GamingDiver / WoWs Legends Ships / Napoli B

World of Warships: Legends ship guide

Napoli B

Also called: 那不勒斯 B Beta

Italy · Tier ★ · CB Cruiser · Premium · Napoli Variant

All-rounder cruiserNo glaring weakness: pick AP, HE, or cap support to fit the team and the map.

Playstyle

Hold 12-15 km angles with islands close enough to break line of sight when focus comes
The AP kit pays best when you choose your salvo target, not when you chase one
Avoid: Pressing the secondary booster before you have somewhere to be

Key characteristics

Long torps (14 km)2.15 sigma accuracyStrong secondaries (6 km)Stealthy (11.5 km)Exhaust SmokeLow AP DPM

On this page

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

Community Data

Napoli B Community Stats

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

Playstyle

Overview

Napoli B is a Legendary Italian all-rounder heavy cruiser with 254mm guns at 15.5 km: no single dominant trait, but competent at AP citadels, HE pressure, and cap support. Adapt to the team comp - DD hunter, BB chip, or cap contester - rather than locking into one role. Her secondary battery fires SAP rather than HE, so it punches through angled plating that shatters standard secondaries in a brawl. Standout traits: best armor plate in Legendary CAs (330 mm) and best flat arc HE shells in Legendary CAs (954).

Positioning

Hold 12-15 km angles with islands close enough to break line of sight when focus comes; pick broadsides as they rotate rather than baiting them. The AP kit pays best when you choose your salvo target, not when you chase one. Shooting from the cloud gives you away at 7.6 km, wider than a destroyer's own concealment here (about 7.1 km), so one can watch you shoot for 0.46 km before you know it is there, with the smoke holding you broadside and stopped. Treat it as cover to leave from, not a firing position. Vision is mutual: past the 2 km guaranteed ring you cannot see out either, and nothing in her kit sees through it, so you would be blind as well as stopped. Enemy sonar (about 4.9 km) and radar (about 9.9 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.

Potato Avoidance

Pressing the secondary booster before you have somewhere to be

It is a beacon: everything inside secondary range now knows exactly where you are, and the ships already shooting at you do not stop. Pick the position before you press it, not after. Keeping every secondary in the fight also means showing more of the ship than you want to, so the price of full secondary coverage is an exposed broadside.

Signature Traits

Thickest plate ↗

330 mm on her single heaviest plate, best of Legendary CAs. Its thickest plate is beyond any HE or AP overmatch in the game, though that is one belt rather than the ship as a whole.

Flat arc HE shells ↗

954 m/s HE muzzle velocity, best of Legendary CAs. Flatter trajectory, easier to land at range.

Heavy secondary DPM ↗

417500 secondary DPM per side, best of Legendary CAs. Per-side barrels × shots/min × alpha across every secondary family; real damage scales with hit rate against the target.

ELITE MOBILITY ↗

Holds speed in turns · 320 hp
Heavy powerplant · 240000 hp

Low AP DPM ↗

217059 AP DPM, bottom decile of Legendary CAs. Citadel windows matter more than spam.

Short AA reach ↗

4 km AA reach, bottom decile of Legendary CAs. Bombs and torpedoes drop before AA bites.

Acquisition

How to get Napoli B

Napoli B 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

Black Friday '23 crate 0.25% ⭐ Napoli B Event · Black Friday '23 crate
Piñata Chest 0.2% Tier VIII Premium ship or Legendary Tier ship Event · Piñata Chest · 1 of 5 ships
Explorer's Chest 0.090909% One of these ships New · Explorer's Chest · 1 of 11 ships

Show all 5 containers (2 more)

Champion's Box 0.05% ⭐ Napoli B Archived · Champion's Box → Black Friday '23 crate
Black Friday Ultimate Crate 0.04175% ⭐ Napoli B Event · Black Friday Ultimate Crate → Black Friday '23 crate

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

Black Friday '23 crate 0.25% · ⭐ Napoli B
Explorer's Chest 0.090909% · One of these ships
Piñata Chest 0.2% · Tier VIII Premium ship or Legendary Tier ship

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 Napoli B sits among Legendary CAs (21 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.

