Main battery formulas
Shell Grouping (σ)2
Max Horiz Disp95.6 m at 10.7 km
Horizontal dispersion ellipse width at max range, from the verified WoWS dispersion model:
Shell scatter width @ 5 km52.5 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 km90 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.
Max Vert Disp57.4 m at 10.7 km
Vertical dispersion ellipse height at max range:
Shell scatter height @ 10 km52.7 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 10747 m. Above the kink: , so .
Med Horiz Disp28.7 m at 10.7 km
50%-hit horizontal radius:
Med Vert Disp17.2 m at 10.7 km
50%-hit vertical radius:
AP Pen Close219 mm point-blank
Canonical community AP formula (jcw780/wows_shell), evaluated at muzzle velocity: . Matches the in-game spec card.
AP Pen Far46 mm at 10.7 km
Same formula at the ship's max firing range (10.7 km), where the shell has slowed to 295.5 m/s: .
AP pen 5 km101 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 km50 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.
HE flight time @ 10 km7.25 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 915 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 km7.25 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 915 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 penetration21 mm
21 mm ≈ 127 mm caliber / 6 (standard HE penetration ratio).
AP overmatch8 mm
floor(127 mm caliber / 14.3) = 8 mm (AP auto-penetrates plating this thick or less).
AP AOE Radius10
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 alpha5
All 5 barrels bear on the broadside.
Turret turn time15 s
180 degrees / 12 deg/s traverse speed = 15 s.
HE full-salvo alpha10,750
2,150 HE damage x 5 broadside guns = 10,750.
AP full-salvo alpha11,000
2,200 AP damage x 5 broadside guns = 11,000.
HE DPMInitial: 94,853 → 105,738
Zero upgrades: 10,750 HE full-salvo alpha x 60 / 6.8 s base reload = 94,853. All upgrades (Main Battery Mod. 3 = -10% reload): 10,750 HE full-salvo alpha x 60 / 6.1 s all-upgrades reload = 105,738.
AP DPMInitial: 97,059 → 108,197
Zero upgrades: 11,000 AP full-salvo alpha x 60 / 6.8 s base reload = 97,059. All upgrades (Main Battery Mod. 3 = -10% reload): 11,000 AP full-salvo alpha x 60 / 6.1 s all-upgrades reload = 108,197.
Shells/minInitial: 44.1 → 49.2
Zero upgrades: 5 broadside guns x 60 / 6.8 s base reload = 44.1. All upgrades (Main Battery Mod. 3 = -10% reload): 5 broadside guns x 60 / 6.1 s all-upgrades reload = 49.2.
Fires/minInitial: 3.97 → 4.43
Zero upgrades: 44.1 shells/min x 9% fire chance = 3.97. All upgrades (Main Battery Mod. 3 = -10% reload): 49.2 shells/min x 9% fire chance = 4.43.
Torpedoes
Torpedo detectability1.7 km
Estimated torpedo reaction time8.3 s
detectability / (speed kt x 2.6855 game-speed factor, m/s per knot, calibrated from in-game measurement; the community's traditional 2.6 reads about 3% slower).
Torpedo speed76 kt
Travel time to max range34.2 s
range / (speed kt x 2.6855 game-speed factor, m/s per knot, calibrated from in-game measurement).
Torpedo module damage1,500
Per-torpedo module/blast damage parameter from in-game data. Most torpedoes carry 500 to 2,000; ships announced by WG as dealing increased module damage carry 9,000 to 12,000, so their hits knock out engines, rudders, and turrets far more often. Comparative figure; the exact module-HP conversion is not published.
Tube count8
2 launchers x 4 tubes.
Per-side salvo8 torpedoes
8 (centerline launchers train across - full salvo to either side).
Full-salvo damage158,936
All tubes hitting one target: tubes x per-torpedo simulated damage = 8 x 19,867 = 158,936.
Per-side salvo damage158,936
One side firing, all torpedoes hitting: per-side tubes x per-torpedo simulated damage = 8 x 19,867 = 158,936.
Damage Control Party
Smoke Generator
Engine Boost
Torpedo Reload Booster