GamingDiver / WoWs Legends Ships / ARP Haruna
World of Warships: Legends ship guide

ARP Haruna

Beta
Japan · Tier IV · Battleship
Secondary battleshipClose to secondary range and stack auto-fire with your main guns.
Playstyle
  • Anchor a flank at 12-15 km with bow toward the closest threat, then use the speed advantage at 30 kn to…
  • Avoid: Using the 30-kn speed to push rather than to rotate
Key characteristics
356 mm overmatch1.8 sigma accuracy15 km gun rangeStrong secondaries (5 km)Easily spotted
Arpeggio collaboration variant

Collaboration ships are kept separate from base hulls unless an official collaboration source clearly ties the variant to that page.

Community Data

ARP Haruna Community Stats

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Playstyle

Overview

ARP Haruna is a Tier IV Japanese fast battleship at 30 kn. Mobility lets her rotate flanks battleship-fast and pick fights where her guns get the first salvo. Standout traits: best HE alpha in T4 BBs (5,700) and best AA reach in T4 BBs (5 km).

Positioning

Anchor a flank at 12-15 km with bow toward the closest threat, then use the speed advantage at 30 kn to rotate to the cap that needs a second battleship rather than the one your team already has. Mobility means you can pick which fight you are in; do not waste it by holding center the whole match.

Potato Avoidance

Using the 30-kn speed to push rather than to rotate

The mobility advantage is about picking which cap fight you arrive at, not about leading the brawl line; a fast BB that overextends loses HP that the kit cannot trade back.

Signature Traits

High HP pool

54100.0 HP, best of T4 BBs.

Heavy HE shells

5700.0 damage per HE shell, best of T4 BBs. Punishes superstructure and modules harder than peers.

Punchy HE secondaries

2500.0 max HE alpha per secondary shell, best of T4 BBs. Bigger per-shell damage than peers.

Long-reach AA

5.0 km AA reach, best of T4 BBs.

Stiff AP fuse

59.0 mm AP arming threshold, worst of T4 BBs. Over-pens thin plates; the trade-off pays off when most targets are battleship belt armor.

Sluggish rudder

19.4 s rudder shift, bottom decile of T4 BBs. Hard to dodge incoming AP; lean on island cover.

Acquisition

How to get ARP Haruna

ARP Haruna is a Premium ship and not available to unlock in the Tech Tree. Acquisition path: Containers. Container chances are shown as the listed odds of receiving this exact ship, dividing grouped ship-pool odds across the resolved ships and including nested container paths when a crate can drop another crate.

Best listed chance for this ship

  • Arpeggio Crate 2.5% IV ARP ship: ARP Haruna Collaboration containers · Arpeggio Crate
Official WG availability sources
Show direct source rows

Builds Beta

Build for main-battery accuracy, survivability, and secondary range/grouping if leaning into the commander flavor.

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Cohort position

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Where ARP Haruna sits among Tier IV BBs (24 ships). Notable standouts are shown first; the rest of the cohort-ranked stats are in the expand below. Acquisition variants (Black Friday, Founders Edition) are counted once with their base ship, not as separate peers.

BestHit points54,100 HP (1 of 3 tied) BestMax speed30 kt (1 of 4 tied) BestMain battery caliber356 mm (1 of 10 tied) BestHE shell damage5,700 (1 of 4 tied) BestHE alpha2,500 (1 of 4 tied) BestEngine power136,000 hp (1 of 3 tied) BestTurn-speed retention176.6 hp/m (1 of 3 tied) BestPower-to-weight3.51 hp/t (1 of 3 tied) BestAA range5 km (1 of 5 tied) Top 10%Secondary DPM (per side)210,600 (3/24) Top 25%Main battery range15.29 km (5/24) Top 25%AP shell damage10,000 (7/24) Top 25%Secondary range4.55 km (4/24) Bottom 25%Stealth profile13.61 km / 10.89 km (21/24 / 22/24) Bottom 25%Rudder shift19.4 s (22/24) Bottom 25%Traverse-to-turn ratio2.87 × (19/24) Bottom 25%Fires per minute4.44 (21/24) Bottom 25%Acceleration8.8 s (20/24) Bottom 25%Max armor254 mm (20/24) WorstAP arming threshold59 mm (1 of 9 tied) WorstDisplacement38,767 t (1 of 3 tied) WorstNo torpedoes (21 of 24 in cohort)
See 20 mid-pack stats

Not standouts for ARP Haruna -- here's where she sits on every other ranked stat in the cohort. Stats tagged NORM are tied across more than half the cohort, so the value is the cohort default rather than a standout.

