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Osborne is a Tier VII American gunboat destroyer: her damage comes from sustained main battery pressure on caps and open-water trades. Torpedoes are a secondary threat for closing lanes, not her main damage. Standout traits: top-decile close-range AP pen in T7 DDs (253.8 mm) and best HE alpha in T7 DDs (2,200).
Hold mid-cap distance and lean into gunboat trades from cover where the peer destroyer cannot match your fires-per-minute. Avoid open-water duels with ships running smoke or radar; with no torpedoes the kit is gunfire, and gunfire from cover wins more than from blue water.
Your damage is sustained main-battery pressure from cover (the torpedoes are a secondary threat), so open-water duels just stack incoming HE on you while you fire back.
9 km range, 20 s duration. Detects all enemy ships within a fixed radius regardless of line-of-sight. Controls caps and punishes smoke-firing DDs.
253.8 mm AP pen at 1.5 km, top decile of T7 DDs. Citadels broadside cruisers up close.
2200.0 damage per HE shell, best of T7 DDs. Punishes superstructure and modules harder than peers.
60.0° AP min ricochet angle, best of T7 DDs. Larger impact-angle window where shells always penetrate.
67.5° AP guaranteed ricochet angle, best of T7 DDs. Auto-bounce kicks in later than peers'.
25000.0 damage per torpedo, best of T7 DDs.
Osborne is a Tech Tree ship. The normal acquisition path is researching and purchasing it in its nation/class line. Official source cards below may also show its temporary Early Access window before it became a normal Tech Tree unlock.
Pair with a commander whose unique skill complements her main armament; check the build tool for current recommendations.
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Where Osborne sits among Tier VII DDs (33 ships). Notable standouts are shown first; the rest of the cohort-ranked stats are in the expand below. Acquisition variants (Black Friday, Founders Edition) are counted once with their base ship, not as separate peers.
Not standouts for Osborne -- here's where she sits on every other ranked stat in the cohort. Stats tagged NORM are tied across more than half the cohort, so the value is the cohort default rather than a standout.
Damage Control Party∞ charges · 40 s reload · 5 s active
Smoke Generator2 charges · 240 s reload · 15 s emit / 124 s cloud activeAll values are ship base stats with modifications and upgrade changes denoted inline.
Numbers the spec table cannot show directly: alpha-strike math, DPM, dispersion, AP penetration. Click the formula chip on any row to reveal how it is calculated.
Shell grouping (sigma); shown in-game as Shell Grouping.Horizontal dispersion ellipse width at max range, from the verified WoWS dispersion model: $\sigma_H = \left(\dfrac{R}{30}\cdot\dfrac{\text{idealRadius}-\text{minRadius}}{\text{idealDistance}} + \text{minRadius}\right)\cdot 30$ $= \left(\dfrac{10180}{30}\cdot\dfrac{8-0.5}{1000} + 0.5\right)\cdot 30 = 91.3\,\text{m}$Vertical dispersion ellipse height at max range: $\sigma_V = \sigma_H \cdot \text{radiusOnMax}$ $= 91.3 \cdot 0.6 = 54.8\,\text{m}$50%-hit horizontal radius: $\sigma_{H,50} = \sigma_H \cdot \text{GetHalfHitsRatio}(\sigma)$ $= 91.3 \cdot 0.32\;(\sigma = 2) = 29.2\,\text{m}$50%-hit vertical radius: $\sigma_{V,50} = \sigma_V \cdot \text{GetHalfHitsRatio}(\sigma)$ $= 54.8 \cdot 0.319\;(\sigma = 2) = 17.5\,\text{m}$Canonical community AP formula (jcw780/wows_shell), evaluated at muzzle velocity: $P = 10^{-7}\cdot K \cdot m^{0.69} \cdot d^{-1.07} \cdot v_0^{1.38}$ $= 10^{-7}\cdot 3000 \cdot 34^{0.69} \cdot 0.137^{-1.07} \cdot 823^{1.38} = 302.6\,\text{mm}$. Matches the in-game spec card.Same formula at the ship's max firing range (14 km), where the shell has slowed to 294.2 m/s: $P = 10^{-7}\cdot 3000 \cdot 34^{0.69} \cdot 0.137^{-1.07} \cdot 294.2^{1.38} = 73.2\,\text{mm}$.23 mm ≈ 137 mm caliber / 6 (standard HE penetration ratio).floor(137 mm caliber / 14.3) = 9 mm (AP auto-penetrates plating this thick or less).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.All 4 barrels bear on the broadside.180 degrees / 12.5 deg/s traverse speed = 14.4 s.2,200 HE damage x 4 broadside guns = 8,800.3,400 AP damage x 4 broadside guns = 13,600.8,800 HE full-salvo alpha x 60 / 5.5 s base reload = 96,000.13,600 AP full-salvo alpha x 60 / 5.5 s base reload = 148,364.8,800 HE full-salvo alpha x 60 / 5 s installed reload (Main Battery Mod. 3 = -10%) = 105,600.13,600 AP full-salvo alpha x 60 / 5 s installed reload (Main Battery Mod. 3 = -10%) = 163,200.4 broadside guns x 60 / 5.5 s base reload = 43.6.4 broadside guns x 60 / 5 s installed Artillery reload = 48.4 HE shells x 60 / 5.5 s reload x 9% fire chance = 3.93.4 HE shells x 60 / 5 s installed reload x 9% fire chance = 4.32.detectability / (speed kt x 2.6 community game-speed factor).range / (speed kt x 2.6 community game-speed factor).1 launchers x 4 tubes.4 (centerline launchers train across - full salvo to either side).All tubes hitting one target: tubes x per-torpedo simulated damage = 4 x 25,000 = 100,000.One side firing, all torpedoes hitting: per-side tubes x per-torpedo simulated damage = 4 x 25,000 = 100,000.Sum across every AA aura on this ship of (aura.continuous_damage x 3.5 x aura.hit_probability). Here: (31×3.5×1) + (28×3.5×0.95) + (17×3.5×1) = 261. Covers AA-only mounts plus dual-purpose secondaries (Bismarck 105mm, USN 5"/38 cruiser secondaries) and dual-purpose main batteries (Sumner-class 5"/38, Akizuki-line 100mm). Formula validated against in-game captures on California, Sumner, Manfred von Richthofen, Dante Alighieri (exact) and within +/-17% on the remaining verified ships.Longest-reaching aura across AA-only + dual-purpose auras.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.Filtered to official World of Warships: Legends pages where this ship is a focus, reward, line member, or high-context variant mention.