Main battery formulas
Shell Grouping (σ)2
Shell grouping (sigma); shown in-game as Shell Grouping.
Max Horiz Disp142.2 m
Horizontal dispersion ellipse width at max range. (R/30·(idealRadius−minRadius)/idealDistance + minRadius)·30 = (15820/30·(8−1.1)/1000 + 1.1)·30 = 142.2 m
Max Vert Disp85.3 m
Vertical dispersion ellipse height at max range = max horizontal × radiusOnMax = 142.2 × 0.6 = 85.3 m
Med Horiz Disp45.4 m
50%-hit horizontal radius = max horizontal × GetHalfHitsRatio(σ) = 142.2 × 0.319 (σ=2) = 45.4 m
Med Vert Disp27.3 m
50%-hit vertical radius = max vertical × GetHalfHitsRatio(σ) = 85.3 × 0.32 (σ=2) = 27.3 m
AP Pen Close452.6 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 × 2409 × 122^0.69 × 0.203^-1.07 × 925^1.38 = 452.6 mm. Matches the in-game spec card.
AP Pen Far144.1 mm
Same formula at the ship's max firing range (19.8 km), where the shell has slowed to 403.6 m/s: 1e-7 × 2409 × 122^0.69 × 0.203^-1.07 × 403.6^1.38 = 144.1 mm.
HE penetration51 mm
51 mm ≈ 203 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 ~50mm armor instead of ~33mm. Hits every German cruiser (150mm CL, 203mm CA) and BB (350mm+), British heavy cruisers / Lion / Nelson, a handful of other premiums.
AP overmatch14 mm
floor(203 mm caliber / 14.3) = 14 mm (AP auto-penetrates plating this thick or less).
AP AOE Radius30
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 time22.5 s
180 degrees / 8 deg/s traverse speed = 22.5 s.
HE full-salvo alpha21,600
2,700 HE damage x 8 broadside guns = 21,600.
AP full-salvo alpha48,000
6,000 AP damage x 8 broadside guns = 48,000.
Base HE DPM99,692
21,600 HE full-salvo alpha x 60 / 13 s base reload = 99,692.
Base AP DPM221,538
48,000 AP full-salvo alpha x 60 / 13 s base reload = 221,538.
Installed HE DPM110,769
21,600 HE full-salvo alpha x 60 / 11.7 s installed reload (Main Battery Mod. 3 = -10%) = 110,769.
Installed AP DPM246,154
48,000 AP full-salvo alpha x 60 / 11.7 s installed reload (Main Battery Mod. 3 = -10%) = 246,154.
Base shells/min36.9
8 broadside guns x 60 / 13 s base reload = 36.9.
Installed shells/min41
8 broadside guns x 60 / 11.7 s installed Artillery reload = 41.
Base fires/min4.8
8 HE shells x 60 / 13 s reload x 13% fire chance = 4.8.
Installed fires/min5.33
8 HE shells x 60 / 11.7 s installed reload x 13% fire chance = 5.33.
Torpedoes
Torpedo detectability1.2 km
Estimated torpedo reaction time7.7 s
detectability / (speed kt x 2.6 community game-speed factor).
Torpedo speed60 kt
Travel time to max range51.3 s
range / (speed kt x 2.6 community game-speed factor).
Tube count12
4 launchers x 3 tubes.
Per-side salvo6 torpedoes
tube count / 2 (symmetric port/starboard launcher layout; common on cruisers and battleships with deck torpedoes).
Full-salvo damage152,400
tube count x per-torpedo simulated damage (all torpedoes hitting).
Per-side salvo damage76,200
per-side salvo x per-torpedo simulated damage.
AA defense
Close-range AA DPS411
Sum across every AA aura on this ship of (aura.continuous_damage x 3.5 x aura.hit_probability). Here: (69×3.5×0.9) + (27×3.5×0.85) + (36×3.5×0.9) = 411. 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 index1432
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)128,955
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: 6×2 105 mm (6/side) × 60/3.35 × 1200 = 128,955. Assumes every shell hits (real hit rate is lower; the Brawl matchup tool on the Compare page folds in dispersion + target armor).
Max HE alpha1200
Maximum HE damage per shell across secondary HE families. Best on this ship: 1200 from the 105 mm family.
Max HE fire chance5%
Maximum per-shell fire chance across secondary HE families (before target fire resistance is applied). Best on this ship: 5% from the 105 mm family.
Max HE pen20 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: 20 mm from the 105 mm family.
Damage Control Party
Sonar
Defensive AA Fire
Catapult Fighter
Main Battery Reload Booster
Repair Party