GamingDiver / WoWs Legends Ships / Perfect 10

World of Warships: Legends ship guide

Perfect 10

Also called: 完美10号 · Идеальная 10 · 퍼펙트 10 · Perfekte 10 · 10 sur 10 Beta

U.K. · Tier VII · CL Cruiser · Premium · Plymouth Variant

AP-only cruiserNo HE shells: every salvo is AP into broadsides, dodge in open water.

Playstyle

Sit 12-15 km on a flank that gives you firing arcs into rotated cruisers and exposed BB broadsides
Avoid: Passing up destroyer shots because the AP over-pens

Key characteristics

2.05 sigma accuracyHigh AP DPMWide always-pen zoneLobs over islandsExhaust SmokeSlow heal cycle

On this page

Community stats
Playstyle
How to get Perfect 10
Builds
Cohort position
Stats and specs
Armor
Charts
Balance history
Exteriors

Community Data

Perfect 10 Community Stats

Log in to GamingDiver and upload your data to see Community Data for Perfect 10: community win rate, damage, survival, spotting, and your own comparison.

Playstyle

Overview

Perfect 10 is a Tier VII British AP-only cruiser with strong AP DPM (426,667): she carries no HE shells at all, so every salvo is AP into broadsides or wasted. The hull is fragile, so the kit is fragile-spammer chasing soft targets and dodging in open water rather than trading punches. Sonar (4.9 km on ships and 3.4 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 AP always-pen window in T7 CAs (60°) and best AP guaranteed-ricochet angle in T7 CAs (75°).

Positioning

Sit 12-15 km on a flank that gives you firing arcs into rotated cruisers and exposed BB broadsides. The hull is fragile; ration trades to ones that pay AP citadels back, and lean on speed and consumables to dodge focus when it comes. Open water is fine when the closest threat is far enough that the salvo timing favors you. Your AP loses penetration at range, so aim at superstructures or pen-able hull armor, not the bow-in or belt armor it bounces and shatters on. Shooting from the cloud gives you away at 6.3 km, and a destroyer here is spotted at about 7 km, so you see it coming with roughly 0.61 km to spare. Vision is mutual: past the 2 km guaranteed ring you cannot see out either, and only your Sonar bubble (4.9 km) sees out; past that you are shooting at what a teammate holds lit. Enemy sonar (about 4.4 km) and radar (about 9.5 km) read straight in regardless. At 600 m the screen is wider than standard, so it can cover a teammate holding the same line as well as your own hull. Once the rudder is over she turns tightly for her cohort (680 m), so a committed turn costs less water than most of what she is fighting.

Potato Avoidance

Passing up destroyer shots because the AP over-pens

Even an over-pen is guaranteed chip damage that wears a DD down and denies its caps and torpedo runs, so keep guns on any destroyer you can see. Save the citadel salvos for broadside cruisers and BB sides, but never hold fire on a spotted DD. A skipped salvo is 6.3 s of nothing, and over-pens you did take would have been damage the destroyer cannot heal back.

Signature Traits

Engine Boost

+20% speed (about +7.2 kt), 180 s duration. Engine Boost consumable temporarily raises top speed. Mobility on demand to reposition, chase a kill, or break contact. Uncommon in T7 CAs.

Long smoke deployment ↗

30 s smoke deployment window, best of the 20 T7 CAs with smoke. Lays a longer rolling smoke trail while moving.

ELITE MAIN BATTERY ↗

Wide always-pen zone · 60°
Late auto-bounce · 75°

ELITE REPAIR PARTY ↗

Extra heal charges · 3 Repair
Repairs citadel hits · 50%

Thick deck armor ↗

76 mm armor deck, top decile of T7 CAs. Eats plunging fire and HE that peers don't.

Slow heal cycle ↗

80 s Repair Party reload, worst of T7 CAs. Heals come off cooldown slower than peers.

Acquisition

How to get Perfect 10

Perfect 10 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.

ContainersAppears in official container odds below; availability depends on the container being sold or awarded.

Best listed chance for this ship

Racing Legends crate 1% VII Perfect 10 Event · Racing Legends crate
Piñata Chest 0.166667% Tier V, VI, or VII Premium ship Event · Piñata Chest · 1 of 18 ships
Explorer's Chest 0.115385% One of these ships New · Explorer's Chest · 1 of 26 ships

Official WG availability sources

Official WoWS Legends container odds Containers Official container drop rows linked below include direct and nested effective ship odds.

