Nebraska • VIII Alabama • VIII Massachusetts • VIII Alabama VL • VIII Constellation • VIII Massachusetts B • VIII Alabama ST • VIII North Carolina CLR • IX Iowa • IX Minnesota • IX Delaware • IX Missouri • IX Kearsarge • IX Illinois • IX Kearsarge B • IX Georgia • X Montana • X Vermont • X Louisiana • X Ohio • X Rhode Island • ★ Maine
Germany	III Nassau • III Von der Tann • III König Albert • IV Kaiser • IV Moltke • V König • V Derfflinger • VI Bayern • VI Mackensen • VI Prinz Eitel Friedrich • VII Gneisenau • VII Prinz Heinrich • VII Scharnhorst • VII AL Prinz Heinrich • VII Scharnhorst B • VII Scharnhorst '43 • VIII Tirpitz • VIII Bismarck • VIII Zieten • VIII Odin • VIII Brandenburg • VIII Anhalt • VIII Brandenburg B • VIII Tirpitz B • IX Friedrich der Grosse • IX Prinz Rupprecht • IX Pommern • IX Pommern B • X Grosser Kurfürst • X Schlieffen • X Preussen • X Mecklenburg • ★ Hannover
Pan-Asia	IX Bajie • IX Wujing • IX Sun Yat-Sen • IX Louchuan
Europe	V Viribus Unitis • IX Karl XIV Johan
Italy	IV Dante Alighieri • V Conte di Cavour • V Giulio Cesare • VI Andrea Doria • VII Francesco Caracciolo • VIII Vittorio Veneto • VIII Roma • VIII AL Littorio • IX Lepanto • IX Marco Polo • IX Giuseppe Verdi • X Cristoforo Colombo • X Ruggiero di Lauria
Netherlands
Commonwealth	VII Yukon
Spain
Pan-America	V Rio de Janeiro • VIII Atlântico

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Compatible Upgrades