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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 HE shells in Legendary CAs (954).
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.
Her 254mm shells citadel cruisers on the wrong frame, and her 59,200-HP hull does not recover from a punished salvo. Pick rotations and angles deliberately; the chip-damage role pays better than the trade-blow role on a cruiser of this profile.
330.0 mm max plate, best of Legendary CAs.
954.0 m/s HE muzzle velocity, best of Legendary CAs. Flatter trajectory, easier to land at range.
417500.0 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.
217059 AP DPM, bottom decile of Legendary CAs. Citadel windows matter more than spam.
4.0 km AA reach, bottom decile of Legendary CAs. Drops bombs and rockets land before AA bites.
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.
Pair with a commander whose unique skill complements her main armament; check the build tool for current recommendations.
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Where Napoli B sits among Legendary CAs (22 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.
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.
Damage Control Party∞ charges · 60 s reload · 5 s active
Exhaust Smoke Generator2 charges · 180 s reload · 20 s emit / 35 s cloud active
Defensive AA Fire3 charges · 140 s reload · 25 s active · +100% flak burst boost
Catapult Fighter3 charges · 80 s reload · 90 s active · 5 km patrol radius 
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) 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.
Horizontal dispersion ellipse width at max range, from the verified WoWS dispersion model: $\sigma_H = \left(\dfrac{R}{30}\cdot\dfrac{\text{idealRadius}-\text{minRadius}}{\text{idealDistance}} + \text{minRadius}\right)\cdot 30$ $= \left(\dfrac{15525}{30}\cdot\dfrac{8-1.1}{1000} + 1.1\right)\cdot 30 = 140.1\,\text{m}$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.Vertical dispersion ellipse height at max range: $\sigma_V = \sigma_H \cdot \text{radiusOnMax}$ $= 140.1 \cdot 0.6 = 84.1\,\text{m}$How tall the same scatter ellipse is at 10 km. Comparable from ship to ship for the same reason as the width value above.50%-hit horizontal radius: $\sigma_{H,50} = \sigma_H \cdot \text{GetHalfHitsRatio}(\sigma)$ $= 140.1 \cdot 0.303\;(\sigma = 2.15) = 42.4\,\text{m}$50%-hit vertical radius: $\sigma_{V,50} = \sigma_V \cdot \text{GetHalfHitsRatio}(\sigma)$ $= 84.1 \cdot 0.302\;(\sigma = 2.15) = 25.4\,\text{m}$Canonical community AP formula (jcw780/wows_shell), evaluated at muzzle velocity: $P = 10^{-7}\cdot K \cdot m^{0.69} \cdot d^{-1.07} \cdot v_0^{1.38}$ $= 10^{-7}\cdot 2650 \cdot 227.9^{0.69} \cdot 0.254^{-1.07} \cdot 945^{1.38} = 620.9\,\text{mm}$. Matches the in-game spec card.Same formula at the ship's max firing range (19.4 km), where the shell has slowed to 485.9 m/s: $P = 10^{-7}\cdot 2650 \cdot 227.9^{0.69} \cdot 0.254^{-1.07} \cdot 485.9^{1.38} = 247.9\,\text{mm}$.42 mm ≈ 254 mm caliber / 6 (standard HE penetration ratio).floor(254 mm caliber / 14.3) = 17 mm (AP auto-penetrates plating this thick or less).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.All 9 barrels bear on the broadside.180 degrees / 7 deg/s traverse speed = 25.7 s.3,450 HE damage x 9 broadside guns = 31,050.6,150 AP damage x 9 broadside guns = 55,350.31,050 HE full-salvo alpha x 60 / 17 s base reload = 109,588.55,350 AP full-salvo alpha x 60 / 17 s base reload = 195,353.31,050 HE full-salvo alpha x 60 / 15.3 s installed reload (Main Battery Mod. 3 = -10%) = 121,765.55,350 AP full-salvo alpha x 60 / 15.3 s installed reload (Main Battery Mod. 3 = -10%) = 217,059.9 broadside guns x 60 / 17 s base reload = 31.8.9 broadside guns x 60 / 15.3 s installed Artillery reload = 35.3.31.8 shells/min x 16% fire chance = 5.08.35.3 shells/min x 16% fire chance = 5.65.detectability / (speed kt x 2.6 community game-speed factor).range / (speed kt x 2.6 community game-speed factor).2 launchers x 4 tubes.tube count / 2 (symmetric port/starboard launcher layout; common on cruisers and battleships with deck torpedoes).All tubes hitting one target: tubes x per-torpedo simulated damage = 8 x 12,900 = 103,200.One side firing, all torpedoes hitting: per-side tubes x per-torpedo simulated damage = 4 x 12,900 = 51,600.Sum across every AA aura on this ship of (aura.continuous_damage x 3.5 x aura.hit_probability). Here: (87×3.5×0.9) + (38×3.5×0.85) + (29×3.5×0.9) = 478. Covers AA-only mounts plus dual-purpose secondaries (Bismarck 105mm, USN 5"/38 cruiser secondaries) and dual-purpose main batteries (Sumner-class 5"/38, Akizuki-line 100mm). Formula validated against in-game captures on California, Sumner, Manfred von Richthofen, Dante Alighieri (exact) and within +/-17% on the remaining verified ships.Longest-reaching aura across AA-only + dual-purpose auras.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.Max dispersion = range (km) × 21 + 30. Each dispersion type sets its own slope; this is not a percentage applied to a standard baseline.6 km × 21 + 30 = 156 m.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).Maximum SAP damage per shell across secondary SAP families. Best on this ship: 3850 from the 152 mm family.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.Balance updates affecting Napoli B. Cards are condensed; use each source link for full context.
Every custom exterior Napoli B can equip, from in-game data.
Filtered to official World of Warships: Legends pages where this ship is a focus, reward, line member, or high-context variant mention.