Show direct source rows

Explorer's Chest 0.115385% · One of these ships
Piñata Chest 0.166667% · Tier V, VI, or VII Premium ship
Racing Legends crate 1% · VII Perfect 10

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.

Open in Build Tool →

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

Cohort position

Hide ▾

Where Perfect 10 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 arming threshold12 mm (1 of 5 tied) BestAP ricochet start60° (1 of 14 tied) BestAP auto-bounce angle75° (1 of 6 tied) BestRepair charges3 (1 of 6 tied) Top 10%Max speed36 kt (4/57) Top 10%AP DPM426,667 (5/57) Top 10%Secondary DPM (per side)180,000 (5/50) Top 10%Acceleration16.2 s (4/56) Top 10%Turn speed retained86.7% (4/57) Top 10%Torpedo speed70 kt (4/42) Top 10%Deck armor76 mm (5/52) Top 25%Turning circle680 m (13/57) Top 25%Main battery reload6.3 s (15/57) Top 25%Sigma2.05 (7/57) Top 25%Main dispersion137.8 m (9/57) Top 25%Torpedo reaction time6.9 s (7/42) Top 25%Torpedo reload85 s (10/42) Bottom 25%Main battery range15.19 km (51/57) Bottom 25%Secondary HE pen17 mm (39/50) Bottom 25%Engine power84,000 hp (46/56) Bottom 25%Turn-speed retention123.5 hp/m (44/56) Bottom 25%Power-to-weight5.4 hp/t (49/56) Bottom 25%AP pen at 10 km130 mm (45/57) Bottom 25%Max armor114 mm (47/57) WorstAP fuse timer0.01 s (1 of 3 tied) WorstRepair heal rate0.5 %/s (1 of 18 tied) WorstEnd plates16 mm (1 of 8 tied / 1 of 8 tied)

See 20 mid-pack stats

Not standouts for Perfect 10 -- 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 points36,500 HP(42/57) Concealment12.5 km(26/57) Smoke fire bloom6.34 km(19/57) Air detection7.65 km(35/57) Rudder shift8.1 s(21/57) Traverse-to-turn ratio6.41 ×(21/57) Main battery caliber152 mm(41/57) Secondary HE alpha1,500(27/50) Secondary fire chance6%(19/50) AP velocity882 m/s(27/57) Displacement15,548 t(29/57) AA DPS436(17/57) AA range5 km(29/57) AA threat1,294(35/57) Flak per wave (expected)1,197(41/57) Torpedo range9 km(23/42) Torpedo damage≈15,667(13/42) Citadel belt114 mm(39/54) NormSecondary dispersion bracket57(47 of 50 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 Points36,500

Displacement15,548 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.

190.6 x 20.73 m

Armor range13–114 mm

Plate armor thicknesses13, 16, 19, 25, 32, 37, 40, 51, 63, 64, 76, 114 mm

Armor material/layer entries47

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.

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 (3,285 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 (3,650 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.

21%

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.

18,300

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.

11,000

Effective HP

Base 36,500 HP plus everything Repair Party can restore: 0.5%/s x 28 s = 5,110 HP per charge, x3 charges = 15,330 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.

51,830

Repairable: penetration60%

Repairable: citadel50%

Repairable: steering gear50%

Main Battery

ModuleArtillery: 152 mm/50 BL Mk XXIII

Mounts / barrels4 mounts / 16 barrels

Reload time7 s

Firing range15.2 km

Turret traverse10 °/s

Turret armor102 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 ±133°, 2x ±136°

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.

44° off bow / 47° off stern

See the firing-arcs diagram ↓

AP pen max range90 mm

Shell Grouping (σ)2.05

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{15193}{30} \cdot \frac{8 - 1.1}{1000} + 1.1) \cdot 30 = 137.8 m

137.8 m at 15.2 km

Max Vert Disp

Vertical dispersion ellipse height at max range:

σ_{V} = σ_{H} \cdot radiusOnMax

= 137.8 \cdot 0.6 = 82.7 m

82.7 m at 15.2 km

Med Horiz Disp

50%-hit horizontal radius:

σ_{H, 50} = σ_{H} \cdot \frac{0.6}{σ}

= 137.8 \cdot \frac{0.6}{2.05} = 40.3 m

40.3 m at 15.2 km

Med Vert Disp

50%-hit vertical radius:

σ_{V, 50} = σ_{V} \cdot \frac{0.6}{σ}

= 82.7 \cdot \frac{0.6}{2.05} = 24.2 m

24.2 m at 15.2 km

Turret turn time

180 degrees / 10 deg/s traverse speed = 18 s.

