GamingDiver / WoWs Legends Ships / Haarlem

World of Warships: Legends ship guide

Haarlem

Also called: 哈勒姆 Beta

Netherlands · Tier VII · CA Cruiser · Tech Tree: Airstrike Cruisers

Airstrike cruiserMain battery up front plus airstrike pressure on distant caps.

Playstyle

Sit 12-15 km from a contested cap where an island shadows you from the opposite battleship line
Avoid: Launching airstrikes at maneuvering targets

Key characteristics

SonarDefensive AAExtra heal chargesHeavy citadel beltPattern widens fast with range

On this page

Community stats
Playstyle
How to get Haarlem
Builds
Cohort position
Stats and specs
Armor
Charts
Balance history
Exteriors

Community Data

Haarlem Community Stats

Log in to GamingDiver and upload your data to see Community Data for Haarlem: community win rate, damage, survival, spotting, and your own comparison.

Playstyle

Overview

Haarlem is the Tier VII Dutch airstrike cruiser. The alt-armament fires a bomber line instead of torpedoes, so her damage profile is main battery up front plus airstrike pressure on distant caps. Sonar (5 km on ships and 3.5 km on torpedoes, 100 s active, 180 s reload, long uptime) lights up DDs and torpedoes inside its bubble, which lets her contest the cap edge without taking the spotting cycle. Standout traits: best Repair Party charges in T7 CAs (3) and best heavy citadel belt in T7 CAs (200 mm).

Positioning

Sit 12-15 km from a contested cap where an island shadows you from the opposite battleship line. Hydro (5 km on ships, 3.5 km on torpedoes) lights up DDs and incoming torpedoes inside its bubble, so you can push the cap edge from cover without taking the spotting cycle; prefer cover positions over open-water flanks. With 11.2 s on the rudder she starts turning late, so the angle has to be set before you are shot at.

Potato Avoidance

Launching airstrikes at maneuvering targets

The squadron's travel time is long enough that a healthy DD or cruiser with engine boost simply turns out of the cone. Reserve strikes for capping destroyers, island-huggers, and anyone already tying up with a teammate.

Signature Traits

Airstrike alt-armament

The alt-armament fires a bomber line in place of torpedoes. Rewards behind-cover positioning with the cap in range.

ELITE REPAIR PARTY ↗

Extra heal charges · 3 Repair
Fast heal cycle · 40 s

ELITE ARMOR ↗

Heavy citadel belt · 200 mm
Thickest plate · 200 mm

Long-reach AA ↗

5.2 km AA reach, top decile of T7 CAs.

AP overmatch specialist ↗

Caliber-driven overmatch reaches armor thicknesses most cohort peers can't crack. Punish bow-tankers.

Pattern widens fast with range ↗

Shell pattern widens about 11.4 m per km of range, bottom decile of T7 CAs. Salvos spread more at any given distance than peers', so bracketing matters (this is range-normalized, so out-ranging peers does not count against her).

Acquisition

How to get Haarlem

Haarlem is available in the Airstrike Cruisers branch of the Netherlands Tech Tree for 18,000,000 credits after researching it in the branch. Known module upgrades cost up to 4,500,000 credits. Official source cards below may also show its temporary Early Access window before it became a normal Tech Tree unlock. 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.

Show Netherlands tech-tree branch diagram

Netherlands Tech Tree

Haarlem sits in the Airstrike Cruisers branch. The highlighted path shows the local branch context inside the full Netherlands tree.

5 ships in highlighted branch · scroll to inspect all Netherlands lines.

NetherlandsIIIIIIIVVVIVIIVIII★

Cruiser

Tier ★Gouden LeeuwPHSC110 Tier VIIIJohan de WittPHSC109 Tier VIIHaarlemPHSC108 Tier VIEendrachtPHSC107 Tier VKijkduinPHSC106 Tier IVCelebesPHSC105 Tier IIIDe RuyterPHSC104 Tier IIJavaPHSC103 Tier IGelderlandPHSC102

Best listed chance for this ship

Anniversary '25 Dutch crate 1% VII Haarlem Event · Anniversary '25 Dutch crate
Dutch Cruiser crate 0.01% VII Haarlem Early access · Dutch Cruiser crate

Official WG availability sources

Official WoWS Legends container odds Containers Official container drop rows linked below include direct and nested effective ship odds.
March Update: Thirst for Combat 750,000 Global XP 2025-02-27 Tier VII default; exact price not in source

Show direct source rows

Anniversary '25 Dutch crate 1% · VII Haarlem
Dutch Cruiser crate 0.01% · VII Haarlem

Want the full picture? Each container page charts the odds as you open more crates - including ~~pity~~ guaranteed-reward timers and, for GD Supporters, pack math personalized to your port.

Builds

Pair with a commander whose unique skill complements her main armament; check the build tool for current recommendations.