Main battery reload27 s(12/24) Sigma1.8(11/24) HE fire chance25%(18/24) HE DPM101,333(11/24) AP DPM177,778(17/24) Main dispersion184.1 m(8/24) Secondary fire chance9%(13/23) Secondary HE pen25 mm(9/23) AP velocity790 m/s(17/24) HE velocity805 m/s(13/24) AA DPS164(10/24) AA threat506(9/23) Repair charges3(11/24) Citadel belt203 mm(14/23) Bow armor30 mm(12/23) Stern armor30 mm(13/23) Deck armor127 mm(7/23) NormSecondary dispersion bracket57(20 of 24 tied at this value) NormAP fuse timer0.03 s(13 of 24 tied at this value) NormRepair heal rate0.5 %/s(20 of 24 tied at this value)

Stats & specs

Customize in the Build Tool →Shell ballistics chartMore tools in the WoWS Legends Data Lab

All values are ship base stats with modifications and upgrade changes denoted inline.

Repair 3Fighter
Survivability
Hit Points54,100
Displacement38,767 t
Armor range6–254 mm
Plate armor thicknesses6, 13, 19, 25, 30, 38, 63, 70, 76, 89, 102, 110, 120, 121, 127, 152, 203, 254 mm
Armor material/layer entries59
Fire resistance16.6%
Fire duration60 s
Torp Reduction25%
Magazine HP
ƒThe magazine is the module a detonation comes from. Penetrating hits to it raise the detonation chance from 1% toward 30% as its HP is worn down, so a larger magazine pool rides out citadel hits longer before a detonation becomes likely.
27,100
Steering gear HP
ƒDurability of the steering gears. As this pool drops, hits are likelier to jam the rudder; unlike most modules the steering can be knocked out and repaired but is never permanently destroyed.
16,200
Main Battery
Module356 mm/45 Type41
Mounts / barrels4 mounts / 8 barrels
Reload time30 s
Firing range (base)13.9 km
Firing range (top fire control)15.3 km
Turret traverse3.3 °/s
Shell Grouping (σ)
ƒShell grouping (sigma); shown in-game as Shell Grouping.
1.8
Max Horiz Disp
ƒHorizontal dispersion ellipse width at max range. (R/30·(idealRadius−minRadius)/idealDistance + minRadius)·30 = (13899/30·(10−2.8)/1000 + 2.8)·30 = 184.1 m
184.1 m
Max Vert Disp
ƒVertical dispersion ellipse height at max range = max horizontal × radiusOnMax = 184.1 × 0.8 = 147.3 m
147.3 m
Med Horiz Disp
ƒ50%-hit horizontal radius = max horizontal × GetHalfHitsRatio(σ) = 184.1 × 0.344 (σ=1.8) = 63.3 m
63.3 m
Med Vert Disp
ƒ50%-hit vertical radius = max vertical × GetHalfHitsRatio(σ) = 147.3 × 0.344 (σ=1.8) = 50.6 m
50.6 m
Turret turn time
ƒ180 degrees / 3.3 deg/s traverse speed = 54.5 s.
54.5 s
Base shells/min
ƒ8 broadside guns x 60 / 30 s base reload = 16.
16
HE shells
HE Damage5,700
HE Velocity805 m/s
Fire Chance25%
HE penetration
ƒ59 mm ≈ 356 mm caliber / 6 (standard HE penetration ratio).
59 mm
HE full-salvo alpha
ƒ5,700 HE damage x 8 broadside guns = 45,600.
45,600
Base HE DPM
ƒ45,600 HE full-salvo alpha x 60 / 30 s base reload = 91,200.
91,200
Base fires/min
ƒ8 HE shells x 60 / 30 s reload x 25% fire chance = 4.
4
AP shells
AP Damage10,000
AP Velocity790 m/s
Min Ricochet45 deg
Guaranteed Ricochet60 deg
Fuse Timer0.033 s
Fuse Threshold59 mm
AP overmatch
ƒfloor(356 mm caliber / 14.3) = 24 mm (AP auto-penetrates plating this thick or less).
24 mm
AP Pen Close
ƒCanonical community AP formula (jcw780/wows_shell), evaluated at muzzle velocity: 1e-7 × Krupp × mass^0.69 × caliber_m^-1.07 × v0^1.38 = 1e-7 × 2300 × 635.5^0.69 × 0.356^-1.07 × 790^1.38 = 595 mm. Matches the in-game spec card.
595 mm
AP Pen Far
ƒSame formula at the ship's max firing range (19.1 km), where the shell has slowed to 414.4 m/s: 1e-7 × 2300 × 635.5^0.69 × 0.356^-1.07 × 414.4^1.38 = 244.3 mm.