18 s

Shells/min

Zero upgrades: 16 broadside guns x 60 / 7 s base reload = 137.1. All upgrades (Main Battery Mod. 3 = -10% reload): 16 broadside guns x 60 / 6.3 s all-upgrades reload = 152.4.

Initial: 137.1 → 152.4

AP shells

AP Damage2,800

AP Velocity882 m/s

Min Ricochet60 deg

Guaranteed Ricochet75 deg

Fuse Timer0.005 s

Fuse Threshold12 mm

AP overmatch

floor(152 mm caliber / 14.3) = 10 mm (AP auto-penetrates plating this thick or less).

10 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 2609 \cdot {50.8}^{0.69} \cdot {0.152}^{- 1.07} \cdot 882^{1.38} = 341.7 mm

. Matches the in-game spec card.

341.7 mm point-blank

AP Pen Far

Same formula at the ship's max firing range (15.2 km), where the shell has slowed to 334 m/s:

P = 10^{- 7} \cdot 2609 \cdot {50.8}^{0.69} \cdot {0.152}^{- 1.07} \cdot 334^{1.38} = 89.5 mm

89.5 mm at 15.2 km

AP full-salvo alpha

2,800 AP damage x 16 broadside guns = 44,800.

44,800

AP DPM

Zero upgrades: 44,800 AP full-salvo alpha x 60 / 7 s base reload = 384,000. All upgrades (Main Battery Mod. 3 = -10% reload): 44,800 AP full-salvo alpha x 60 / 6.3 s all-upgrades reload = 426,667.

Initial: 384,000 → 426,667

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.

Torpedoes

ModuleTorpedoes: 533 mm QR Mk II

Launchers / tubes2 launchers × 4 tubes = 8 tubes

Reload time85 s

Projectile speed70 kt

Range9 km

Maximum simulated damage

Estimate of WG's in-game value; matches the in-game port screen within ±5%. Saturation: most targets only intersect one hull section, so the sim transfers ~1/3 of the warhead alpha (2/3 when the warhead blast >= 5000 and the burst reaches a second section). For this ship:

D_{sim} = α \cdot c = 47, 000 \cdot 0.333 = 15, 667

≈ 15,667

Maximum damage (ammunition)

The ammunition card's 'Maximum Damage' stat, exact: warhead alpha / 3 plus the blast addend. This is the per-torpedo number most references quote; the 'Maximum simulated damage' row above is WG's separate geometry-sim stat from the launcher spec panel.

16,767

Torpedo detectability1.3 km

Reaction time

How long a target has to dodge after your torpedo is spotted at its detectability range (lower means less warning):

t_{react} = \frac{1.3 km}{70 kt \times 2.6855} = 6.9 s

. The 2.6855 m/s-per-knot game-speed factor is calibrated from in-game measurement; the community's traditional 2.6 reads about 3% slower. Base value; commander torpedo-concealment skills lower it further. Community torpedo-reaction calculator by u/LorenDovah and u/The_ColorOutofSpace.

6.9 s

Flooding chance

Read straight from the game's own data: this torpedo carries a flooding-chance value of 2.82 per hit, shown as

2.82 \times 100 = 282 %

. Torpedo flood values above 100% are normal: in battle the base chance is scaled down by the target's torpedo protection (the Torp Reduction stat on its Survivability card) and any flood-resistance modifiers, so a value above 100% keeps flooding likely even through partial protection. Not shown on the in-game port screen.

282%

Torpedo launcher traverse25 °/s

Launch arcs145° per side

Torp Turn

Time to rotate the launchers 180 deg:

t_{turn} = \frac{180 °}{25 ° / s} = 7.2 s

7.2 s

Torp Arming218 m

Per-side salvo damage

One side firing, all torpedoes hitting: per-side tubes x per-torpedo simulated damage = 4 x 15,667 = 62,668.

62,668

AA Defense

AA mount points26

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 km

40 mm Bofors Mk VII8×1 40mm

40 mm/39 QF Mark VII6×4 40mm

20 mm Oerlikon Mk V12×2 20mm

102 mm/45 QF Mk XIX (DP)

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

6×2 102mm

Guns102 mm/45 QF Mk XIX (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 63 from dual-purpose secondaries firing as AA in this range band.