Karel Doorman

Airstrike specialist

InspirationsCornelis van der Windt · Commander Worf

Doorman extends airstrike range, cruise speed, and plane HP via Bird's Eye View / Sea Wings / Iron Feathers so your bombers reach the target and survive AA. Cornelis van der Windt's Flame Storm trait adds bomb burning chance for more fire starts; Worf's Sky Attack trait raises damage on every projectile your aircraft drop. Treat the airstrike like a long-range torpedo: drop bombs across the path of a target rotating to cap or hiding behind an island, then use your main battery to punish whoever you've forced into the open.

Karel Doorman

Fire DoT cruiser

InspirationsJohan Furstner · Cornelis van der Windt

Same Doorman skill spine (airstrike range / cruise speed / plane HP). Furstner's Minister of the Navy trait raises fire damage from your cruiser's shells or bombs; Cornelis van der Windt's Flame Storm adds bomb burning chance on top. Each fire that lands does more DPS, and you start more of them. Pairs well with Burn It Down XXL on the main battery so HE salvos and airstrike bombs both leave heavier DoT.

Open in Build Tool →

Commanders frequently paired with this ship Karel Doorman Cornelis van der Windt Johan Furstner

Have a build you swear by? Open it in the Build Tool and hit Save build to share it here.

Cohort position

Hide ▾

Where Haarlem sits among Tier VII CAs (56 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.

BestAP fuse timer0.03 s (1 of 24 tied) BestRepair charges3 (1 of 6 tied) BestCitadel belt200 mm (1/54) Top 10%Flak per wave (expected)1,944 (5/57) Top 10%Max armor200 mm (5/57) Top 25%Secondary fire chance7% (9/50) Top 25%Engine power140,000 hp (13/56) Top 25%Turn-speed retention191.8 hp/m (11/56) Top 25%AA range5.2 km (7/57) Bottom 25%Smoke fire bloom7.6 km (45/57) Bottom 25%Rudder shift11.2 s (51/57) Bottom 25%Fires per minute6 (43/49) Bottom 25%HE DPM131,538 (40/49) Bottom 25%AP DPM221,538 (46/57) Bottom 25%Displacement19,954 t (50/57) Bottom 25%Effective HE DPM (incl. fire)176,045 (41/49) Bottom 10%Main dispersion180.7 m (54/57) WorstNo torpedoes (15 of 57 in cohort) WorstRepair heal rate0.5 %/s (1 of 18 tied)

See 32 mid-pack stats

Not standouts for Haarlem -- 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.

Hit points40,100 HP(27/57) Max speed32.5 kt(43/57) Concealment13.15 km(42/57) Air detection7.89 km(41/57) Turning circle730 m(31/57) Traverse-to-turn ratio6.1 ×(24/57) Main battery caliber203 mm(18/57) Main battery range15.8 km(16/57) Main battery reload11.7 s(43/57) Sigma2(29/57) HE shell damage2,850(16/49) HE fire chance13%(27/49) AP shell damage4,800(18/57) Secondary DPM (per side)136,000(15/50) Secondary HE alpha1,700(19/50) Secondary HE pen20 mm(25/50) AP velocity925 m/s(17/57) HE velocity925 m/s(15/49) Acceleration26.4 s(30/56) AP arming threshold34 mm(41/57) Power-to-weight7.02 hp/t(31/56) AP pen at 10 km235 mm(17/57) AA DPS435(19/57) AA threat1,477(21/57) Bow armor25 mm(33/54) Stern armor25 mm(33/54) Deck armor60 mm(17/52) NormSecondary dispersion bracket57(47 of 50 tied at this value) NormAP ricochet start45°(40 of 57 tied at this value) NormAP auto-bounce angle60°(40 of 57 tied at this value) NormTurn speed retained81%(53 of 57 tied at this value) NormSecondary range5 km(46 of 50 tied at this value)

Peers in this cohort

Compare Tier VII Cruisers

Show all 56 peers

Stats & specs

Customize in the Build Tool →

Survivability

Hit PointsInitial: 36,250 → 40,100

Displacement19,954 t

Hull dimensions

Length x beam at the waterline, with the hull's draft where the client carries one. Ships whose client entry holds only the 260 x 20 m placeholder use a curated real-world figure instead, and any ship we have no trustworthy size for omits this row rather than print the placeholder. Length matters when dodging torpedoes; beam and draft shape how hard the ship is to hit.

210.4 x 25.73 m

Armor range16–200 mm

Plate armor thicknesses16, 25, 27, 30, 40, 50, 60, 75, 90, 100, 175, 200 mm

Armor material/layer entries64

Fire resistance

Does not reduce the damage a burning fire does per second: replay-measured burn ticks run at the full rate on every ship. By elimination it lowers how often hits set you on fire; ignition-rate replay data is consistent with that but too confounded by attacker mix to measure the reduction directly.

Initial: 33.3% → 36.6%

Fire duration30 s

Fire damage

Each fire ticks 0.3% of max HP per second for the full 30 s, so one unattended fire burns 9% of the pool (3,609 HP on this ship). 4 fire points can burn at once. Verified against measured burn ticks in replay data.

