Main battery formulas
Shell Grouping (σ)1.7
Max Horiz Disp185.8 m at 16.4 km
Horizontal dispersion ellipse width at max range, from the verified WoWS dispersion model:
Shell scatter width @ 5 km90 m
Horizontal scatter at a fixed 5 km, from the same verified dispersion model as the rows below - a knife-fight-range anchor comparable across ships.
Shell scatter width @ 10 km132 m
How wide your shells scatter at 10 km, from the same dispersion model as the max-range figure above. Picking a fixed range makes this number directly comparable from ship to ship: max-range dispersion makes a longer-range gun look worse even when it's tighter at any common range. The interactive Dispersion tab on the Charts card plots the full curve from 0 to max range.
Shell scatter width @ 15 km174 m
Horizontal scatter at a fixed 15 km, from the same verified dispersion model - the long-range anchor. Only shown when the ship's guns reach 15 km.
Max Vert Disp111.5 m at 16.4 km
Vertical dispersion ellipse height at max range:
Shell scatter height @ 10 km68.9 m
How tall the same scatter ellipse is at 10 km. Comparable from ship to ship for the same reason as the width value above. The height/width ratio is a piecewise-linear curve through three points from the ship's own dispersion data: at 0 m, at m, and at 16400 m. Above the kink: , so .
Med Horiz Disp65.6 m at 16.4 km
50%-hit horizontal radius:
Med Vert Disp39.3 m at 16.4 km
50%-hit vertical radius:
AP Pen Close707.5 mm point-blank
Canonical community AP formula (jcw780/wows_shell), evaluated at muzzle velocity: . Matches the in-game spec card.
AP Pen Far317.8 mm at 16.4 km
Same formula at the ship's max firing range (16.4 km), where the shell has slowed to 464.8 m/s: .
AP pen 5 km543 mm
AP penetration at a fixed 5 km, read off the same PC-validated ballistic curve as AP Pen Close/Far: the shell's impact velocity at that range fed through the canonical community AP formula . Fixed anchors make ships directly comparable at the same fighting distance; the Charts card plots the full curve.
AP pen 10 km421 mm
AP penetration at a fixed 10 km, read off the same PC-validated ballistic curve as AP Pen Close/Far: the shell's impact velocity at that range fed through the canonical community AP formula . Fixed anchors make ships directly comparable at the same fighting distance; the Charts card plots the full curve.
AP pen 15 km336 mm
AP penetration at a fixed 15 km, read off the same PC-validated ballistic curve as AP Pen Close/Far: the shell's impact velocity at that range fed through the canonical community AP formula . Fixed anchors make ships directly comparable at the same fighting distance; the Charts card plots the full curve.
HE flight time @ 10 km5.31 s
How long an HE shell takes to reach a target at a fixed 10 km, from the same numerically integrated trajectory the Charts card plots. The shell slows under quadratic air drag, , where is air density from a standard-atmosphere profile and bundles the shell's drag coefficient, caliber and mass: . That runs from a 830 m/s muzzle velocity in 0.02 s steps under gravity 9.8 m/s² until the shell lands, then divides by 2.77: the game clock runs faster than real time, and that factor was measured against stopwatch runs in the Training Room. Lower is better, since a faster shell is harder to dodge and needs less lead.
AP flight time @ 10 km5.31 s
How long an AP shell takes to reach a target at a fixed 10 km, from the same numerically integrated trajectory the Charts card plots. The shell slows under quadratic air drag, , where is air density from a standard-atmosphere profile and bundles the shell's drag coefficient, caliber and mass: . That runs from a 830 m/s muzzle velocity in 0.02 s steps under gravity 9.8 m/s² until the shell lands, then divides by 2.77: the game clock runs faster than real time, and that factor was measured against stopwatch runs in the Training Room. Lower is better, since a faster shell is harder to dodge and needs less lead.
HE penetration55 mm
In-game data: 55 mm = 320 mm caliber / 5.82 (non-standard HE penetration ratio).
AP overmatch22 mm
floor(320 mm caliber / 14.3) = 22 mm (AP auto-penetrates plating this thick or less).
AP AOE Radius55
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 alpha10
All 10 barrels bear on the broadside.
Turret turn time36 s
180 degrees / 5 deg/s traverse speed = 36 s.
HE full-salvo alpha48,000
4,800 HE damage x 10 broadside guns = 48,000.
AP full-salvo alpha97,000
9,700 AP damage x 10 broadside guns = 97,000.
HE DPM96,000
48,000 HE full-salvo alpha x 60 / 30 s base reload = 96,000.
AP DPM194,000
97,000 AP full-salvo alpha x 60 / 30 s base reload = 194,000.
Shells/min20
10 broadside guns x 60 / 30 s base reload = 20.
Fires/min7
20 shells/min x 35% fire chance = 7.
AA defense
AA DPS at max range21
Only families that reach 4 km contribute at the outer edge of the AA bubble. In-game families: 37mm70K 2x1 -> 18 DPS @ 3.2 km; 37mm70K 4x1 -> 37 DPS @ 3.2 km; 37mm 67 V21 6x2 -> 87 DPS @ 3.5 km; 100mm 50 Minizini 4x2 -> 21 DPS @ 4 km.
Maximum AA range4 km
Longest-reaching family on the in-game AA card. Base AirDefense aura max range is 3.5 km; dual-purpose mount auras extend it.
AA DPS layered by range21 DPS @ 4 km, 108 DPS @ 3.5 km, 163 DPS @ 3.2 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-blank163
Sum of every family's average DPS, achievable only inside the closest-range family (3.2 km).
AA threat index564
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.
Damage Control Party
Repair Party
Secondary Battery Booster