244.3 mm
AP full-salvo alpha
ƒ10,000 AP damage x 8 broadside guns = 80,000.
80,000
Base AP DPM
ƒ80,000 AP full-salvo alpha x 60 / 30 s base reload = 160,000.
160,000
AP AOE Radius
ƒAP shell over-penetration splash radius; scales with shell mass. Wickes 102mm = 3, standard 152mm CL ~ 20, Iowa 406mm ~ 270, Yamato 460mm = 400, Incomparable 650mm = 550 (max). Larger value = bigger splash damage area when AP over-pens.
24
AA Defense
AA mount points12
Close-range AA DPS
ƒSum across every AA aura on this ship of (aura.continuous_damage x 3.5 x aura.hit_probability). Here: (20×3.5×0.75) + (19×3.5×0.85) + (21×3.5×0.75) = 164. Covers AA-only mounts plus dual-purpose secondaries (Bismarck 105mm, USN 5"/38 cruiser secondaries) and dual-purpose main batteries (Sumner-class 5"/38, Akizuki-line 100mm). Formula validated against in-game captures on California, Sumner, Manfred von Richthofen, Dante Alighieri (exact) and within +/-17% on the remaining verified ships.
164
Maximum AA range
ƒLongest-reaching aura across AA-only + dual-purpose auras.
5 km
25 mm Type96 mod. 16×2 25mm
13 mm Type932×4 13mm
13 mm Type934×2 13mm
127 mm Type89 A1 (DP)4×2 127mm
Far aura
DPS
ƒIncludes 21 continuous AA damage from dual-purpose secondaries firing as AA in this range band.
21
Range5 km
Medium aura
DPS20
Range3.1 km
Total DPS in Aura
ƒFar 21 + Medium 20 = 41
41
Near aura
DPS19
Range1.2 km
Total DPS in Aura
ƒFar 21 + Medium 20 + Near 19 = 60
60
S
Secondary Battery
Mounts18
Firing range4.55 km
Shell Grouping (σ)1
Secondary dispersion type
ƒMax dispersion = range (km) × 57 + 30. Each dispersion type sets its own slope; this is not a percentage applied to a standard baseline.
Standard
Max secondary dispersion @ 4.55 km
ƒ4.55 km × 57 + 30 = 289.3 m.
289.3 m
127 mm Type89 A1 (×4)
Caliber127 mm
Reload time5 s
HE Damage2,200
Muzzle Velocity725 m/s
Fire Chance8%
Armor Pen21 mm
Min Ricochet91°
Max Ricochet60°
Show 1 more gun family
152 mm 41st Year Type (×14)
Caliber152 mm
Reload time10 s
HE Damage2,500
Muzzle Velocity825 m/s
Fire Chance9%
Armor Pen25 mm
Min Ricochet91°
Max Ricochet60°
Maneuverability
Engine moduleEngine: 136,000 hp
Engine power136,000 hp
Maximum speed30 kt
Turning circle radius770 m
Engine power multiplier speed threshold7 kt
Traverse-to-turn ratio2.9× drags
Concealment
Detectability by sea13.61 km
Detectability by air10.89 km
Smoke firing penalty11.8 km
Detect after firing main guns13.61 km
Detect Fire Sea15.61 km
Detect Fire Air13.89 km
Guaranteed Detect2 km
✦
Consumables
Damage Control Party∞ charges · 80 s reload · 10 s active
Repair Party3 charges · 80 s reload · 28 s active · 0.5% heal per second · 14% of max HP total heal
Choose one
Catapult Fighter3 charges · 60 s reload · 55 s active · 5.56 km patrol radius · 1 squadron size
Observation Seaplane3 charges · 200 s reload · 30 s active · 1 squadron size · +10% main-battery range bonus
Secondary Battery Booster3 charges · 160 s reload · 30 s active · +100% damage boost · +50% reload boost
Module options (1)

Stats above use the fully-upgraded modules. These are the research-tree alternatives; trade-offs are flagged.

HullUpgrade
  • Turret traverse3.3 → 5 °/s

See all derived stats

Show ▾

Numbers the spec table cannot show directly: alpha-strike math, DPM, dispersion, AP penetration. Click the formula chip on any row to reveal how it is calculated.

