Main battery formulas
Shell Grouping (σ)1.8
Shell grouping (sigma); shown in-game as Shell Grouping.
Max Horiz Disp207.2 m
Horizontal dispersion ellipse width at max range. (R/30·(idealRadius−minRadius)/idealDistance + minRadius)·30 = (14406/30·(12−2.2)/1000 + 2.2)·30 = 207.2 m
Max Vert Disp124.3 m
Vertical dispersion ellipse height at max range = max horizontal × radiusOnMax = 207.2 × 0.6 = 124.3 m
Med Horiz Disp71.2 m
50%-hit horizontal radius = max horizontal × GetHalfHitsRatio(σ) = 207.2 × 0.344 (σ=1.8) = 71.2 m
Med Vert Disp42.7 m
50%-hit vertical radius = max vertical × GetHalfHitsRatio(σ) = 124.3 × 0.344 (σ=1.8) = 42.7 m
AP Pen Close675.4 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 × 2454 × 750^0.69 × 0.38^-1.07 × 800^1.38 = 675.4 mm. Matches the in-game spec card.
AP Pen Far278.9 mm
Same formula at the ship's max firing range (19.8 km), where the shell has slowed to 421.4 m/s: 1e-7 × 2454 × 750^0.69 × 0.38^-1.07 × 421.4^1.38 = 278.9 mm.
HE penetration95 mm
95 mm ≈ 380 mm caliber / 4 (improved HE penetration: German BBs, Yamato-class, and a handful of others).
Improved HE PenYes
This ship's HE shells use a 1/4 (~0.25) caliber-to-pen ratio instead of the standard 1/6 (~0.167) - 0.25 in this case. Lets HE pen ~95mm armor instead of ~63mm. Hits every German cruiser (150mm CL, 203mm CA) and BB (350mm+), British heavy cruisers / Lion / Nelson, a handful of other premiums.
AP overmatch26 mm
floor(380 mm caliber / 14.3) = 26 mm (AP auto-penetrates plating this thick or less).
AP AOE Radius90
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 alpha8
All 8 barrels bear on the broadside.
Turret turn time51.4 s
180 degrees / 3.5 deg/s traverse speed = 51.4 s.
HE full-salvo alpha36,000
4,500 HE damage x 8 broadside guns = 36,000.
AP full-salvo alpha87,200
10,900 AP damage x 8 broadside guns = 87,200.
Base HE DPM72,000
36,000 HE full-salvo alpha x 60 / 30 s base reload = 72,000.
Base AP DPM174,400
87,200 AP full-salvo alpha x 60 / 30 s base reload = 174,400.
Base shells/min16
8 broadside guns x 60 / 30 s base reload = 16.
Base fires/min5.6
8 HE shells x 60 / 30 s reload x 35% fire chance = 5.6.
AA defense
Close-range AA DPS99
Sum across every AA aura on this ship of (aura.continuous_damage x 3.5 x aura.hit_probability). Here: (9×3.5×0.75) + (22×3.5×0.7) + (8×3.5×0.75) = 99. 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 range3.5 km
Longest-reaching aura across AA-only + dual-purpose auras.
AA threat index253
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 firepower
Secondary DPM (per side)160,817
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: 16×1 150 mm (8/side) × 60/8.57 × 1800 = 100,817 + 8×1 88 mm (4/side) × 60/4 × 1000 = 60,000. Assumes every shell hits (real hit rate is lower; the Brawl matchup tool on the Compare page folds in dispersion + target armor).
Max HE alpha1800
Maximum HE damage per shell across secondary HE families. Best on this ship: 1800 from the 150 mm family.
Max HE fire chance10%
Maximum per-shell fire chance across secondary HE families (before target fire resistance is applied). Best on this ship: 10% from the 150 mm family.
Max HE pen38 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: 38 mm from the 150 mm family.
Damage Control Party
Repair Party
Secondary Battery Booster