0.3% of HP per second

Flood duration40 s

Flood damage

A flood ticks 0.25% of max HP per second for the 40 s duration, so one unattended flood costs 10% of the pool (4,010 HP on this ship). Verified against measured flood ticks in replay data.

0.25% of HP per second

Torp Reduction

Reduces torpedo hit damage. Replay data shows no effect on floods: flood ticks run at the full rate and flood frequency does not decline with protection.

19%

Magazine HP

Per-turret powder-magazine HP, a separate pool from the ship's. Penetrating hits wear it down and the turret is likelier to be knocked out as it falls, so a larger pool keeps the guns firing through punishment that silences a peer's.

20,100

Steering gear HP

Durability 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.

12,000

Effective HP

Base 40,100 HP plus everything Repair Party can restore: 0.5%/s x 28 s = 5,614 HP per charge, x3 charges = 16,842 HP. Ceiling, not a prediction: a charge only restores damage actually taken, and only the regeneratable share of it. Across 1,826 players in our replay corpus the median ship realized about half of this, mostly because half the charges go unspent — when Repair Party IS pressed it returns ~97% of the per-charge figure above.

56,942

Repairable: penetration50%

Repairable: citadel10%

Repairable: steering gear50%

Main Battery

ModuleArtillery: 203 mm/60 SK C/34

Mounts / barrels3 mounts / 9 barrels

Reload time13 s

Firing range (base)14.4 km

Firing range (top fire control)15.8 km

Turret traverse8 °/s

Turret armor150 mm

Turret traverse arcs

How far each mount can train, in degrees to either side of the mount's own facing, read from in-game data. A rear turret with ±150° leaves a 60° blind wedge over the bow; one-sided arcs are wing mounts that cover a single side. The data does not say which way each mount faces, so the arcs are listed per mount without bow/stern angles.

2x ±150°, ±147°

Guns to bear

How far off the bow (or stern) the ship must angle before every main turret can fire: the widest blind wedge among the rear-facing (or forward-facing) mounts, from each mount's trainable arc. Mount facing is inferred from turret stations and verified against known layouts, including Izumo's aft-facing forward turret.

33° off bow / 30° off stern

See the firing-arcs diagram ↓

AP pen max range170 mm

HE fire DPM vs T7 BB40056

Effective HE DPM vs T7 BB158441

Shell Grouping (σ)2

Max Horiz Disp

Horizontal dispersion ellipse width at max range, from the verified WoWS dispersion model:

σ_{H} = (\frac{R}{30} \cdot \frac{idealRadius - minRadius}{idealDistance} + minRadius) \cdot 30

= (\frac{15796}{30} \cdot \frac{10 - 1.6}{1000} + 1.6) \cdot 30 = 180.7 m

180.7 m at 15.8 km

Max Vert Disp

Vertical dispersion ellipse height at max range:

σ_{V} = σ_{H} \cdot radiusOnMax

= 180.7 \cdot 0.6 = 108.4 m

108.4 m at 15.8 km

Med Horiz Disp

50%-hit horizontal radius:

σ_{H, 50} = σ_{H} \cdot \frac{0.6}{σ}

= 180.7 \cdot \frac{0.6}{2} = 54.2 m

54.2 m at 15.8 km

Med Vert Disp

50%-hit vertical radius:

σ_{V, 50} = σ_{V} \cdot \frac{0.6}{σ}

= 108.4 \cdot \frac{0.6}{2} = 32.5 m

32.5 m at 15.8 km

Turret turn time

180 degrees / 8 deg/s traverse speed = 22.5 s.

22.5 s

Shells/min

Zero upgrades: 9 broadside guns x 60 / 13 s base reload = 41.5. All upgrades (Main Battery Mod. 3 = -10% reload): 9 broadside guns x 60 / 11.7 s all-upgrades reload = 46.2.

Initial: 41.5 → 46.2

HE shells

HE Damage2,850

HE Velocity925 m/s

Fire Chance13%

HE penetration

34 mm ≈ 203 mm caliber / 6 (standard HE penetration ratio).

34 mm

HE full-salvo alpha

2,850 HE damage x 9 broadside guns = 25,650.

25,650

HE DPM

Zero upgrades: 25,650 HE full-salvo alpha x 60 / 13 s base reload = 118,385. All upgrades (Main Battery Mod. 3 = -10% reload): 25,650 HE full-salvo alpha x 60 / 11.7 s all-upgrades reload = 131,538.

Initial: 118,385 → 131,538

Fires/min

Zero upgrades: 41.5 shells/min x 13% fire chance = 5.4. All upgrades (Main Battery Mod. 3 = -10% reload): 46.2 shells/min x 13% fire chance = 6.

Initial: 5.4 → 6

AP shells

AP Damage4,800

AP Velocity925 m/s

Min Ricochet45 deg

Guaranteed Ricochet60 deg

Fuse Timer0.033 s

Fuse Threshold34 mm

AP overmatch

floor(203 mm caliber / 14.3) = 14 mm (AP auto-penetrates plating this thick or less).

