Duncan

13.9

Duncan

Battleship | U.K. | Tier IX

Tech Tree Position

stock

 top

General

Research price180000 exp

Purchase price15,000,000

Hit Points66,900

Main Battery

419 mm/45 Mk.I on a Mk.I mount3 х 3 pcs.

Rate of Fire2.03 shots/min.

Reload Time29.5 sec.

Rotation Speed6 deg./sec.

180 Degree Turn Time30 sec.

Firing Range17.9 km.

Maximum Dispersion213 m.

HE Shell419 mm HE Mk Ia

Maximum HE Shell Damage6,150

Chance of Fire on Target Caused by HE Shell47 %

Initial HE Shell Velocity792 m./s.

HE Shell Weight995 kg.

AP Shell419 mm AP Mk IIa

Maximum AP Shell Damage13,050

Initial AP Shell Velocity747 m./s.

AP Shell Weight1157 kg.

Secondary Armament #1

152 mm/50 BL Mk.XXII on a Mk.XVIII mount6 х 2 pcs.

Firing Range6.95 km.

Rate of Fire5 shots/min.

Reload Time12 sec.

HE Shell152 mm HE Mk V

Maximum HE Shell Damage2,150

Initial HE Shell Velocity884 m./s.

Chance of Fire on Target Caused by HE Shell9 %

Secondary Armament #2

113 mm/45 QF Mk.I/III on an RP10 Mark II BD mount8 х 2 pcs.

Firing Range6.95 km.

Rate of Fire12 shots/min.

Reload Time5 sec.

HE Shell113 mm HE 5crh

Maximum HE Shell Damage1,700

Initial HE Shell Velocity746 m./s.

Chance of Fire on Target Caused by HE Shell8 %

Torpedo Tubes

622 mm PR Mk II2 х 1 pcs.

Rate of Fire1.09 shots/min.

Reload Time55 sec.

Rotation Speed12 deg./sec.

180 Degree Turn Time15 sec.

Torpedo622 mm Mk I

Maximum Damage29,367

Torpedo Speed67 knot

Torpedo Range9.99 km.

AA Defense

113 mm/45 QF Mk.I/III on an RP10 Mark II BD mount8 х 2 pcs.

. . . Average Damage per Second71.2

. . . Firing Range5.01 km.

40 mm/56 OQF Mk.1/2 on a Mk.IV mount10 х 2 pcs.

. . . Average Damage per Second227

. . . Firing Range3.51 km.

20 mm Oerlikon Mk.I on a Mk.IIA mount10 х 1 pcs.

. . . Average Damage per Second36

. . . Firing Range2.01 km.

40 mm/39 Vickers QF Mk.VIII on a Mk.VII mount4 х 4 pcs.

. . . Average Damage per Second51.6

. . . Firing Range2.49 km.

Maneuverability

Maximum Speed32 knot

Turning Circle Radius910 m.

Rudder Shift Time23.3 sec.

Concealment

Surface Detectability Range14.88 km.

Air Detectability Range11.56 km.

Battle Levels

12345678910

13.9

Duncan

Battleship | U.K. | Tier IX

Tech Tree Position

stock

 top

General

Research price180000 exp

Purchase price15,000,000

Hit Points75,200

Main Battery

419 mm/45 Mk.I on a Mk.I mount3 х 3 pcs.

Rate of Fire2.03 shots/min.

Reload Time29.5 sec.

Rotation Speed6 deg./sec.

180 Degree Turn Time30 sec.

Firing Range19.69 km.

Maximum Dispersion213 m.

HE Shell419 mm HE Mk Ia

Maximum HE Shell Damage6,150

Chance of Fire on Target Caused by HE Shell47 %

Initial HE Shell Velocity792 m./s.

HE Shell Weight995 kg.

AP Shell419 mm AP Mk IIa

Maximum AP Shell Damage13,050

Initial AP Shell Velocity747 m./s.

AP Shell Weight1157 kg.

Secondary Armament #1

152 mm/50 BL Mk.XXII on a Mk.XVIII mount6 х 2 pcs.

Firing Range6.95 km.

Rate of Fire5 shots/min.

Reload Time12 sec.

HE Shell152 mm HE Mk V

Maximum HE Shell Damage2,150

Initial HE Shell Velocity884 m./s.

Chance of Fire on Target Caused by HE Shell9 %

Secondary Armament #2

113 mm/45 QF Mk.I/III on an RP10 Mark II BD mount8 х 2 pcs.

