Main battery formulas
Shell Grouping (σ)1.5
Shell grouping (sigma); shown in-game as Shell Grouping.
Max Horiz Disp193.7 m
Horizontal dispersion ellipse width at max range, from the verified WoWS dispersion model: $\sigma_H = \left(\dfrac{R}{30}\cdot\dfrac{\text{idealRadius}-\text{minRadius}}{\text{idealDistance}} + \text{minRadius}\right)\cdot 30$ $= \left(\dfrac{13508}{30}\cdot\dfrac{13-1.1}{1000} + 1.1\right)\cdot 30 = 193.7\,\text{m}$
Max Vert Disp145.3 m
Vertical dispersion ellipse height at max range: $\sigma_V = \sigma_H \cdot \text{radiusOnMax}$ $= 193.7 \cdot 0.75 = 145.3\,\text{m}$
Med Horiz Disp74 m
50%-hit horizontal radius: $\sigma_{H,50} = \sigma_H \cdot \text{GetHalfHitsRatio}(\sigma)$ $= 193.7 \cdot 0.382\;(\sigma = 1.5) = 74\,\text{m}$
Med Vert Disp55.5 m
50%-hit vertical radius: $\sigma_{V,50} = \sigma_V \cdot \text{GetHalfHitsRatio}(\sigma)$ $= 145.3 \cdot 0.382\;(\sigma = 1.5) = 55.5\,\text{m}$
AP Pen Close620.4 mm
Canonical community AP formula (jcw780/wows_shell), evaluated at muzzle velocity: $P = 10^{-7}\cdot K \cdot m^{0.69} \cdot d^{-1.07} \cdot v_0^{1.38}$ $= 10^{-7}\cdot 2627 \cdot 470.9^{0.69} \cdot 0.305^{-1.07} \cdot 762^{1.38} = 620.4\,\text{mm}$. Matches the in-game spec card.
AP Pen Far253.9 mm
Same formula at the ship's max firing range (16.9 km), where the shell has slowed to 398.8 m/s: $P = 10^{-7}\cdot 2627 \cdot 470.9^{0.69} \cdot 0.305^{-1.07} \cdot 398.8^{1.38} = 253.9\,\text{mm}$.
HE penetration51 mm
51 mm ≈ 305 mm caliber / 6 (standard HE penetration ratio).
AP overmatch21 mm
floor(305 mm caliber / 14.3) = 21 mm (AP auto-penetrates plating this thick or less).
AP AOE Radius40
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 alpha10
All 10 barrels bear on the broadside.
Turret turn time45 s
180 degrees / 4 deg/s traverse speed = 45 s.
HE full-salvo alpha45,000
4,500 HE damage x 10 broadside guns = 45,000.
AP full-salvo alpha86,000
8,600 AP damage x 10 broadside guns = 86,000.
Base HE DPM81,818
45,000 HE full-salvo alpha x 60 / 33 s base reload = 81,818.
Base AP DPM156,364
86,000 AP full-salvo alpha x 60 / 33 s base reload = 156,364.
Base shells/min18.2
10 broadside guns x 60 / 33 s base reload = 18.2.
Base fires/min6
10 HE shells x 60 / 33 s reload x 33% fire chance = 6.
AA defense
AA DPS at point-blank34
In-game AA card sum: 34 DPS, achievable only when a target is inside the shortest-range AA family. Captured as a point-blank total only -- per-family breakdown not yet recorded for this ship, so the DPS at 3 km is unknown.
Maximum AA range3 km
In-game AA card max range: 3 km. Only the longest-reach family contributes at this distance.
AA threat index102
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.
Secondary battery firepower
Secondary DPM (per side)83,314
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: 14×1 120 mm (7/side) × 60/8.57 × 1700 = 83,314. 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 chance8%
Maximum per-shell fire chance across secondary HE families (before target fire resistance is applied). Best on this ship: 8% 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.
Damage Control Party
Repair Party
Secondary Battery Booster