14 mm

AP Pen Close

Canonical community AP formula (jcw780/wows_shell), evaluated at muzzle velocity:

P = 10^{- 7} \cdot K \cdot m^{0.69} \cdot d^{- 1.07} \cdot v_{0}^{1.38}

= 10^{- 7} \cdot 2409 \cdot 122^{0.69} \cdot {0.203}^{- 1.07} \cdot 925^{1.38} = 452.6 mm

. Matches the in-game spec card.

452.6 mm point-blank

AP Pen Far

Same formula at the ship's max firing range (15.8 km), where the shell has slowed to 454.2 m/s:

P = 10^{- 7} \cdot 2409 \cdot 122^{0.69} \cdot {0.203}^{- 1.07} \cdot {454.2}^{1.38} = 169.6 mm

169.6 mm at 15.8 km

AP full-salvo alpha

4,800 AP damage x 9 broadside guns = 43,200.

43,200

AP DPM

Zero upgrades: 43,200 AP full-salvo alpha x 60 / 13 s base reload = 199,385. All upgrades (Main Battery Mod. 3 = -10% reload): 43,200 AP full-salvo alpha x 60 / 11.7 s all-upgrades reload = 221,538.

Initial: 199,385 → 221,538

AP AOE Radius

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.

✈

Squadrons

Plane HP1,950

Plane max speed180 kn

Planes per strike4

OrdnanceHE bomb, 5,000 dmg

Fire chance30%

Bomb penetration34.3 mm

Bomb velocity300 m/s

Charges2

Range12 km

Reload100 s

Launch arc-124° to 124°

Plane HP2,050

Plane max speed180 kn

Planes per strike4

OrdnanceHE bomb, 5,300 dmg

Fire chance33%

Bomb penetration34.3 mm

Bomb velocity300 m/s

Charges2

Range12 km

Reload100 s

Launch arc-124° to 124°

AA Defense

AA mount points24

Maximum AA range

Longest-reaching family on the in-game AA card. Base AirDefense aura max range is 3.5 km; dual-purpose mount auras extend it.

5.2 km

40 mm/56 Bofors Model 1936Initial: 40 mm/56 Bofors (10×1) → 40 mm/56 Bofors Model 1936 (10×2)

20 mm OerlikonInitial: 20 mm Oerlikon Mk.II (14×1) → 20 mm Oerlikon (14×2)

120 mm/50 Model 1942 (DP)

Dual-purpose: your secondaries doing double duty against aircraft. The same mounts appear on the Secondary Battery card - shared guns, not extra hardware.

4×2 120mm

Guns120 mm/50 Model 1942 (DP)

Continuous DPS

Effective DPS in in-game units (raw aura damage × 3.5 × hit probability, summed per contributing aura) - matches the Close-range AA DPS headline's currency. Includes 110 from dual-purpose secondaries firing as AA in this range band.

110

Range5.2 km

Guns40 mm/56 Bofors Model 1936

Continuous DPS

Effective DPS: 54 raw aura damage × 3.5 × 0.9 hit probability = 170 - the same in-game units as the Close-range AA DPS headline.

Initial: 126 → 170

Range3.5 km

Total DPS in Aura

Far 110 + Medium 170 = 280

280

Guns20 mm Oerlikon

Continuous DPS

Effective DPS: 52 raw aura damage × 3.5 × 0.85 hit probability = 155 - the same in-game units as the Close-range AA DPS headline.

Initial: 95 → 155

Range2 km

Total DPS in Aura

Far 110 + Medium 170 + Near 155 = 435

435

Bursts

Each ~2 s wave fires 2 quick salvos of 4 clouds ahead of the attacking squadron, plus 1 stray cloud farther out that appear off-beat between waves - up to 9 clouds per wave × 240 damage each. Planes that fly into a cloud take its damage; clouds dissipate before the next wave lands. Defensive AA Fire, where fitted, multiplies the salvo repeats within each wave.

2 salvos × 4 clouds + 1 outer

Cloud damage

Damage a plane takes for flying into one flak cloud, before any reductions.

240

Cloud spawn chance

Each cloud in the pattern rolls this chance to spawn, so waves average fewer clouds than the maximum. Often called flak 'hit chance', but spawned clouds always damage planes that fly into them - the roll is on spawning.

90%

Wave rate

A flak wave spawns roughly every 2 s - timed frame-by-frame from gameplay footage and consistent across ships.

every ~2 s

Fired by

Flak keeps firing while at least one secondary battery mount is operational - even losing every other AA mount does not stop it.

Secondary battery

Flak zone

The activation band: flak fires while attacking planes are inside it. Clouds are placed ahead of the planes' path, so bursts can land short of 2.5 km or past 5.2 km - once planes get inside the band, new waves stop. AA range bonuses push the outer edge out; the 2.5 km inner edge does not move.

2.5-5.2 km

See the AA layers diagram ↓

Secondary Battery

Mounts4

Firing range5.0 km

Shell Grouping (σ)1

120 mm/50 Model 1942 (DP)

Dual-purpose: the same mounts also fire at aircraft, so they appear on the AA Defense card too - shared guns, not extra hardware.