BestStealth profile11.54 km / 6.92 km (1/21 / 1/21) BestSecondary dispersion bracket21 (1/14) BestSecondary DPM (per side)417,500 (1/14) BestHE velocity954 m/s (1 of 2 tied) BestTurn-speed retention320 hp/m (1/21) BestMax armor330 mm (1 of 3 tied) Top 10%Max speed35.5 kt (3/21) Top 10%Sigma2.15 (3/21) Top 10%AP velocity945 m/s (3/21) Top 10%Engine power240,000 hp (3/21) Top 10%Secondary range6 km (2/14) Top 25%Turning circle750 m (6/21) Top 25%Power-to-weight8.92 hp/t (6/21) Top 25%Torpedo range13.5 km (3/13) Top 25%Torpedo reaction time7.3 s (3/13) Bottom 25%HE DPM121,765 (18/19) Bottom 25%Effective HE DPM (incl. fire)168,079 (18/19) Bottom 25%AA DPS478 (17/21) Bottom 25%Torpedo damage≈12,900 (11/13) Bottom 10%AP DPM217,059 (20/21) WorstFires per minute5.65 (19/19) WorstAA range4 km (1 of 2 tied) WorstAA threat1,549 (21/21) WorstFlak per wave (expected)1,260 (20/20) WorstTorpedo speed56 kt (1 of 2 tied) WorstRepair heal rate0.5 %/s (1 of 10 tied)

See 21 mid-pack stats

Not standouts for Napoli B -- 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 points59,200 HP(7/21) Smoke fire bloom7.58 km(11/21) Rudder shift12.6 s(14/21) Traverse-to-turn ratio5.02 ×(14/21) Main battery caliber254 mm(9/21) Main battery range15.53 km(14/21) Main battery reload15.3 s(13/21) HE shell damage3,450(9/19) HE fire chance16%(11/19) AP shell damage6,150(10/21) Main dispersion140.1 m(9/21) Acceleration26.4 s(9/21) AP arming threshold42 mm(15/21) Displacement26,892 t(14/21) AP pen at 10 km372 mm(10/21) Torpedo reload95 s(5/13) NormAP fuse timer0.03 s(11 of 21 tied at this value) NormAP ricochet start45°(14 of 21 tied at this value) NormAP auto-bounce angle60°(14 of 21 tied at this value) NormTurn speed retained81%(18 of 21 tied at this value) NormRepair charges2(15 of 21 tied at this value)

Peers in this cohort

Compare Legendary Cruisers

Show all 21 peers

Stats & specs

Customize in the Build Tool →

Survivability

Hit Points59,200

Displacement26,892 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.

242.9 x 28.06 m

Armor range16–330 mm

Plate armor thicknesses16, 20, 25, 30, 40, 45, 50, 55, 60, 80, 85, 90, 100, 120, 130, 180, 200, 220, 330 mm

Armor material/layer entries83

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.

40%

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 (5,328 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 (5,920 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.

29,600

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.

17,800

Effective HP

Base 59,200 HP plus everything Repair Party can restore: 0.5%/s x 28 s = 8,288 HP per charge, x2 charges = 16,576 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.

75,776

Repairable: penetration50%

Repairable: citadel10%

Repairable: steering gear50%

Main Battery

ModuleArtillery: 254 mm/60 M1939

Mounts / barrels3 mounts / 9 barrels

Reload time17 s

Firing range15.5 km

Turret traverse7 °/s

Turret armor250 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.

3x ±150°

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.