Main battery formulas

Shell Grouping (σ)1.8
Shell grouping (sigma); shown in-game as Shell Grouping.
Max Horiz Disp184.1 m
Horizontal dispersion ellipse width at max range. (R/30·(idealRadius−minRadius)/idealDistance + minRadius)·30 = (13899/30·(10−2.8)/1000 + 2.8)·30 = 184.1 m
Max Vert Disp147.3 m
Vertical dispersion ellipse height at max range = max horizontal × radiusOnMax = 184.1 × 0.8 = 147.3 m
Med Horiz Disp63.3 m
50%-hit horizontal radius = max horizontal × GetHalfHitsRatio(σ) = 184.1 × 0.344 (σ=1.8) = 63.3 m
Med Vert Disp50.6 m
50%-hit vertical radius = max vertical × GetHalfHitsRatio(σ) = 147.3 × 0.344 (σ=1.8) = 50.6 m
AP Pen Close595 mm
Canonical community AP formula (jcw780/wows_shell), evaluated at muzzle velocity: 1e-7 × Krupp × mass^0.69 × caliber_m^-1.07 × v0^1.38 = 1e-7 × 2300 × 635.5^0.69 × 0.356^-1.07 × 790^1.38 = 595 mm. Matches the in-game spec card.
AP Pen Far244.3 mm
Same formula at the ship's max firing range (19.1 km), where the shell has slowed to 414.4 m/s: 1e-7 × 2300 × 635.5^0.69 × 0.356^-1.07 × 414.4^1.38 = 244.3 mm.
HE penetration59 mm
59 mm ≈ 356 mm caliber / 6 (standard HE penetration ratio).
AP overmatch24 mm
floor(356 mm caliber / 14.3) = 24 mm (AP auto-penetrates plating this thick or less).
AP AOE Radius24
AP shell over-penetration splash radius; scales with shell mass. Wickes 102mm = 3, standard 152mm CL ~ 20, Iowa 406mm ~ 270, Yamato 460mm = 400, Incomparable 650mm = 550 (max). Larger value = bigger splash damage area when AP over-pens.
Broadside guns used for alpha8
All 8 barrels bear on the broadside.
Turret turn time54.5 s
180 degrees / 3.3 deg/s traverse speed = 54.5 s.
HE full-salvo alpha45,600
5,700 HE damage x 8 broadside guns = 45,600.
AP full-salvo alpha80,000
10,000 AP damage x 8 broadside guns = 80,000.
Base HE DPM91,200
45,600 HE full-salvo alpha x 60 / 30 s base reload = 91,200.
Base AP DPM160,000
80,000 AP full-salvo alpha x 60 / 30 s base reload = 160,000.
Base shells/min16
8 broadside guns x 60 / 30 s base reload = 16.
Base fires/min4
8 HE shells x 60 / 30 s reload x 25% fire chance = 4.

AA defense

Close-range AA DPS164
Sum across every AA aura on this ship of (aura.continuous_damage x 3.5 x aura.hit_probability). Here: (20×3.5×0.75) + (19×3.5×0.85) + (21×3.5×0.75) = 164. Covers AA-only mounts plus dual-purpose secondaries (Bismarck 105mm, USN 5"/38 cruiser secondaries) and dual-purpose main batteries (Sumner-class 5"/38, Akizuki-line 100mm). Formula validated against in-game captures on California, Sumner, Manfred von Richthofen, Dante Alighieri (exact) and within +/-17% on the remaining verified ships.
Maximum AA range5 km
Longest-reaching aura across AA-only + dual-purpose auras.
AA threat index506
SUM over AA auras of (aura DPS x aura range km). A plane crossing the AA bubble is exposed to each aura for a time proportional to that aura's range, so long-reach DPS is worth more than the same DPS in a short bubble. Units: DPS*km; used to rank overall AA threat across the cohort.
Near aura range1.2 km

Secondary battery dispersion

Secondary dispersion typeStandard
Max dispersion = range (km) × 57 + 30. Each dispersion type sets its own slope; this is not a percentage applied to a standard baseline.
Max secondary dispersion @ 4.55 km289.3 m
4.55 km × 57 + 30 = 289.3 m.

Secondary battery firepower

Secondary DPM (per side)210,600
Sum across all secondary families of (per-side barrels × 60 / reload_s × alpha), where per-side barrels = mounts × barrels-per-mount / 2 (the guns that bear on one broadside target). Per-family: 4×2 127 mm (4/side) × 60/5 × 2200 = 105,600 + 14×1 152 mm (7/side) × 60/10 × 2500 = 105,000. Assumes every shell hits (real hit rate is lower; the Brawl matchup tool on the Compare page folds in dispersion + target armor).
Max HE alpha2500
Maximum HE damage per shell across secondary HE families. Best on this ship: 2500 from the 152 mm family.
Max HE fire chance9%
Maximum per-shell fire chance across secondary HE families (before target fire resistance is applied). Best on this ship: 9% from the 152 mm family.
Max HE pen25 mm
Maximum HE armor penetration across secondary HE families (caliber × 1/6 for most nations; 1/4 for German/UK BBs). Shells whose pen falls under a plate's armor thickness shatter for 0 hull damage though fire chance still applies. Best on this ship: 25 mm from the 152 mm family.

