Main battery formulas
Shell Grouping (σ)2
Shell grouping (sigma); shown in-game as Shell Grouping.
Max Horiz Disp241.3 m
Horizontal dispersion ellipse width at max range. (R/30·(idealRadius−minRadius)/idealDistance + minRadius)·30 = (17883/30·(12−2.2)/1000 + 2.2)·30 = 241.3 m
Max Vert Disp144.8 m
Vertical dispersion ellipse height at max range = max horizontal × radiusOnMax = 241.3 × 0.6 = 144.8 m
Med Horiz Disp77.1 m
50%-hit horizontal radius = max horizontal × GetHalfHitsRatio(σ) = 241.3 × 0.32 (σ=2) = 77.1 m
Med Vert Disp46.3 m
50%-hit vertical radius = max vertical × GetHalfHitsRatio(σ) = 144.8 × 0.32 (σ=2) = 46.3 m
AP Pen Close573.5 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 × 2312 × 330^0.69 × 0.283^-1.07 × 890^1.38 = 573.5 mm. Matches the in-game spec card.
AP Pen Far238.2 mm
Same formula at the ship's max firing range (22.4 km), where the shell has slowed to 470.9 m/s: 1e-7 × 2312 × 330^0.69 × 0.283^-1.07 × 470.9^1.38 = 238.2 mm.
HE penetration71 mm
71 mm ≈ 283 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) - 0.251 in this case. Lets HE pen ~70mm armor instead of ~47mm. Hits every German cruiser (150mm CL, 203mm CA) and BB (350mm+), British heavy cruisers / Lion / Nelson, a handful of other premiums.
AP overmatch19 mm
floor(283 mm caliber / 14.3) = 19 mm (AP auto-penetrates plating this thick or less).
AP AOE Radius60
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 alpha9
All 9 barrels bear on the broadside.
Turret turn time25 s
180 degrees / 7.2 deg/s traverse speed = 25 s.
HE full-salvo alpha28,800
3,200 HE damage x 9 broadside guns = 28,800.
AP full-salvo alpha68,400
7,600 AP damage x 9 broadside guns = 68,400.
Base HE DPM86,400
28,800 HE full-salvo alpha x 60 / 20 s base reload = 86,400.
Base AP DPM205,200
68,400 AP full-salvo alpha x 60 / 20 s base reload = 205,200.
Base shells/min27
9 broadside guns x 60 / 20 s base reload = 27.
Base fires/min5.4
9 HE shells x 60 / 20 s reload x 20% fire chance = 5.4.
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 count6
2 launchers x 3 tubes.
Per-side salvo3 torpedoes
tube count / 2 (symmetric port/starboard launcher layout; common on cruisers and battleships with deck torpedoes).
Full-salvo damage76,200
tube count x per-torpedo simulated damage (all torpedoes hitting).
Per-side salvo damage38,100
per-side salvo x per-torpedo simulated damage.
AA defense
Close-range AA DPS248
Sum across every AA aura on this ship of (aura.continuous_damage x 3.5 x aura.hit_probability). Here: (12×3.5×0.75) + (40×3.5×0.7) + (45×3.5×0.75) = 248. 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 index838
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)232,048
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: 7×2 105 mm (7/side) × 60/3.35 × 1200 = 150,448 + 4×2 150 mm (4/side) × 60/7.5 × 1700 = 54,400 + 4×1 150 mm (2/side) × 60/7.5 × 1700 = 27,200. 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
Catapult Fighter
Observation Seaplane
Secondary Battery Booster