4×2 120mm

Caliber120 mm

Reload time3 s

HE Damage1,700

Muzzle Velocity850 m/s

Fire Chance7%

Armor Pen20 mm

Secondary dispersion type

Max 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 @ 5 km

5 km × 57 + 30 = 315 m.

315 m

Maneuverability

Engine power140,000 hp

Maximum speed32.5 kt

Turning circle radius730 m

Rudder shift time11.2 s

Engine power-boost threshold7 kt

Engine spool-up time15.3 s

Reverse spool-up time7.7 s

Reverse speed

top speed / 4 + 4.9 = 32.5 / 4 + 4.9 = 13 kt. The community reverse-speed model from the WoWs ShipBuilder project, the same source as the acceleration model on this card. Base value; speed modifiers scale it. Not shown on the in-game card.

13 kt

Crash stop

Seconds from top speed to a dead stop after ordering full reverse: reverse power winds in over the reverse spool-up while water drag does most of the braking. Same community-model simulation as the acceleration times, using the ship's own reverse-power ratio from in-game data. The full curve is on the acceleration chart.

27.2 s

Engine boost threshold (reverse)

Speed below which the engine's built-in power boost applies in reverse. Matches the in-game maneuverability card's reverse threshold (Vampire II reads 10.5 here and the card shows 11; the card rounds half up).

10.8 kt

Acceleration 0-90%

Time to reach 90% of top speed (29.2 kt of 32.5 kt), from our in-house acceleration model.

26.4 s

Acceleration 0-99%

Time to reach 99% of top speed (32.2 kt of 32.5 kt). 99% rather than 100% because true top speed is asymptotic (thrust meets drag), so the last fraction of a knot is never quite gained.

43.2 s

Traverse-to-turn ratio

How many degrees the turret can swing for each degree the hull turns. Turn rate

ω_{hull} = \frac{180}{π} \cdot \frac{V_{max} (m/s)}{R_{turn}} = \frac{180}{π} \cdot \frac{32.5 \cdot 0.5144}{730} = 1.31 ° / s

, so

ratio = \frac{ω_{turret}}{ω_{hull}} = \frac{8}{1.31} = 6.1 \times

. Below 5 the turrets drag in a turning fight; 25+ keeps up with any rudder.

6.1× slow

See the full acceleration curve ↓

Concealment

Detectability by sea13.15 km

Detectability by air7.89 km

Smoke firing penalty7.6 km

Detect when firing (sea)

Equal to the ship's main battery range (never below base detectability): firing makes you visible to everyone you can reach. Matches the in-game 'Detect Firing Sea' value on all 8 unmodified captures, and range-modified captures track the modified range.

15.8 km

Detect when firing (air)

Air detectability plus the gun-firing bloom (4.06 km, which tracks main-battery caliber x 0.020). Matches the in-game 'Detect Firing Air' value on every captured ship.

11.95 km

Detect when on fire (sea)

Base sea detectability + 2.0 km while burning; matches the in-game 'Detect Fire Sea' value on every captured ship.

15.15 km

Detect when on fire (air)

Base air detectability + 3.0 km while burning; matches the in-game 'Detect Fire Air' value on every captured ship.

10.89 km

Guaranteed Detect2 km

✦

Consumables

Damage Control Party∞ charges · 60 s reload · 5 s active

Sonar2 charges · 180 s reload · 100 s active · 5 km ship detect
ƒ
Derived from the consumable's 30 m grid-unit range (km = grid units x 30 / 1000): $\frac{167 \times 30}{1000} = 5 km$
· 3.5 km torpedo detect
ƒ
Derived from the consumable's 30 m grid-unit range (km = grid units x 30 / 1000): $\frac{117 \times 30}{1000} = 3.5 km$

Defensive AA Fire3 charges · 140 s reload · 25 s active · ×2 flak burst boost
ƒ
Repeats the flak burst pattern ×2 within each wave - more clouds in the air over the wave, at the same spots.

Repair Party3 charges · 40 s reload · 28 s active · 5,614 HP (14% of max HP) total heal (per charge)
ƒ
Heal per second (0.5%) x effective active time (28 s) = up to 14% of max HP restored per charge.
· 16,842 HP (42% of max HP) total heal (all charges)
ƒ
14% per charge x 3 charges = up to 42% of max HP if the whole Repair Party loadout is used.
· 200 HP/s (0.5% of max HP) heal per second
ƒ
0.5% of max HP (40,100 HP) per second = 200 HP/s. WoWS heals a flat percent of MAX HP each second, so this rate holds at any health level.