Firing Range6.95 km.

Rate of Fire12 shots/min.

Reload Time5 sec.

HE Shell113 mm HE 5crh

Maximum HE Shell Damage1,700

Initial HE Shell Velocity746 m./s.

Chance of Fire on Target Caused by HE Shell8 %

Torpedo Tubes

622 mm PR Mk II2 х 1 pcs.

Rate of Fire1.09 shots/min.

Reload Time55 sec.

Rotation Speed12 deg./sec.

180 Degree Turn Time15 sec.

Torpedo622 mm Mk I

Maximum Damage29,367

Torpedo Speed67 knot

Torpedo Range9.99 km.

AA Defense

113 mm/45 QF Mk.I/III on an RP10 Mark II BD mount8 х 2 pcs.

. . . Average Damage per Second71.2

. . . Firing Range5.01 km.

20 mm Oerlikon Mk.I on a Mk.IIA mount18 х 1 pcs.

. . . Average Damage per Second64.8

. . . Firing Range2.01 km.

40 mm/56 OQF Mk.1/2 on a Mk.IV mount10 х 2 pcs.

. . . Average Damage per Second227

. . . Firing Range3.51 km.

20 mm Oerlikon Mk.II on a Mk.V mount10 х 2 pcs.

. . . Average Damage per Second61

. . . Firing Range2.01 km.

40 mm/39 Vickers QF Mk.VIII on a Mk.VI mount4 х 8 pcs.

. . . Average Damage per Second79.2

. . . Firing Range2.49 km.

Maneuverability

Maximum Speed32 knot

Turning Circle Radius910 m.

Rudder Shift Time16.6 sec.

Concealment

Surface Detectability Range14.88 km.

Air Detectability Range11.56 km.

Battle Levels

12345678910

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	2	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.
Refer to the in-game Port screens for more useful data.

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 29.5 seconds, which can be reduced to 26 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:

1. Hull: Upgrade to Hull (B) for improved survivability and maneuverability. Research of this module unlocks progression to St. Vincent.
2. 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

Historical Info

Duncan, 19??

Construction

Builder:

Laid down:

Launched:

Commissioned:

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Specifications

? tons displacement, standard

?m length

?m beam

?m draft (mean)

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Machinery

12 boilers, 3 turbines [e.g.]

---

Performance

? knots at ? shaft horsepower

?nm range at ? knots

---

Armor

Main belt: ?mm

Torpedo bulkhead: ?mm

Decks: ?mm main, ?mm upper deck

Turrets: ?mm

Conning tower: ?mm

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Armament

Main

? (?x?) ?mm rifles

Secondary

? (?x?) ?mm dual purpose? rifles

Anti-Aircraft

? (?x?) ?mm guns

Torpedoes

? (?x?) ?mm torpedo tubes

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Aircraft

Three (3) ? float planes, one catapult

Historical Gallery

References

Ship Change Log

See here for links to Update notes.

• Available for testing by supertesters in the game starting from Update 0.11.4.

Testing Changes

• DevBlog 310:
  • Preliminary characteristics.
• DevBlog 328:
  • Main battery sigma parameter increased from 1.5 to 1.6.
  • Main battery firing range with the stock Gun Fire Control System module increased from 17.2 to 17.9 km.
  • Main battery firing range with the researchable Gun Fire Control System module increased from 18.9 to 19.7 km.
• DevBlog 332:
  • Maximum torpedo damage increased from 21,064 to 29,367.
  • Torpedo arming distance reduced from 1500 to 540 m. Torpedo launch sectors in the direction to the bow of the ship were slightly reduced as well.
• DevBlog 336:
  • Main battery reload time increased from 30 to 31 s.

• Update 0.11.6:
  • Available in early access as 1 of 70 random bundles available in the armory for 1000 doubloons each.
• Update 0.11.7:
  • Fixed a bug that caused some secondary battery mounts to shoot at incorrect angles; the firing sectors of the affected turrets have been slightly reduced at short ranges.
• Introduced into the game as a researchable ship in Update 0.11.8.
• Update 0.11.8
  • Minor fixes to geometry and textures of the ship.
• Update 0.11.10:
  • Minor fixes to the geometry and textures of the ship.
• Update 12.3:
  • Fixed the geometry and textures of the ship.
• Update 13.1:
  • Main Battery reload time decreased from 31 to 29.5 s.
  • Repair Party consumable reload time increased from 80 to 100 s.

Ships of U.K.

Battleships