30° off bow / 30° off stern

See the firing-arcs diagram ↓

AP pen max range288 mm

HE fire DPM vs T8 BB41661

Effective HE DPM vs T8 BB151249

Shell Grouping (σ)2.15

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{15525}{30} \cdot \frac{8 - 1.1}{1000} + 1.1) \cdot 30 = 140.1 m

140.1 m at 15.5 km

Max Vert Disp

Vertical dispersion ellipse height at max range:

σ_{V} = σ_{H} \cdot radiusOnMax

= 140.1 \cdot 0.6 = 84.1 m

84.1 m at 15.5 km

Med Horiz Disp

50%-hit horizontal radius:

σ_{H, 50} = σ_{H} \cdot \frac{0.6}{σ}

= 140.1 \cdot \frac{0.6}{2.15} = 39.1 m

39.1 m at 15.5 km

Med Vert Disp

50%-hit vertical radius:

σ_{V, 50} = σ_{V} \cdot \frac{0.6}{σ}

= 84.1 \cdot \frac{0.6}{2.15} = 23.5 m

23.5 m at 15.5 km

Turret turn time

180 degrees / 7 deg/s traverse speed = 25.7 s.

25.7 s

Shells/min

Zero upgrades: 9 broadside guns x 60 / 17 s base reload = 31.8. All upgrades (Main Battery Mod. 3 = -10% reload): 9 broadside guns x 60 / 15.3 s all-upgrades reload = 35.3.

Initial: 31.8 → 35.3

HE shells

HE Damage3,450

HE Velocity954 m/s

Fire Chance16%

HE penetration

42 mm ≈ 254 mm caliber / 6 (standard HE penetration ratio).

42 mm

HE full-salvo alpha

3,450 HE damage x 9 broadside guns = 31,050.

31,050

HE DPM

Zero upgrades: 31,050 HE full-salvo alpha x 60 / 17 s base reload = 109,588. All upgrades (Main Battery Mod. 3 = -10% reload): 31,050 HE full-salvo alpha x 60 / 15.3 s all-upgrades reload = 121,765.

Initial: 109,588 → 121,765

Fires/min

Zero upgrades: 31.8 shells/min x 16% fire chance = 5.08. All upgrades (Main Battery Mod. 3 = -10% reload): 35.3 shells/min x 16% fire chance = 5.65.

Initial: 5.08 → 5.65

AP shells

AP Damage6,150

AP Velocity945 m/s

Min Ricochet45 deg

Guaranteed Ricochet60 deg

Fuse Timer0.033 s

Fuse Threshold42 mm

AP overmatch

floor(254 mm caliber / 14.3) = 17 mm (AP auto-penetrates plating this thick or less).

17 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 2650 \cdot {227.9}^{0.69} \cdot {0.254}^{- 1.07} \cdot 945^{1.38} = 620.9 mm

. Matches the in-game spec card.

620.9 mm point-blank

AP Pen Far

Same formula at the ship's max firing range (15.5 km), where the shell has slowed to 541.6 m/s:

P = 10^{- 7} \cdot 2650 \cdot {227.9}^{0.69} \cdot {0.254}^{- 1.07} \cdot {541.6}^{1.38} = 288 mm

288 mm at 15.5 km

AP full-salvo alpha

6,150 AP damage x 9 broadside guns = 55,350.

55,350

AP DPM

Zero upgrades: 55,350 AP full-salvo alpha x 60 / 17 s base reload = 195,353. All upgrades (Main Battery Mod. 3 = -10% reload): 55,350 AP full-salvo alpha x 60 / 15.3 s all-upgrades reload = 217,059.

Initial: 195,353 → 217,059

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 tubo lanciasiluri

Launchers / tubes2 launchers × 4 tubes = 8 tubes

Reload time95 s

Projectile speed56 kt

Range13.5 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 = 38, 700 \cdot 0.333 = 12, 900

≈ 12,900

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.

13,900

Torpedo detectability1.1 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{1.1 km}{56 kt \times 2.6855} = 7.3 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.

7.3 s

Flooding chance

Read straight from the game's own data: this torpedo carries a flooding-chance value of 2.3 per hit, shown as

2.3 \times 100 = 230 %

. 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.

230%

Torpedo launcher traverse25 °/s

Launch arcs142° per side

Torp Turn

Time to rotate the launchers 180 deg:

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

7.2 s

Torp Arming180 m

Per-side salvo damage

One side firing, all torpedoes hitting: per-side tubes x per-torpedo simulated damage = 4 x 12,900 = 51,600.

