Main battery formulas
Shell Grouping (σ)2
Shell grouping (sigma); shown in-game as Shell Grouping.
Max Horiz Disp87.7 m
Horizontal dispersion ellipse width at max range. (R/30·(idealRadius−minRadius)/idealDistance + minRadius)·30 = (9694/30·(8−0.5)/1000 + 0.5)·30 = 87.7 m
Max Vert Disp52.6 m
Vertical dispersion ellipse height at max range = max horizontal × radiusOnMax = 87.7 × 0.6 = 52.6 m
Med Horiz Disp28 m
50%-hit horizontal radius = max horizontal × GetHalfHitsRatio(σ) = 87.7 × 0.319 (σ=2) = 28 m
Med Vert Disp16.8 m
50%-hit vertical radius = max vertical × GetHalfHitsRatio(σ) = 52.6 × 0.319 (σ=2) = 16.8 m
AP Pen Close235.4 mm
Canonical community AP formula (jcw780/wows_shell), evaluated at muzzle velocity: 1e-7 × Krupp × mass^0.69 × caliber_m^-1.07 × v0^1.38 = 1e-7 × 2500 × 23.5^0.69 × 0.12^-1.07 × 850^1.38 = 235.4 mm. Matches the in-game spec card.
AP Pen Far49.3 mm
Same formula at the ship's max firing range (13.3 km), where the shell has slowed to 273.7 m/s: 1e-7 × 2500 × 23.5^0.69 × 0.12^-1.07 × 273.7^1.38 = 49.3 mm.
HE penetration20 mm
20 mm ≈ 120 mm caliber / 6 (standard HE penetration ratio).
AP overmatch8 mm
floor(120 mm caliber / 14.3) = 8 mm (AP auto-penetrates plating this thick or less).
AP AOE Radius9
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 alpha4
All 4 barrels bear on the broadside.
Turret turn time18 s
180 degrees / 10 deg/s traverse speed = 18 s.
HE full-salvo alpha6,800
1,700 HE damage x 4 broadside guns = 6,800.
AP full-salvo alpha8,600
2,150 AP damage x 4 broadside guns = 8,600.
Base HE DPM127,500
6,800 HE full-salvo alpha x 60 / 3.2 s base reload = 127,500.
Base AP DPM161,250
8,600 AP full-salvo alpha x 60 / 3.2 s base reload = 161,250.
Base shells/min75
4 broadside guns x 60 / 3.2 s base reload = 75.
Base fires/min5.25
4 HE shells x 60 / 3.2 s reload x 7% fire chance = 5.25.
Torpedoes
Torpedo detectability1.6 km
Estimated torpedo reaction time8.1 s
detectability / (speed kt x 2.6 community game-speed factor).
Torpedo speed76 kt
Travel time to max range60.7 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 damage40,998
tube count x per-torpedo simulated damage (all torpedoes hitting).
Per-side salvo damage40,998
per-side salvo x per-torpedo simulated damage.
AA defense
Close-range AA DPS187
Sum across every AA aura on this ship of (aura.continuous_damage x 3.5 x aura.hit_probability). Here: (20×3.5×1) + (12×3.5×0.95) + (22×3.5×1) = 187. 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 range5 km
Longest-reaching aura across AA-only + dual-purpose auras.
AA threat index730
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 range2.5 km
Damage Control Party
Engine Boost
Repair Party
Defensive AA Fire