Main battery formulas
Shell Grouping (σ)1.5
Shell grouping (sigma); shown in-game as Shell Grouping.
Max Horiz Disp234.3 m
Horizontal dispersion ellipse width at max range. (R/30·(idealRadius−minRadius)/idealDistance + minRadius)·30 = (17177/30·(12−2.2)/1000 + 2.2)·30 = 234.3 m
Max Vert Disp140.6 m
Vertical dispersion ellipse height at max range = max horizontal × radiusOnMax = 234.3 × 0.6 = 140.6 m
Med Horiz Disp89.5 m
50%-hit horizontal radius = max horizontal × GetHalfHitsRatio(σ) = 234.3 × 0.382 (σ=1.5) = 89.5 m
Med Vert Disp53.7 m
50%-hit vertical radius = max vertical × GetHalfHitsRatio(σ) = 140.6 × 0.382 (σ=1.5) = 53.7 m
AP Pen Close729.4 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 × 2450 × 800^0.69 × 0.38^-1.07 × 820^1.38 = 729.4 mm. Matches the in-game spec card.
AP Pen Far389.9 mm
Same formula at the ship's max firing range (21.5 km), where the shell has slowed to 520.8 m/s: 1e-7 × 2450 × 800^0.69 × 0.38^-1.07 × 520.8^1.38 = 389.9 mm.
HE penetration95 mm
95 mm ≈ 381 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) - 0.249 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(381 mm caliber / 14.3) = 26 mm (AP auto-penetrates plating this thick or less).
AP AOE Radius200
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 alpha12
All 12 barrels bear on the broadside.
Turret turn time36 s
180 degrees / 5 deg/s traverse speed = 36 s.
HE full-salvo alpha52,800
4,400 HE damage x 12 broadside guns = 52,800.
AP full-salvo alpha139,200
11,600 AP damage x 12 broadside guns = 139,200.
Base HE DPM96,000
52,800 HE full-salvo alpha x 60 / 33 s base reload = 96,000.
Base AP DPM253,091
139,200 AP full-salvo alpha x 60 / 33 s base reload = 253,091.
Installed HE DPM106,667
52,800 HE full-salvo alpha x 60 / 29.7 s installed reload (Main Battery Mod. 3 = -10%) = 106,667.
Installed AP DPM281,212
139,200 AP full-salvo alpha x 60 / 29.7 s installed reload (Main Battery Mod. 3 = -10%) = 281,212.
Base shells/min21.8
12 broadside guns x 60 / 33 s base reload = 21.8.
Installed shells/min24.2
12 broadside guns x 60 / 29.7 s installed Artillery reload = 24.2.
Base fires/min7.42
12 HE shells x 60 / 33 s reload x 34% fire chance = 7.42.
Installed fires/min8.24
12 HE shells x 60 / 29.7 s installed reload x 34% fire chance = 8.24.
Torpedoes
Torpedo detectability1.3 km
Estimated torpedo reaction time7.8 s
detectability / (speed kt x 2.6 community game-speed factor).
Torpedo speed64 kt
Travel time to max range36.1 s
range / (speed kt x 2.6 community game-speed factor).
Tube count8
2 launchers x 4 tubes.
Per-side salvo4 torpedoes
tube count / 2 (symmetric port/starboard launcher layout; common on cruisers and battleships with deck torpedoes).
Full-salvo damage101,600
tube count x per-torpedo simulated damage (all torpedoes hitting).
Per-side salvo damage50,800
per-side salvo x per-torpedo simulated damage.
AA defense
Close-range AA DPS446
Sum across every AA aura on this ship of (aura.continuous_damage x 3.5 x aura.hit_probability). Here: (134×3.5×0.7) + (45×3.5×0.75) = 446. 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 range4.5 km
Longest-reaching aura across AA-only + dual-purpose auras.
AA threat index1516
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 range3 km
Secondary battery firepower
Secondary DPM (per side)253,540
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: 8×2 105 mm (8/side) × 60/3.35 × 1200 = 171,940 + 2×2 150 mm (2/side) × 60/7.5 × 1700 = 27,200 + 4×2 150 mm (4/side) × 60/7.5 × 1700 = 54,400. 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 150 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 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
Sonar