51,600

AA Defense

AA mount points19

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.

4 km

37 mm/54 Breda 19399×4 37mm

20 mm/70 Breda 194110×6 20mm

90 mm/50 OTO 1939 (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 90mm

Guns90 mm/50 OTO 1939 (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 91 from dual-purpose secondaries firing as AA in this range band.

Range4 km

Guns37 mm/54 Breda 1939

Continuous DPS

Effective DPS: 87 raw aura damage × 3.5 × 0.9 hit probability = 274 - the same in-game units as the Close-range AA DPS headline.

274

Range3.5 km

Total DPS in Aura

Far 91 + Medium 274 = 365

365

Guns20 mm/70 Breda 1941

Continuous DPS

Effective DPS: 38 raw aura damage × 3.5 × 0.85 hit probability = 113 - the same in-game units as the Close-range AA DPS headline.

113

Range2 km

Total DPS in Aura

Far 91 + Medium 274 + Near 113 = 478

478

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 × 200 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.

200

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 4 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.

2.5-4 km

See the AA layers diagram ↓

Secondary Battery

Mounts10

Firing range6.0 km

Shell Grouping (σ)1

Secondary dispersion type

Max dispersion = range (km) × 21 + 30. Each dispersion type sets its own slope; this is not a percentage applied to a standard baseline.

Napoli

Max secondary dispersion @ 6 km

6 km × 21 + 30 = 156 m.

156 m

Caliber152 mm

Reload time7.2 s

SAP Damage3,850

Muzzle Velocity950 m/s

Armor Pen42.3 mm

Min Ricochet70°

Max Ricochet90°

Show 1 more gun family

Caliber90 mm

Reload time3.2 s

SAP Damage2,000

Muzzle Velocity860 m/s

Armor Pen26 mm

Min Ricochet70°

Max Ricochet80°

Maneuverability

Engine power240,000 hp

Maximum speed35.5 kt

Turning circle radius750 m

Rudder shift time12.6 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 = 35.5 / 4 + 4.9 = 13.8 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.

13.8 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.

26.9 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).

10.6 kt

Acceleration 0-90%

Time to reach 90% of top speed (31.9 kt of 35.5 kt), from our in-house acceleration model.

26.4 s

Acceleration 0-99%

Time to reach 99% of top speed (35.1 kt of 35.5 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 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{35.5 \cdot 0.5144}{750} = 1.40 ° / s

, so

ratio = \frac{ω_{turret}}{ω_{hull}} = \frac{7}{1.40} = 5.0 \times

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

5.0× slow

See the full acceleration curve ↓

Concealment

Detectability by sea11.54 km

Detectability by air6.92 km

Smoke firing penalty7.58 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.

15.53 km

Detect when firing (air)

Air detectability plus the gun-firing bloom (5.08 km, which tracks main-battery caliber x 0.020). Matches the in-game 'Detect Firing Air' value on every captured ship.

12 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.

13.54 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.

9.92 km

Guaranteed Detect2 km

✦

Consumables

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

Choose one

Exhaust Smoke Generator2 charges · 180 s reload · 20 s emit / 35 s cloud active · 600 m radius

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

Catapult Fighter3 charges · 80 s reload · 90 s active · 5 km patrol radius
ƒ
Derived from the consumable's 30 m grid-unit range (km = grid units x 30 / 1000): $\frac{167 \times 30}{1000} = 5 km$
· 1 squadron size

Secondary Battery Booster3 charges · 160 s reload · 30 s active · +100% grouping · -50% dispersion

Repair Party2 charges · 80 s reload · 28 s active · 8,288 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.
· 16,576 HP (28% of max HP) total heal (all charges)
ƒ
14% per charge x 2 charges = up to 28% of max HP if the whole Repair Party loadout is used.
· 296 HP/s (0.5% of max HP) heal per second
ƒ
0.5% of max HP (59,200 HP) per second = 296 HP/s. WoWS heals a flat percent of MAX HP each second, so this rate holds at any health level.

