Main battery formulas
Shell Grouping (σ)2
Max Horiz Disp100.4 m at 11.4 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 Disp60.2 m at 11.4 km
Vertical dispersion ellipse height at max range:
Shell scatter height @ 10 km51.8 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 11388 m. Above the kink: , so .
Med Horiz Disp30.1 m at 11.4 km
50%-hit horizontal radius:
Med Vert Disp18.1 m at 11.4 km
50%-hit vertical radius:
AP Pen Close199.9 mm point-blank
Canonical community AP formula (jcw780/wows_shell), evaluated at muzzle velocity: . Matches the in-game spec card.
AP Pen Far58.7 mm at 11.4 km
Same formula at the ship's max firing range (11.4 km), where the shell has slowed to 360.2 m/s: .
AP pen 5 km113 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 km67 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 flight time @ 10 km6.39 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 875 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 flight time @ 10 km6.23 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 875 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 penetration23 mm
23 mm ≈ 135 mm caliber / 6 (standard HE penetration ratio).
AP overmatch9 mm
floor(135 mm caliber / 14.3) = 9 mm (AP auto-penetrates plating this thick or less).
AP AOE Radius12
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.
SAP Fragment Radius12 (top hull)
SAP shell fragment splash radius; the area over which a SAP hit scatters fragment damage. Scales with shell mass (90mm ~ 5, 203mm CA ~ 20-30, 320mm = 175, 406mm = 250, 457mm = 400, max) and is tuned per ship, so two ships with the same SAP caliber can differ (135mm ranges 5-24). Larger value = wider fragment spread per hit.
Broadside guns used for alpha8
All 8 barrels bear on the broadside.
Turret turn time18 s
180 degrees / 10 deg/s traverse speed = 18 s.
HE full-salvo alpha15,600
1,950 HE damage x 8 broadside guns = 15,600.
AP full-salvo alpha24,000
3,000 AP damage x 8 broadside guns = 24,000.
HE DPMInitial: 87,477 → 86,667
Zero upgrades: 15,600 HE full-salvo alpha x 60 / 10.7 s base reload = 87,477. All upgrades (top gun + Main Battery Mod. 3 = -10% reload): 15,600 HE full-salvo alpha x 60 / 10.8 s all-upgrades reload = 86,667.
AP DPMInitial: 134,579 → 133,333
Zero upgrades: 24,000 AP full-salvo alpha x 60 / 10.7 s base reload = 134,579. All upgrades (top gun + Main Battery Mod. 3 = -10% reload): 24,000 AP full-salvo alpha x 60 / 10.8 s all-upgrades reload = 133,333.
Shells/minInitial: 44.9 → 44.4
Zero upgrades: 8 broadside guns x 60 / 10.7 s base reload = 44.9. All upgrades (top gun + Main Battery Mod. 3 = -10% reload): 8 broadside guns x 60 / 10.8 s all-upgrades reload = 44.4.
Fires/minInitial: 4.04 → 4
Zero upgrades: 44.9 shells/min x 9% fire chance = 4.04. All upgrades (top gun + Main Battery Mod. 3 = -10% reload): 44.4 shells/min x 9% fire chance = 4.
Torpedoes
Torpedo detectability1.7 km
Estimated torpedo reaction time9.4 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 speed67 kt
Travel time to max range33.3 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 count12
3 launchers x 4 tubes.
Per-side salvo12 torpedoes
12 (centerline launchers train across - full salvo to either side).
Full-salvo damage267,204
All tubes hitting one target: tubes x per-torpedo simulated damage = 12 x 22,267 = 267,204.
Per-side salvo damage267,204
One side firing, all torpedoes hitting: per-side tubes x per-torpedo simulated damage = 12 x 22,267 = 267,204.
Damage Control Party
Smoke Generator
Exhaust Smoke Generator
Engine Boost
Defensive AA Fire