GamingDiver / WoWs Legends Ships / Osborne

World of Warships: Legends ship guide

Osborne

Also called: 奥斯本 Beta

U.S.A. · Tier VII · Destroyer · Tech Tree: Recon Destroyers

Advanced Radar destroyerAdvanced Radar plus heavy guns; own the cap from inside your own detection.

Playstyle

Hold a flank position your team can rotate behind, not a center lane your team has to defend you in
Avoid: Idling beam-on in an obvious torpedo lane

Key characteristics

Heavy torpedoesHeavy HE shellsLRS Radar 9.0kmWide always-pen zoneDefensive AAClose-range AP brick

On this page

Community stats
Playstyle
How to get Osborne
Builds
Cohort position
Stats and specs
Armor
Charts
Exteriors

Community Data

Osborne Community Stats

Log in to GamingDiver and upload your data to see Community Data for Osborne: community win rate, damage, survival, spotting, and your own comparison.

Playstyle

Overview

Osborne is a Tier VII American super-radar destroyer (9 km) and an equal 9 km torpedo-detection radius so the same scan that lights an enemy DD also paints incoming torps. The kit isn't stealth-and-ambush -- the radar IS the kit; she takes caps by lighting up the contest from inside her own scan, not by sneaking in under detection. Standout traits: top-decile close-range AP pen in T7 DDs (264 mm) and best HE alpha in T7 DDs (2,200).

Positioning

Hold a flank position your team can rotate behind, not a center lane your team has to defend you in. Your guns lose penetration at range, so aim AP at broadsides you can still citadel and put HE into superstructures and upper-hull sections, rather than the bow-in or belt armor your shells bounce and shatter on.

Potato Avoidance

Idling beam-on in an obvious torpedo lane

Unspotted is not unseen: once the enemy has reason to think a destroyer is holding this cap they will put torpedoes into the water you are probably in, and one fish the size of your own (25,000 damage against 18,600 HP) is more than your whole health bar. Keep way on, cross lanes bow or stern first, and never sit still beam-on to a chokepoint you would torpedo yourself.

Signature Traits

Surveillance Radar

9 km range, 12 s duration. Detects all enemy ships within a fixed radius regardless of line-of-sight. Controls caps and punishes smoke-firing DDs.

ELITE MAIN BATTERY ↗

Close-range AP brick · 264 mm
Heavy HE shells · 2200 damage
Wide always-pen zone · 60°
Late auto-bounce · 67.5°
Flat AP shells · 930 m

Heavy torpedoes ↗

25000 damage per torpedo, best of T7 DDs.

Lingering smoke ↗

124 s smoke cloud linger, best of T7 DDs. Each puff stays up longer after you stop laying it, holding the shield.

Acquisition

How to get Osborne

Osborne is available in the Recon Destroyers branch of the U.S.A. Tech Tree for 18,000,000 credits after researching it in the branch. Known module upgrades cost up to 4,500,000 credits. Official source cards below may also show its temporary Early Access window before it became a normal Tech Tree unlock. Container chances are shown as the listed odds of receiving this exact ship, dividing grouped ship-pool odds across the resolved ships and including nested container paths when a crate can drop another crate.

Show U.S.A. tech-tree branch diagram

U.S.A. Tech Tree

Osborne sits in the Recon Destroyers branch. The highlighted path shows the local branch context inside the full U.S.A. tree.

4 ships in highlighted branch · scroll to inspect all U.S.A. lines.

U.S.A.IIIIIIIVVVIVIIVIII★

Destroyer

Destroyer Split

Cruiser

Light Cruiser Split

Battleship

Alternative Battleship

Hybrid Battleship

Carrier

Tier ★LouisianaPASB210 Tier VIIISeattlePASC209 Tier VIIIDelawarePASB209 Tier VIIClevelandPASC208 Tier VIINebraskaPASB208 Tier VIHelenaPASC207 Tier VIConnecticutPASB207 Tier VDallasPASC206 Tier VIIIMainePASB118 Tier VIIIAllen M. SumnerPASD114 Tier VIIIBuffaloPASC109 Tier VIIIMinnesotaPASB109 Tier VIIKansasPASB108 Tier VIILexingtonPASA108 Tier VTennesseePASB106 Tier IVNevadaPASB105 Tier VIIIChristopherPASD039 Tier VIIOsbornePASD038 Tier VIHughesPASD037 Tier VKanePASD036 Tier VNew MexicoPASB034 Tier IIWickesPASD027 Tier IIIPhoenixPASC024 Tier VIIFletcherPASD021 Tier ★Des MoinesPASC020 Tier IIIClemsonPASD019 Tier VIIIowaPASB018 Tier VIIBaltimorePASC017 Tier ★MontanaPASB017 Tier ★WorcesterPASC016 Tier VINew OrleansPASC014 Tier ★GearingPASD013 Tier VPensacolaPASC012 Tier VINorth CarolinaPASB012 Tier VRangerPASA010 Tier VIBensonPASD008 Tier VIColoradoPASB008 Tier VMahanPASD006 Tier IVNew YorkPASB006 Tier IVFarragutPASD005 Tier IVOmahaPASC005 Tier IISt. LouisPASC004 Tier IIIWyomingPASB004 Tier IIILangleyPASA004 Tier IAlbanyPASC003