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)2.15

Max Horiz Disp140.1 m at 15.5 km

Horizontal dispersion ellipse width at max range, from the verified WoWS dispersion model:  $σ_{H} = (\frac{R}{30} \cdot \frac{idealRadius - minRadius}{idealDistance} + minRadius) \cdot 30$   $= (\frac{15525}{30} \cdot \frac{8 - 1.1}{1000} + 1.1) \cdot 30 = 140.1 m$

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 Disp84.1 m at 15.5 km

Vertical dispersion ellipse height at max range: $σ_{V} = σ_{H} \cdot radiusOnMax$ $= 140.1 \cdot 0.6 = 84.1 m$

Shell scatter height @ 10 km53.9 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  $delim \cdot R_{m a x} = 0.5 \cdot 15525 = 7762$  m, and  $radiusOnMax = 0.6$  at 15525 m. Above the kink:  $k = 0.5 + (0.6 - 0.5) \cdot \frac{10000 - 7762}{15525 - 7762} = 0.5288$ , so  $σ_{V} = σ_{H} \cdot k = 102 \cdot 0.5288 = 53.9 m$ .

Med Horiz Disp39.1 m at 15.5 km

50%-hit horizontal radius: $σ_{H, 50} = σ_{H} \cdot \frac{0.6}{σ}$ $= 140.1 \cdot \frac{0.6}{2.15} = 39.1 m$

Med Vert Disp23.5 m at 15.5 km

50%-hit vertical radius: $σ_{V, 50} = σ_{V} \cdot \frac{0.6}{σ}$ $= 84.1 \cdot \frac{0.6}{2.15} = 23.5 m$

AP Pen Close620.9 mm point-blank

Canonical community AP formula (jcw780/wows_shell), evaluated at muzzle velocity:  $P = 10^{- 7} \cdot K \cdot m^{0.69} \cdot d^{- 1.07} \cdot v_{0}^{1.38}$   $= 10^{- 7} \cdot 2650 \cdot {227.9}^{0.69} \cdot {0.254}^{- 1.07} \cdot 945^{1.38} = 620.9 mm$ . Matches the in-game spec card.

AP Pen Far288 mm at 15.5 km

Same formula at the ship's max firing range (15.5 km), where the shell has slowed to 541.6 m/s:  $P = 10^{- 7} \cdot 2650 \cdot {227.9}^{0.69} \cdot {0.254}^{- 1.07} \cdot {541.6}^{1.38} = 288 mm$ .

AP pen 5 km479 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 km372 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 km295 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 km4.64 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:  $k = \frac{π C_{d} d^{2}}{8 m} = \frac{π \cdot 0.277 \cdot {0.254}^{2}}{8 \cdot 227.9} = 3.08 \times 10^{- 5}$ . That runs from a 945 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 flight time @ 10 km4.6 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:  $k = \frac{π C_{d} d^{2}}{8 m} = \frac{π \cdot 0.277 \cdot {0.254}^{2}}{8 \cdot 227.9} = 3.08 \times 10^{- 5}$ . That runs from a 954 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 penetration42 mm

42 mm ≈ 254 mm caliber / 6 (standard HE penetration ratio).

AP overmatch17 mm

floor(254 mm caliber / 14.3) = 17 mm (AP auto-penetrates plating this thick or less).

AP AOE Radius0

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 time25.7 s

180 degrees / 7 deg/s traverse speed = 25.7 s.

HE full-salvo alpha31,050

3,450 HE damage x 9 broadside guns = 31,050.

AP full-salvo alpha55,350

6,150 AP damage x 9 broadside guns = 55,350.

HE DPMInitial: 109,588 → 121,765

Zero upgrades: 31,050 HE full-salvo alpha x 60 / 17 s base reload = 109,588. All upgrades (Main Battery Mod. 3 = -10% reload): 31,050 HE full-salvo alpha x 60 / 15.3 s all-upgrades reload = 121,765.

AP DPMInitial: 195,353 → 217,059

Zero upgrades: 55,350 AP full-salvo alpha x 60 / 17 s base reload = 195,353. All upgrades (Main Battery Mod. 3 = -10% reload): 55,350 AP full-salvo alpha x 60 / 15.3 s all-upgrades reload = 217,059.

