Main battery formulas
Shell Grouping (σ)2
Max Horiz Disp97.1 m
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 Disp58.2 m
Vertical dispersion ellipse height at max range:
Shell scatter height @ 10 km52.5 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 10941 m. Above the kink: , so .
Med Horiz Disp29.1 m
50%-hit horizontal radius:
Med Vert Disp17.5 m
50%-hit vertical radius:
AP Pen Close218 mm
Canonical community AP formula (jcw780/wows_shell), evaluated at muzzle velocity: . Matches the in-game spec card.
AP Pen Far44.1 mm
Same formula at the ship's max firing range (13.7 km), where the shell has slowed to 248.8 m/s: .
AP pen 5 km103 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 km51 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 km8.28 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 792 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 km8.17 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 792 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 alpha8
All 8 barrels bear on the broadside.
Turret turn time12.2 s
180 degrees / 14.7 deg/s traverse speed = 12.2 s.
HE full-salvo alpha14,400
1,800 HE damage x 8 broadside guns = 14,400.
AP full-salvo alpha16,800
2,100 AP damage x 8 broadside guns = 16,800.
HE DPMInitial: 144,000 → 160,000
Zero upgrades: 14,400 HE full-salvo alpha x 60 / 6 s base reload = 144,000. All upgrades (Main Battery Mod. 3 = -10% reload): 14,400 HE full-salvo alpha x 60 / 5.4 s all-upgrades reload = 160,000.
AP DPMInitial: 168,000 → 186,667
Zero upgrades: 16,800 AP full-salvo alpha x 60 / 6 s base reload = 168,000. All upgrades (Main Battery Mod. 3 = -10% reload): 16,800 AP full-salvo alpha x 60 / 5.4 s all-upgrades reload = 186,667.
Shells/minInitial: 80 → 88.9
Zero upgrades: 8 broadside guns x 60 / 6 s base reload = 80. All upgrades (Main Battery Mod. 3 = -10% reload): 8 broadside guns x 60 / 5.4 s all-upgrades reload = 88.9.
Fires/minInitial: 4 → 4.44
Zero upgrades: 80 shells/min x 5% fire chance = 4. All upgrades (Main Battery Mod. 3 = -10% reload): 88.9 shells/min x 5% fire chance = 4.44.
Torpedoes
Torpedo detectability1.2 km
Estimated torpedo reaction time7 s
detectability / (speed kt x 2.6 community game-speed factor).
Torpedo speed66 kt
Travel time to max range69.9 s
range / (speed kt x 2.6 community game-speed factor).
Tube count12
3 launchers x 4 tubes.
Per-side salvo12 torpedoes
12 (centerline launchers train across - full salvo to either side).
Full-salvo damage171,600
All tubes hitting one target: tubes x per-torpedo simulated damage = 12 x 14,300 = 171,600.
Per-side salvo damage171,600
One side firing, all torpedoes hitting: per-side tubes x per-torpedo simulated damage = 12 x 14,300 = 171,600.
Damage Control Party
Smoke Generator
Engine Boost