Main battery formulas
Shell Grouping (σ)2
Shell grouping (sigma); shown in-game as Shell Grouping.
Max Horiz Disp80.2 m
Horizontal dispersion ellipse width at max range, from the verified WoWS dispersion model: $\sigma_H = \left(\dfrac{R}{30}\cdot\dfrac{\text{idealRadius}-\text{minRadius}}{\text{idealDistance}} + \text{minRadius}\right)\cdot 30$ $= \left(\dfrac{8687}{30}\cdot\dfrac{8-0.5}{1000} + 0.5\right)\cdot 30 = 80.2\,\text{m}$
Max Vert Disp48.1 m
Vertical dispersion ellipse height at max range: $\sigma_V = \sigma_H \cdot \text{radiusOnMax}$ $= 80.2 \cdot 0.6 = 48.1\,\text{m}$
Med Horiz Disp25.6 m
50%-hit horizontal radius: $\sigma_{H,50} = \sigma_H \cdot \text{GetHalfHitsRatio}(\sigma)$ $= 80.2 \cdot 0.319\;(\sigma = 2) = 25.6\,\text{m}$
Med Vert Disp15.4 m
50%-hit vertical radius: $\sigma_{V,50} = \sigma_V \cdot \text{GetHalfHitsRatio}(\sigma)$ $= 48.1 \cdot 0.32\;(\sigma = 2) = 15.4\,\text{m}$
AP Pen Close125.7 mm
Canonical community AP formula (jcw780/wows_shell), evaluated at muzzle velocity: $P = 10^{-7}\cdot K \cdot m^{0.69} \cdot d^{-1.07} \cdot v_0^{1.38}$ $= 10^{-7}\cdot 1451 \cdot 14.97^{0.69} \cdot 0.102^{-1.07} \cdot 884^{1.38} = 125.7\,\text{mm}$. Matches the in-game spec card.
AP Pen Far27.1 mm
Same formula at the ship's max firing range (10.9 km), where the shell has slowed to 291 m/s: $P = 10^{-7}\cdot 1451 \cdot 14.97^{0.69} \cdot 0.102^{-1.07} \cdot 291^{1.38} = 27.1\,\text{mm}$.
HE penetration17 mm
17 mm ≈ 102 mm caliber / 6 (standard HE penetration ratio).
AP overmatch7 mm
floor(102 mm caliber / 14.3) = 7 mm (AP auto-penetrates plating this thick or less).
AP AOE Radius3
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 alpha3
All 3 barrels bear on the broadside.
Turret turn time15.7 s
180 degrees / 11.5 deg/s traverse speed = 15.7 s.
HE full-salvo alpha4,500
1,500 HE damage x 3 broadside guns = 4,500.
AP full-salvo alpha5,100
1,700 AP damage x 3 broadside guns = 5,100.
Base HE DPM38,571
4,500 HE full-salvo alpha x 60 / 7 s base reload = 38,571.
Base AP DPM43,714
5,100 AP full-salvo alpha x 60 / 7 s base reload = 43,714.
Base shells/min25.7
3 broadside guns x 60 / 7 s base reload = 25.7.
Base fires/min1.54
3 HE shells x 60 / 7 s reload x 6% fire chance = 1.54.
Torpedoes
Torpedo detectability1.2 km
Estimated torpedo reaction time8.1 s
detectability / (speed kt x 2.6 community game-speed factor).
Torpedo speed57 kt
Travel time to max range50.6 s
range / (speed kt x 2.6 community game-speed factor).
Tube count6
2 launchers x 3 tubes.
Per-side salvo6 torpedoes
6 (centerline launchers train across - full salvo to either side).
Full-salvo damage66,402
All tubes hitting one target: tubes x per-torpedo simulated damage = 6 x 11,067 = 66,402.
Per-side salvo damage66,402
One side firing, all torpedoes hitting: per-side tubes x per-torpedo simulated damage = 6 x 11,067 = 66,402.
AA defense
Close-range AA DPS20
Sum across every AA aura on this ship of (aura.continuous_damage x 3.5 x aura.hit_probability). Here: (1×3.5×1) + (5×3.5×0.95) = 20. 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.
Maximum AA range3 km
Longest-reaching aura across AA-only + dual-purpose auras.
AA threat index30
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 range1.2 km
Damage Control Party
Smoke Generator
Engine Boost