Range5 km

Guns40 mm Bofors Mk VII

Continuous DPS

Effective DPS: 36 raw aura damage × 3.5 × 0.9 hit probability = 113 - the same in-game units as the Close-range AA DPS headline.

113

Range3.5 km

Total DPS in Aura

Far 63 + Outer Medium 113 = 176

176

Guns40 mm/39 QF Mark VII

Continuous DPS

Effective DPS: 40 raw aura damage × 3.5 × 0.9 hit probability = 126 - the same in-game units as the Close-range AA DPS headline.

126

Range2.5 km

Total DPS in Aura

Far 63 + Outer Medium 113 + Inner Medium 126 = 302

302

Guns20 mm Oerlikon Mk V

Continuous DPS

Effective DPS: 45 raw aura damage × 3.5 × 0.85 hit probability = 134 - the same in-game units as the Close-range AA DPS headline.

134

Range2 km

Total DPS in Aura

Far 63 + Outer Medium 113 + Inner Medium 126 + Near 134 = 436

436

Bursts

Each ~2 s wave fires 2 quick salvos of 3 clouds ahead of the attacking squadron, plus 1 stray cloud farther out that appear off-beat between waves - up to 7 clouds per wave × 190 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 × 3 clouds + 1 outer

Cloud damage

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

190

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 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 km

See the AA layers diagram ↓

Secondary Battery

Mounts6

Firing range5.0 km

Shell Grouping (σ)1

102 mm/45 QF Mk XIX (DP)

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

6×2 102mm

Caliber102 mm

Reload time3 s

HE Damage1,500

Muzzle Velocity811 m/s

Fire Chance6%

Armor Pen17 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 power84,000 hp

Maximum speed36 kt

Turning circle radius680 m

Rudder shift time8.1 s

Engine power-boost threshold31.2 kt

Engine spool-up time15.3 s

Reverse spool-up time7.7 s

Reverse speed

top speed / 4 + 4.9 = 36 / 4 + 4.9 = 13.9 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.

13.9 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.

33.3 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).

9.4 kt

Acceleration 0-90%

Time to reach 90% of top speed (32.4 kt of 36 kt), from our in-house acceleration model.

16.2 s

Acceleration 0-99%

Time to reach 99% of top speed (35.6 kt of 36 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.

37 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{36.0 \cdot 0.5144}{680} = 1.56 ° / s

, so

ratio = \frac{ω_{turret}}{ω_{hull}} = \frac{10}{1.56} = 6.4 \times

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

6.4× slow

See the full acceleration curve ↓

Concealment

Detectability by sea12.5 km

Detectability by air7.65 km

Smoke firing penalty6.34 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.

15.19 km

Detect when firing (air)

Air detectability plus the gun-firing bloom (3.04 km, which tracks main-battery caliber x 0.020). Matches the in-game 'Detect Firing Air' value on every captured ship.

10.69 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.

14.5 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.

10.65 km

Guaranteed Detect2 km

✦

Consumables

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

Repair Party3 charges · 80 s reload · 28 s active · 5,110 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.
· 15,330 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.
· 182 HP/s (0.5% of max HP) heal per second
ƒ
0.5% of max HP (36,500 HP) per second = 182 HP/s. WoWS heals a flat percent of MAX HP each second, so this rate holds at any health level.

Choose one

Engine Boost2 charges · 120 s reload · 180 s active · +20% speed bonus

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.

Choose one

Exhaust Smoke Generator2 charges · 180 s reload · 30 s emit / 45 s cloud active · 600 m radius

Sonar2 charges · 180 s reload · 100 s active · 4.92 km ship detect
ƒ
Derived from the consumable's 30 m grid-unit range (km = grid units x 30 / 1000): $\frac{164 \times 30}{1000} = 4.92 km$
· 3.42 km torpedo detect
ƒ
Derived from the consumable's 30 m grid-unit range (km = grid units x 30 / 1000): $\frac{114 \times 30}{1000} = 3.42 km$

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)2.05

Max Horiz Disp137.8 m at 15.2 km

Horizontal dispersion ellipse width at max range, from the verified WoWS dispersion model:  $σ_{H} = (\frac{R}{30} \cdot \frac{idealRadius - minRadius}{idealDistance} + minRadius) \cdot 30$   $= (\frac{15193}{30} \cdot \frac{8 - 1.1}{1000} + 1.1) \cdot 30 = 137.8 m$

Shell scatter width @ 5 km67.5 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 km102 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 km136.5 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 Disp82.7 m at 15.2 km

Vertical dispersion ellipse height at max range: $σ_{V} = σ_{H} \cdot radiusOnMax$ $= 137.8 \cdot 0.6 = 82.7 m$

Shell scatter height @ 10 km54.2 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  $delim \cdot R_{m a x} = 0.5 \cdot 15193 = 7596$  m, and  $radiusOnMax = 0.6$  at 15193 m. Above the kink:  $k = 0.5 + (0.6 - 0.5) \cdot \frac{10000 - 7596}{15193 - 7596} = 0.5316$ , so  $σ_{V} = σ_{H} \cdot k = 102 \cdot 0.5316 = 54.2 m$ .