Module options (2)

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

HullUpgrade

Hit points36,250 → 40,100
Rudder shift20.3 → 14.5 s
Close-range AA DPS72 → 106

Fire controlUpgrade

Main battery range14,360 → 15,796 m

See all derived stats

Show ▾

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

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)2

Max Horiz Disp180.7 m at 15.8 km

Horizontal dispersion ellipse width at max range, from the verified WoWS dispersion model:  $σ_{H} = (\frac{R}{30} \cdot \frac{idealRadius - minRadius}{idealDistance} + minRadius) \cdot 30$   $= (\frac{15796}{30} \cdot \frac{10 - 1.6}{1000} + 1.6) \cdot 30 = 180.7 m$

Shell scatter width @ 5 km90 m

Horizontal scatter at a fixed 5 km, from the same verified dispersion model as the rows below - a knife-fight-range anchor comparable across ships.

Shell scatter width @ 10 km132 m

How wide your shells scatter at 10 km, from the same dispersion model as the max-range figure above. Picking a fixed range makes this number directly comparable from ship to ship: max-range dispersion makes a longer-range gun look worse even when it's tighter at any common range. The interactive Dispersion tab on the Charts card plots the full curve from 0 to max range.

Shell scatter width @ 15 km174 m

Horizontal scatter at a fixed 15 km, from the same verified dispersion model - the long-range anchor. Only shown when the ship's guns reach 15 km.

Max Vert Disp108.4 m at 15.8 km

Vertical dispersion ellipse height at max range: $σ_{V} = σ_{H} \cdot radiusOnMax$ $= 180.7 \cdot 0.6 = 108.4 m$

Shell scatter height @ 10 km69.5 m

How tall the same scatter ellipse is at 10 km. Comparable from ship to ship for the same reason as the width value above. The height/width ratio is a piecewise-linear curve through three points from the ship's own dispersion data:  $radiusOnZero = 0.2$  at 0 m,  $radiusOnDelim = 0.5$  at  $delim \cdot R_{m a x} = 0.5 \cdot 15796 = 7898$  m, and  $radiusOnMax = 0.6$  at 15796 m. Above the kink:  $k = 0.5 + (0.6 - 0.5) \cdot \frac{10000 - 7898}{15796 - 7898} = 0.5266$ , so  $σ_{V} = σ_{H} \cdot k = 132 \cdot 0.5266 = 69.5 m$ .

Med Horiz Disp54.2 m at 15.8 km

50%-hit horizontal radius: $σ_{H, 50} = σ_{H} \cdot \frac{0.6}{σ}$ $= 180.7 \cdot \frac{0.6}{2} = 54.2 m$

Med Vert Disp32.5 m at 15.8 km

50%-hit vertical radius: $σ_{V, 50} = σ_{V} \cdot \frac{0.6}{σ}$ $= 108.4 \cdot \frac{0.6}{2} = 32.5 m$

Dispersion familyCruiser Disp.

Standard cruiser dispersion baseline.

AP Pen Close452.6 mm point-blank

Canonical community AP formula (jcw780/wows_shell), evaluated at muzzle velocity:  $P = 10^{- 7} \cdot K \cdot m^{0.69} \cdot d^{- 1.07} \cdot v_{0}^{1.38}$   $= 10^{- 7} \cdot 2409 \cdot 122^{0.69} \cdot {0.203}^{- 1.07} \cdot 925^{1.38} = 452.6 mm$ . Matches the in-game spec card.

AP Pen Far169.6 mm at 15.8 km

Same formula at the ship's max firing range (15.8 km), where the shell has slowed to 454.2 m/s:  $P = 10^{- 7} \cdot 2409 \cdot 122^{0.69} \cdot {0.203}^{- 1.07} \cdot {454.2}^{1.38} = 169.6 mm$ .

AP pen 5 km324 mm

AP penetration at a fixed 5 km, read off the same PC-validated ballistic curve as AP Pen Close/Far: the shell's impact velocity at that range fed through the canonical community AP formula  $P = 10^{- 7} \cdot K \cdot m^{0.69} \cdot d^{- 1.07} \cdot v^{1.38}$ . Fixed anchors make ships directly comparable at the same fighting distance; the Charts card plots the full curve.

AP pen 10 km235 mm

AP penetration at a fixed 10 km, read off the same PC-validated ballistic curve as AP Pen Close/Far: the shell's impact velocity at that range fed through the canonical community AP formula  $P = 10^{- 7} \cdot K \cdot m^{0.69} \cdot d^{- 1.07} \cdot v^{1.38}$ . Fixed anchors make ships directly comparable at the same fighting distance; the Charts card plots the full curve.

AP pen 15 km177 mm

AP penetration at a fixed 15 km, read off the same PC-validated ballistic curve as AP Pen Close/Far: the shell's impact velocity at that range fed through the canonical community AP formula  $P = 10^{- 7} \cdot K \cdot m^{0.69} \cdot d^{- 1.07} \cdot v^{1.38}$ . Fixed anchors make ships directly comparable at the same fighting distance; the Charts card plots the full curve.