Armor

Hull HP 54,100, distributed across 5 hull zones, each with its own plate thicknesses, saturation cap, and pen thresholds. HP caps are the exact in-game values, not estimated.

Section Plates HP cap Threats Tactic
Bow30 mm primary (range 19–76 mm)2,900 (5% of HP)
Overmatch not possible at T VAngle bounces 410mm30 mm: HE pens from 203mm+
Bow-tank fits behind this exterior plate. Saturation is FAST here; the cap is often only a few thousand HP.
Hull (midship)152 mm primary (range 19–203 mm)40,600 (75% of HP)
No common caliber overmatches152 mm: no common HE pens
Largest HP pool. Citadel sits behind these plates; thinner deck and side plating absorb the rest.
Stern30 mm primary (range 19–89 mm)1,500 (3% of HP)
Overmatch not possible at T VAngle bounces 410mm30 mm: HE pens from 203mm+
Mirror of bow. Same fast saturation.
Citadel203 mm primary (range 6–203 mm)≈ 165,500 (effectively no cap)
Citadel pen ×0.10 damageOver-pen: ×0.10 damage
Effectively no cap; citadel pool sits at ~165k HP on every ship. Damage is gated by pen/over-pen multipliers instead (×0.10 direct pen, ×0.10 over-pen).
Superstructure13 mm primary (range 13–254 mm)1,600 (3% of HP)
Any HE ≥16 mm pens at full damage
Any HE ≥16 mm pens at full damage. HE-spam target, and the section saturates fast (often only a few thousand HP).
Turret (module, per magazine)separate HP pool, does not drain ship HP27,100 magazine HPMagazine detonation1–30% chance · below ~75% HPPer-turret powder-magazine HP. Detonation chance scales from 1% (no mag damage) to 30% (full mag damage); this range is the in-game value. Detonation can't roll while the ship is above ~75% HP (the standard detonation-protection threshold, not a per-ship stat). Smaller magazines saturate to the 30% ceiling faster.
Secondary mount (152 mm mount)separate HP pool, does not drain ship HP800 per-mount HPDestroyed at 0 HPPer-mount HP for the heaviest secondary on this ship. A mount destroyed at 0 HP is out for the rest of the battle; DCP does not repair destroyed mounts. Smaller (lighter-caliber) secondaries typically share the same HP value.
AA mount (25 mm mount)separate HP pool, does not drain ship HP200 per-mount HPDestroyed at 0 HPPer-mount HP for the heaviest AA on this ship. An AA mount destroyed at 0 HP stops shooting down planes for the rest of the battle; DCP does not repair destroyed mounts. HE shells specifically target AA mounts since the small-caliber HP pool falls fast.
Rudder (module)separate HP pool, does not drain ship HP16,200 module HPIncapacitated at 0 HPWhen module HP reaches 0 the rudder locks at its current angle until DCP repairs it. Repair via Damage Control Party.

Saturation cap = HP a section can absorb before further damage to it is reduced (the "bow-tank" effect). Citadel pool is ~165k on every ship (effectively no cap); damage is gated by pen/over-pen multipliers instead. Superstructure saturates fast but HE always pens regardless of the plate thickness. Rudder (and other module HPs) are a separate pool from ship HP: damaging a module doesn't drain ship HP. Incapacitated modules like the rudder and engine are restored by DCP, but secondary and AA mounts destroyed at 0 HP stay out for the rest of the battle.

Shell ballistics chart

AP penetration, impact velocity, flight time and impact angle vs range. Click to load the interactive chart.
Exteriors

Skins & permanent camouflages

Every custom exterior ARP Haruna can equip, from in-game data.

  • ARP Haruna default exterior
    DefaultThe ship’s standard exterior
  • Arpeggio
    HarunaArpeggio

Primary official WG sources

Filtered to official World of Warships: Legends pages where this ship is a focus, reward, line member, or high-context variant mention.

2021-07-23 · Official ship feature / stats Arpeggio of Blue Steel -Ars Nova-: everything you need to know Variant source 2022-12-08 · Patch notes December Update: The Most Wonderful Tide of the Year Patch notes