Med Horiz Disp40.3 m at 15.2 km

50%-hit horizontal radius: $σ_{H, 50} = σ_{H} \cdot \frac{0.6}{σ}$ $= 137.8 \cdot \frac{0.6}{2.05} = 40.3 m$

Med Vert Disp24.2 m at 15.2 km

50%-hit vertical radius: $σ_{V, 50} = σ_{V} \cdot \frac{0.6}{σ}$ $= 82.7 \cdot \frac{0.6}{2.05} = 24.2 m$

AP Pen Close341.7 mm point-blank

Canonical community AP formula (jcw780/wows_shell), evaluated at muzzle velocity:  $P = 10^{- 7} \cdot K \cdot m^{0.69} \cdot d^{- 1.07} \cdot v_{0}^{1.38}$   $= 10^{- 7} \cdot 2609 \cdot {50.8}^{0.69} \cdot {0.152}^{- 1.07} \cdot 882^{1.38} = 341.7 mm$ . Matches the in-game spec card.

AP Pen Far89.5 mm at 15.2 km

Same formula at the ship's max firing range (15.2 km), where the shell has slowed to 334 m/s:  $P = 10^{- 7} \cdot 2609 \cdot {50.8}^{0.69} \cdot {0.152}^{- 1.07} \cdot 334^{1.38} = 89.5 mm$ .

AP pen 5 km208 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 km130 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 km91 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.

AP flight time @ 10 km5.99 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:  $k = \frac{π C_{d} d^{2}}{8 m} = \frac{π \cdot 0.3297 \cdot {0.152}^{2}}{8 \cdot 50.8} = 5.89 \times 10^{- 5}$ . That runs from a 882 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 overmatch10 mm

floor(152 mm caliber / 14.3) = 10 mm (AP auto-penetrates plating this thick or less).

AP AOE Radius20

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 alpha16

All 16 barrels bear on the broadside.

Turret turn time18 s

180 degrees / 10 deg/s traverse speed = 18 s.

AP full-salvo alpha44,800

2,800 AP damage x 16 broadside guns = 44,800.

AP DPMInitial: 384,000 → 426,667

Zero upgrades: 44,800 AP full-salvo alpha x 60 / 7 s base reload = 384,000. All upgrades (Main Battery Mod. 3 = -10% reload): 44,800 AP full-salvo alpha x 60 / 6.3 s all-upgrades reload = 426,667.

Shells/minInitial: 137.1 → 152.4

Zero upgrades: 16 broadside guns x 60 / 7 s base reload = 137.1. All upgrades (Main Battery Mod. 3 = -10% reload): 16 broadside guns x 60 / 6.3 s all-upgrades reload = 152.4.

Torpedoes

Torpedo detectability1.3 km

Estimated torpedo reaction time6.9 s

detectability / (speed kt x 2.6855 game-speed factor, m/s per knot, calibrated from in-game measurement; the community's traditional 2.6 reads about 3% slower).

Torpedo speed70 kt

Travel time to max range47.9 s

range / (speed kt x 2.6855 game-speed factor, m/s per knot, calibrated from in-game measurement).

Torpedo module damage1,100

Per-torpedo module/blast damage parameter from in-game data. Most torpedoes carry 500 to 2,000; ships announced by WG as dealing increased module damage carry 9,000 to 12,000, so their hits knock out engines, rudders, and turrets far more often. Comparative figure; the exact module-HP conversion is not published.

Tube count8

2 launchers x 4 tubes.

Per-side salvo4 torpedoes

tube count / 2 (symmetric port/starboard launcher layout; common on cruisers and battleships with deck torpedoes).

Full-salvo damage125,336

All tubes hitting one target: tubes x per-torpedo simulated damage = 8 x 15,667 = 125,336.

Per-side salvo damage62,668

One side firing, all torpedoes hitting: per-side tubes x per-torpedo simulated damage = 4 x 15,667 = 62,668.