HE flight time @ 10 km5.02 s

How long an HE shell takes to reach a target at a fixed 10 km, from the same numerically integrated trajectory the Charts card plots. The shell slows under quadratic air drag,  $a_{drag} = k ρ v^{2}$ , where  $ρ$  is air density from a standard-atmosphere profile and  $k$  bundles the shell's drag coefficient, caliber and mass:  $k = \frac{π C_{d} d^{2}}{8 m} = \frac{π \cdot 0.2974 \cdot {0.203}^{2}}{8 \cdot 122} = 3.94 \times 10^{- 5}$ . That runs from a 925 m/s muzzle velocity in 0.02 s steps under gravity 9.8 m/s² until the shell lands, then divides by 2.77: the game clock runs faster than real time, and that factor was measured against stopwatch runs in the Training Room. Lower is better, since a faster shell is harder to dodge and needs less lead.

AP flight time @ 10 km5.02 s

How long an AP shell takes to reach a target at a fixed 10 km, from the same numerically integrated trajectory the Charts card plots. The shell slows under quadratic air drag,  $a_{drag} = k ρ v^{2}$ , where  $ρ$  is air density from a standard-atmosphere profile and  $k$  bundles the shell's drag coefficient, caliber and mass:  $k = \frac{π C_{d} d^{2}}{8 m} = \frac{π \cdot 0.2974 \cdot {0.203}^{2}}{8 \cdot 122} = 3.94 \times 10^{- 5}$ . That runs from a 925 m/s muzzle velocity in 0.02 s steps under gravity 9.8 m/s² until the shell lands, then divides by 2.77: the game clock runs faster than real time, and that factor was measured against stopwatch runs in the Training Room. Lower is better, since a faster shell is harder to dodge and needs less lead.

HE penetration34 mm

34 mm ≈ 203 mm caliber / 6 (standard HE penetration ratio).

AP overmatch14 mm

floor(203 mm caliber / 14.3) = 14 mm (AP auto-penetrates plating this thick or less).

AP AOE Radius25

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 alpha9

All 9 barrels bear on the broadside.

Turret turn time22.5 s

180 degrees / 8 deg/s traverse speed = 22.5 s.

HE full-salvo alpha25,650

2,850 HE damage x 9 broadside guns = 25,650.

AP full-salvo alpha43,200

4,800 AP damage x 9 broadside guns = 43,200.

HE DPMInitial: 118,385 → 131,538

Zero upgrades: 25,650 HE full-salvo alpha x 60 / 13 s base reload = 118,385. All upgrades (Main Battery Mod. 3 = -10% reload): 25,650 HE full-salvo alpha x 60 / 11.7 s all-upgrades reload = 131,538.

AP DPMInitial: 199,385 → 221,538

Zero upgrades: 43,200 AP full-salvo alpha x 60 / 13 s base reload = 199,385. All upgrades (Main Battery Mod. 3 = -10% reload): 43,200 AP full-salvo alpha x 60 / 11.7 s all-upgrades reload = 221,538.

Shells/minInitial: 41.5 → 46.2

Zero upgrades: 9 broadside guns x 60 / 13 s base reload = 41.5. All upgrades (Main Battery Mod. 3 = -10% reload): 9 broadside guns x 60 / 11.7 s all-upgrades reload = 46.2.

Fires/minInitial: 5.4 → 6

Zero upgrades: 41.5 shells/min x 13% fire chance = 5.4. All upgrades (Main Battery Mod. 3 = -10% reload): 46.2 shells/min x 13% fire chance = 6.

AA defense

AA DPS at max range110

Only families that reach 5.2 km contribute at the outer edge of the AA bubble. In-game families: 40mm Bofors M36 10x2 -> 170 DPS @ 3.5 km; 20mm Oerlikon MK20 Twin 14x2 -> 155 DPS @ 2 km; 120 50 Bofors M42 4x2 -> 110 DPS @ 5.2 km.

Maximum AA range5.2 km

Longest-reaching family on the in-game AA card. Base AirDefense aura max range is 3.5 km; dual-purpose mount auras extend it.

AA DPS layered by range110 DPS @ 5.2 km, 280 DPS @ 3.5 km, 435 DPS @ 2 km

Cumulative AA DPS at each family range threshold. Inner ranges stack the outer families, so a target closing the distance hits stronger AA bubbles as it crosses each band.

AA DPS at point-blank435

Sum of every family's average DPS, achievable only inside the closest-range family (2 km).

AA threat index1477

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 range2 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 @ 5 km315 m

5 km × 57 + 30 = 315 m.

Secondary battery firepower

Secondary DPM (per side)136,000

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: 4×2 120 mm (4/side) × 60/3 × 1700 = 136,000. Assumes every shell hits (real hit rate is lower; the Brawl matchup tool on the Compare page folds in dispersion + target armor).

Max HE alpha1700

Maximum HE damage per shell across secondary HE families. Best on this ship: 1700 from the 120 mm family.

Max HE fire chance7%

Maximum per-shell fire chance across secondary HE families (before target fire resistance is applied). Best on this ship: 7% from the 120 mm family.

Max HE pen20 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: 20 mm from the 120 mm family.

Armor Beta

Hull HP 36,250 → 40,100 with hull upgrade, 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.

Bow & stern25 mm

Overmatched by 102+ AP guns across the bracket. Can’t reliably bow-tank; gets bow-citadelled and overpenned.