Shells/minInitial: 31.8 → 35.3

Zero upgrades: 9 broadside guns x 60 / 17 s base reload = 31.8. All upgrades (Main Battery Mod. 3 = -10% reload): 9 broadside guns x 60 / 15.3 s all-upgrades reload = 35.3.

Fires/minInitial: 5.08 → 5.65

Zero upgrades: 31.8 shells/min x 16% fire chance = 5.08. All upgrades (Main Battery Mod. 3 = -10% reload): 35.3 shells/min x 16% fire chance = 5.65.

Torpedoes

Torpedo detectability1.1 km

Estimated torpedo reaction time7.3 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 speed56 kt

Travel time to max range89.8 s

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

Torpedo module damage1,000

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 damage103,200

All tubes hitting one target: tubes x per-torpedo simulated damage = 8 x 12,900 = 103,200.

Per-side salvo damage51,600

One side firing, all torpedoes hitting: per-side tubes x per-torpedo simulated damage = 4 x 12,900 = 51,600.

AA defense

AA DPS at max range91

Only families that reach 4 km contribute at the outer edge of the AA bubble. In-game families: 37mm Breda barrels 4 9x4 -> 274 DPS @ 3.5 km; 20mm70 Breda barrels 6 10x6 -> 113 DPS @ 2 km; 90mm50 barrels 2 M1939 6x2 -> 91 DPS @ 4 km.

Maximum AA range4 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 range91 DPS @ 4 km, 365 DPS @ 3.5 km, 478 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-blank478

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

AA threat index1549

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 typeNapoli

Max dispersion = range (km) × 21 + 30. Each dispersion type sets its own slope; this is not a percentage applied to a standard baseline.

Max secondary dispersion @ 6 km156 m

6 km × 21 + 30 = 156 m.

Secondary dispersion @ 5 km135 m

Same per-type line evaluated at a fixed 5 km: 5 km × 21 + 30 = 135 m.

Secondary battery firepower

Secondary DPM (per side)417,500

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: 4×3 152 mm (6/side) × 60/7.2 × 3850 = 192,500 + 6×2 90 mm (6/side) × 60/3.2 × 2000 = 225,000. Assumes every shell hits (real hit rate is lower; the Brawl matchup tool on the Compare page folds in dispersion + target armor).

Max SAP alpha3850

Maximum SAP damage per shell across secondary SAP families. Best on this ship: 3850 from the 152 mm family.

Max SAP pen42.3 mm

Maximum SAP armor penetration across secondary SAP families. SAP auto-bounces past its ricochet angles but never shatters on plate it can pen, and it starts no fires. Best on this ship: 42.3 mm from the 152 mm family.

Open in Charting Tool

Ship Charts

Balance History

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

Buff ×4

2026-04-30

Ministry of Balance: Viva la Marina!

Added Enhanced Secondary Targeting to the third slot as an alternative to Catapult Fighter.

Read the full official post

2025-05-15

Ministry of Balance: New Horizons, Greater Heights

In case you missed it, during the middle of the last update, Napoli B received the same buff to her secondary battery range as her original version.
Secondary battery range increased from 5 to 6 km.

Read the full official post

2025-04-03

April Update: The Bonds of Loyalty

Secondary battery range increased from 5 to 6 km.

Read the full official post

Exteriors

Skins & permanent camouflages

Every custom exterior Napoli B 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.

2023-11-06 · Official ship feature / stats Black Friday: Ships & Sales Variant source 2026-04-30 · Patch notes May Update: From Rome to Edo Patch notes

Napoli B

Napoli B Community Stats

Napoli B Community Stats

Playstyle

Overview

Positioning

Potato Avoidance

Signature Traits →

How to get Napoli B

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

Ship Charts

Balance History

Ministry of Balance: Viva la Marina!

Ministry of Balance: New Horizons, Greater Heights

April Update: The Bonds of Loyalty

Skins & permanent camouflages

Primary official WG sources

Signature Traits