AA defense

AA DPS at max range63

Only families that reach 5 km contribute at the outer edge of the AA bubble. In-game families: 2 pdr MkVII Quad 6x4 -> 126 DPS @ 2.5 km; 40mm Bofors Mark VII single 8x1 -> 113 DPS @ 3.5 km; 20mm Oerlikon MK V 12x2 -> 134 DPS @ 2 km; 4in45 QF Mk XIX 6x2 -> 63 DPS @ 5 km.

Maximum AA range5 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 range63 DPS @ 5 km, 176 DPS @ 3.5 km, 302 DPS @ 2.5 km, 436 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-blank436

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

AA threat index1294

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)180,000

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: 6×2 102 mm (6/side) × 60/3 × 1500 = 180,000. Assumes every shell hits (real hit rate is lower; the Brawl matchup tool on the Compare page folds in dispersion + target armor).

Max HE alpha1500

Maximum HE damage per shell across secondary HE families. Best on this ship: 1500 from the 102 mm family.

Max HE fire chance6%

Maximum per-shell fire chance across secondary HE families (before target fire resistance is applied). Best on this ship: 6% from the 102 mm family.

Max HE pen17 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: 17 mm from the 102 mm family.

Armor Beta

Hull HP 36,500, distributed across 5 hull zones, each with its own plate thicknesses, saturation cap, and pen thresholds. HP caps are estimated from the standard WoWs damage-allocation model.

Bow & stern16 mm

Overmatched by 141+ AP guns across the bracket. Can’t reliably bow-tank; gets bow-citadelled and overpenned.

Belt / citadel114 mm

Thin belt: battleship AP citadels straight through it broadside. Rely on angle, speed and concealment, never sit flat.

Farming13 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	16 mm primary (range 16–40 mm)	≈ 1,825 (~5% of HP)	Overmatched by 283mm+ AP (Scharnhorst, Scharnhorst '43)Angle bounces 203mm16 mm: HE pens from 127mm+	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 16–63 mm)	≈ 27,375 (~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	16 mm primary (range 16–40 mm)	≈ 1,825 (~5% of HP)	Overmatched by 283mm+ AP (Scharnhorst, Scharnhorst '43)Angle bounces 203mm16 mm: HE pens from 127mm+	Mirror of bow. Same fast saturation.
Citadel	114 mm primary (range 16–114 mm)	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	13 mm primary (range 13–114 mm)	no cap	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).

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 Perfect 10. Cards are condensed; use each source link for full context.

Nerf ×1Buff ×8Rework ×1Main Battery ×3Torpedo ×2

2025-10-30

Ministry of Balance: Preparing for Winter

Slightly changed the geometry of the main guns.

Read the full official post

2024-10-10

Ministry of Balance: Trick and Treat

Main battery reload time reduced from 7.5 to 7.0 s.
AP shell speed increased from 841 to 882 m/s.
Detectability range by sea reduced from 13.25 to 12.5 km.
Detectability range by air reduced from 7.95 to 7.65 km.
Detectability range while firing in smoke reduced from 6.67 to 6.34 km.
Torpedo reload time reduced from 96.0 to 85.0 s.
Torpedo speed increased from 67.0 to 70.0 kts.
Torpedo range reduced from 10 to 9 km.
Engine Boost effect on maximum speed increased from +15% to +20%.

Read the full official post

Exteriors

Skins & permanent camouflages

Every custom exterior Perfect 10 can equip, from in-game data.

DefaultThe ship’s standard exterior
Decorative
Plymouth RaceDecorative

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.

2023-03-18 · Official ship feature / stats Racing Legends: Part 2 Official source 2024-10-28 · Official ship feature / stats Full Acceleration: Racing Legends Content Is Back! Official source 2024-10-10 · Patch notes Halloween Update: Crimson Tale Patch notes

Perfect 10

Perfect 10 Community Stats

Perfect 10 Community Stats

Playstyle

Overview

Positioning

Potato Avoidance

Signature Traits →

How to get Perfect 10

Best listed chance for this ship

Builds

Cohort position

Peers in this cohort

Stats & specs

See all derived stats

Main battery formulas

Torpedoes

AA defense

Secondary battery dispersion

Secondary battery firepower

Armor Beta

Ship Charts

Balance History

Ministry of Balance: Preparing for Winter

Ministry of Balance: Trick and Treat

Skins & permanent camouflages

Primary official WG sources

Signature Traits