Main battery formulas
Shell Grouping (σ)2
Max Horiz Disp228.8 m at 16.9 km
Horizontal dispersion ellipse width at max range, from the verified WoWS dispersion model:
Shell scatter width @ 5 km110 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 km160 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 km210 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 Disp137.3 m at 16.9 km
Vertical dispersion ellipse height at max range:
Shell scatter height @ 10 km83 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 16880 m. Above the kink: , so .
Med Horiz Disp68.6 m at 16.9 km
50%-hit horizontal radius:
Med Vert Disp41.2 m at 16.9 km
50%-hit vertical radius:
AP Pen Close631.7 mm point-blank
Canonical community AP formula (jcw780/wows_shell), evaluated at muzzle velocity: . Matches the in-game spec card.
AP Pen Far327.5 mm at 16.9 km
Same formula at the ship's max firing range (16.9 km), where the shell has slowed to 537.4 m/s: .
AP pen 5 km513 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 km420 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 km349 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.
AP flight time @ 10 km4.88 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 865 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 km4.88 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 865 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 penetration76 mm
76 mm ≈ 305 mm caliber / 4 (improved HE penetration: German BBs, Yamato-class, and a handful of others).
Improved HE PenYes
This ship's HE shells use a 1/4 (~0.25) caliber-to-pen ratio instead of the standard 1/6 (~0.167) - 0.249 in this case. Lets HE pen ~76mm armor instead of ~50mm. Hits every German cruiser (150mm CL, 203mm CA) and BB (350mm+), British heavy cruisers / Lion / Nelson, a handful of other premiums.
AP overmatch21 mm
floor(305 mm caliber / 14.3) = 21 mm (AP auto-penetrates plating this thick or less).
AP AOE Radius90
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 alpha9
All 9 barrels bear on the broadside.
Turret turn time30 s
180 degrees / 6 deg/s traverse speed = 30 s.
HE full-salvo alpha32,400
3,600 HE damage x 9 broadside guns = 32,400.
AP full-salvo alpha84,600
9,400 AP damage x 9 broadside guns = 84,600.
HE DPMInitial: 97,200 → 108,000
Zero upgrades: 32,400 HE full-salvo alpha x 60 / 20 s base reload = 97,200. All upgrades (Main Battery Mod. 3 = -10% reload): 32,400 HE full-salvo alpha x 60 / 18 s all-upgrades reload = 108,000.
AP DPMInitial: 253,800 → 282,000
Zero upgrades: 84,600 AP full-salvo alpha x 60 / 20 s base reload = 253,800. All upgrades (Main Battery Mod. 3 = -10% reload): 84,600 AP full-salvo alpha x 60 / 18 s all-upgrades reload = 282,000.
Shells/minInitial: 27 → 30
Zero upgrades: 9 broadside guns x 60 / 20 s base reload = 27. All upgrades (Main Battery Mod. 3 = -10% reload): 9 broadside guns x 60 / 18 s all-upgrades reload = 30.
Fires/minInitial: 7.29 → 8.1
Zero upgrades: 27 shells/min x 27% fire chance = 7.29. All upgrades (Main Battery Mod. 3 = -10% reload): 30 shells/min x 27% fire chance = 8.1.
Torpedoes
Torpedo detectability1.3 km
Estimated torpedo reaction time7.6 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 speed64 kt
Travel time to max range34.9 s
range / (speed kt x 2.6855 game-speed factor, m/s per knot, calibrated from in-game measurement).
Torpedo module damage1,000
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 salvo4 torpedoes
tube count / 2 (symmetric port/starboard launcher layout; common on cruisers and battleships with deck torpedoes).
Full-salvo damage101,600
All tubes hitting one target: tubes x per-torpedo simulated damage = 8 x 12,700 = 101,600.
Per-side salvo damage50,800
One side firing, all torpedoes hitting: per-side tubes x per-torpedo simulated damage = 4 x 12,700 = 50,800.
Damage Control Party
Repair Party
Catapult Fighter
Observation Seaplane
Secondary Battery Booster
Sonar