Belt / citadel200 mm

AP can citadel a flat broadside even at range. Stay angled and avoid showing the full side.

Farming16 mm

Superstructure and extremities take HE pens and AP overpens from nearly any gun: steady chip damage. Fire resistance 37%, fires burn 30s. Range-by-range in the Compare tool →

Section	Plates	HP cap	Threats	Tactic
Bow	25 mm primary (range 25–40 mm)	2,200 (5% of HP)	Overmatched by 380mm+ AP (Gneisenau, Richelieu)Angle bounces 356mm25 mm: HE pens from 150mm+	Bow-tank fits behind this exterior plate. Saturation is FAST here; the cap is often only a few thousand HP.
Hull (midship)	16 mm primary (range 16–200 mm)	30,100 (75% of HP)	Overmatched by 283mm+ AP (Scharnhorst, Scharnhorst '43)Angle bounces 203mm16 mm: HE pens from 127mm+	Largest HP pool. Citadel sits behind these plates; thinner deck and side plating absorb the rest.
Stern	25 mm primary (range 25–90 mm)	1,800 (4% of HP)	Overmatched by 380mm+ AP (Gneisenau, Richelieu)Angle bounces 356mm25 mm: HE pens from 150mm+	Mirror of bow. Same fast saturation.
Citadel	200 mm primary (range 40–200 mm)	≈ 165,500 (effectively no cap)	Citadel pen: full damageOver-pen: ×0.10 damage	Effectively no cap; citadel pool sits at ~165k HP on every ship. An AP citadel penetration deals the shell's full damage, the biggest single hit available; only over-penetrations are damped, to ×0.10.
Superstructure	16 mm primary (range 16–100 mm)	1,900 (5% 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 HP	20,100 magazine HP	Turret knocked out	Per-turret powder-magazine HP, a separate pool that does not drain ship HP. As it is worn down the turret is likelier to be knocked out, and a smaller pool gets there faster.
Secondary mount (120 mm mount)	separate HP pool, does not drain ship HP	1,200 per-mount HP	Destroyed at 0 HP	Per-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 (40 mm mount)	separate HP pool, does not drain ship HP	200 per-mount HP	Destroyed at 0 HP	Per-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 HP	12,000 module HP	Incapacitated at 0 HP	When 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.

Open in Charting Tool

Ship Charts

Balance History

Balance updates affecting Haarlem. Cards are condensed; use each source link for full context.

Nerf ×7Buff ×2Rework ×1Commander Skill ×1Airstrike ×5

2026-06-25

Ministry of Balance: Skillful Adjustments

Detectability range by sea increased from 11.84 to 13.15 km.
Detectability range by air increased from 7.1 to 7.89 km.
Detectability range while firing in smoke increased from 6.63 to 7.6 km.
Replaced the "Hidden" trait with "Pyromania".

Read the full official post

2026-04-30

Ministry of Balance: Viva la Marina!

Nerf affecting Dutch cruisers above Tier IV: Air Support special-effect activation distance reduced from 7.5/8/8.5/9 km to 7/7.4/7.7/8 km.

Read the full official post

2025-10-30

Ministry of Balance: Preparing for Winter

Stock and upgraded Airstrike accuracy reduced: percentage of bombs falling near the central aim point decreased from 66% to 50%.

Read the full official post

2025-10-30

November Update: Into Black Waters

Armor.

Read the full official post

2025-06-26

Ministry of Balance: Declaration of Changes

Stock Airstrike maximum bomb damage reduced from 5,150 to 5,000.
Stock Airstrike squadron restoration time increased from 90 to 100 seconds.
Upgraded Airstrike maximum bomb damage reduced from 5,800 to 5,300.
Upgraded Airstrike squadron restoration time increased from 90 to 100 seconds.

Read the full official post

Exteriors

Skins & permanent camouflages

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

DefaultThe ship’s standard exterior

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.

2025-02-27 · Patch notes March Update: Thirst for Combat Patch notes 2025-04-03 · Patch notes April Update: The Bonds of Loyalty Patch notes 2025-06-26 · Patch notes July Update: Of Stars and Freedom Patch notes 2025-10-30 · Patch notes November Update: Into Black Waters Patch notes 2026-06-25 · Patch notes July Update: Born to Sail Free Patch notes

Haarlem

Haarlem Community Stats

Haarlem Community Stats

Playstyle

Overview

Positioning

Potato Avoidance

Signature Traits →

How to get Haarlem

Best listed chance for this ship

Builds

Karel Doorman

Karel Doorman

Cohort position

Peers in this cohort

Stats & specs

See all derived stats

Main battery formulas

AA defense

Secondary battery dispersion

Secondary battery firepower

Armor Beta

Ship Charts

Balance History

Ministry of Balance: Skillful Adjustments

Ministry of Balance: Viva la Marina!

Ministry of Balance: Preparing for Winter

November Update: Into Black Waters

Ministry of Balance: Declaration of Changes

Skins & permanent camouflages

Primary official WG sources

Signature Traits