Main battery formulas
Shell Grouping (σ)2
Shell grouping (sigma); shown in-game as Shell Grouping.
Max Horiz Disp122.5 m
Horizontal dispersion ellipse width at max range. (R/30·(idealRadius−minRadius)/idealDistance + minRadius)·30 = (12967/30·(8−1.1)/1000 + 1.1)·30 = 122.5 m
Max Vert Disp73.5 m
Vertical dispersion ellipse height at max range = max horizontal × radiusOnMax = 122.5 × 0.6 = 73.5 m
Med Horiz Disp39.1 m
50%-hit horizontal radius = max horizontal × GetHalfHitsRatio(σ) = 122.5 × 0.319 (σ=2) = 39.1 m
Med Vert Disp23.5 m
50%-hit vertical radius = max vertical × GetHalfHitsRatio(σ) = 73.5 × 0.32 (σ=2) = 23.5 m
Dispersion familyCruiser Disp.
Standard cruiser dispersion baseline.
AP Pen Close403.3 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 × 2650 × 116.1^0.69 × 0.203^-1.07 × 814^1.38 = 403.3 mm. Matches the in-game spec card.
AP Pen Far135.6 mm
Same formula at the ship's max firing range (17.8 km), where the shell has slowed to 369.4 m/s: 1e-7 × 2650 × 116.1^0.69 × 0.203^-1.07 × 369.4^1.38 = 135.6 mm.
HE penetration34 mm
34 mm ≈ 203 mm caliber / 6 (standard HE penetration ratio).
AP overmatch14 mm
floor(203 mm caliber / 14.3) = 14 mm (AP auto-penetrates plating this thick or less).
AP AOE Radius25
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 alpha26,400
3,300 HE damage x 8 broadside guns = 26,400.
AP full-salvo alpha36,000
4,500 AP damage x 8 broadside guns = 36,000.
Base HE DPM109,241
26,400 HE full-salvo alpha x 60 / 14.5 s base reload = 109,241.
Base AP DPM148,966
36,000 AP full-salvo alpha x 60 / 14.5 s base reload = 148,966.
Base shells/min33.1
8 broadside guns x 60 / 14.5 s base reload = 33.1.
Base fires/min5.63
8 HE shells x 60 / 14.5 s reload x 17% fire chance = 5.63.
Torpedoes
Torpedo detectability1.3 km
Estimated torpedo reaction time8.2 s
detectability / (speed kt x 2.6 community game-speed factor).
Torpedo speed61 kt
Travel time to max range50.5 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 damage114,664
tube count x per-torpedo simulated damage (all torpedoes hitting).
Per-side salvo damage57,332
per-side salvo x per-torpedo simulated damage.
AA defense
AA DPS at max range88
Only families that reach 5 km contribute at the outer edge of the AA bubble. In-game families: 20mm 10x2 -> 112 DPS @ 2 km; 20mm Oerlikon Mk IV (?) -> 89 DPS @ 2 km; 102mm 4x2 -> 88 DPS @ 5 km; 40mm 4x8 -> 139 DPS @ 2.5 km.
Maximum AA range5 km
Longest-reaching family on the in-game AA card. Decoded AirDefense aura max range is 2.5 km; dual-purpose mount auras extend it.
AA DPS layered by range88 DPS @ 5 km, 227 DPS @ 2.5 km, 428 DPS @ 2 km
Cumulative AA DPS at each family range threshold. Inner ranges stack the outer families, so a target closing the distance hits stronger AA bubbles as it crosses each band.
AA DPS at point-blank428
Sum of every family's average DPS, achievable only inside the closest-range family (2 km).
AA threat index1190
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)120,000
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: 4×2 102 mm (4/side) × 60/3 × 1500 = 120,000. Assumes every shell hits (real hit rate is lower; the Brawl matchup tool on the Compare page folds in dispersion + target armor).
Max HE alpha1500
Maximum HE damage per shell across secondary HE families. Best on this ship: 1500 from the 102 mm family.
Max HE fire chance6%
Maximum per-shell fire chance across secondary HE families (before target fire resistance is applied). Best on this ship: 6% from the 102 mm family.
Max HE pen17 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: 17 mm from the 102 mm family.
Damage Control Party
Repair Party
Sonar
Defensive AA Fire