Best listed chance for this ship

Anniversary '26 U.S. crate 1% VII Osborne New · Anniversary '26 U.S. crate
U.S. Alt. Destroyer crate 1% VII Osborne Early access · U.S. Alt. Destroyer crate

Official WG availability sources

Official WoWS Legends container odds Containers Official container drop rows linked below include direct and nested effective ship odds.

Show direct source rows

Anniversary '26 U.S. crate 1% · VII Osborne
U.S. Alt. Destroyer crate 1% · VII Osborne

Want the full picture? Each container page charts the odds as you open more crates - including ~~pity~~ guaranteed-reward timers and, for Fleet Members, pack math personalized to your port.

Builds

Pair with a commander whose unique skill complements her main armament; check the build tool for current recommendations.

Open in Build Tool →

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Cohort position

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Where Osborne sits among Tier VII DDs (40 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.

BestHE shell damage2,200 (1 of 4 tied) BestAP ricochet start60° (1 of 6 tied) BestAP auto-bounce angle67.5° (1 of 6 tied) BestTorpedo damage≈25,000 (1/37) Top 10%Main dispersion74.7 m (3/36) Top 10%AP velocity930 m/s (3/33) Top 25%Main battery caliber137 mm (9/36) Top 25%Main battery range11.2 km (7/36) Top 25%AP shell damage3,400 (5/33) Top 25%AP pen at 10 km106 mm (5/32) Top 25%AA DPS262 (6/41) Top 25%AA range5 km (11/41) Top 25%AA threat868 (10/41) Top 25%Torpedo reload75 s (5/37) Bottom 25%AP arming threshold23 mm (27/33) Bottom 10%Torpedo speed42 kt (36/37) WorstNo secondaries (34 of 41 in cohort)

See 27 mid-pack stats

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.

Hit points18,600 HP(17/41) Max speed35 kt(29/41) Concealment7.12 km(30/41) Air detection3.56 km(29/41) Rudder shift4.2 s(31/41) Traverse-to-turn ratio7.63 ×(19/36) Main battery reload4.5 s(23/36) HE fire chance9%(11/35) Fires per minute4.8(22/35) HE DPM117,333(25/35) AP DPM181,333(21/33) HE velocity823 m/s(27/35) Acceleration16.7 s(12/41) Engine power65,000 hp(13/41) Turn-speed retention103.2 hp/m(13/41) Displacement3,200 t(25/41) Power-to-weight20.31 hp/t(16/41) Effective HE DPM (incl. fire)152,938(26/35) Flak per wave (expected)920(12/16) Torpedo range9 km(20/37) Max armor20 mm(26/41) Citadel belt20 mm(25/41) Bow armor19 mm(21/41) Stern armor19 mm(22/41) Deck armor19 mm(17/34) NormAP fuse timer0.01 s(26 of 33 tied at this value) NormTurn speed retained81%(39 of 41 tied at this value)

Peers in this cohort

Compare Tier VII Destroyers

Show all 39 peers

Gustav Julius Maerker

Stats & specs

Customize in the Build Tool →

Survivability

Hit PointsInitial: 17,100 → 18,600

Displacement3,200 t

Armor range13–20 mm

Plate armor thicknesses13, 19, 20 mm

Armor material/layer entries20

Fire resistanceInitial: 33.3% → 36.6%

Fire duration30 s

Torp Reduction0%

Steering gear HP

Durability of the steering gears. As this pool drops, hits are likelier to jam the rudder; unlike most modules the steering can be knocked out and repaired but is never permanently destroyed.

5,600

Repairable: penetration50%

Repairable: steering gear50%

Main Battery

These main guns are dual-purpose: they also fire at aircraft and feed the AA Defense card.

ModuleArtillery: 4×137 mm

Mounts / barrels4 mounts / 4 barrels

Reload timeInitial: 5.5 s → 5 s

Firing range (base)10.2 km

Firing range (top fire control)11.2 km

Turret traverseInitial: 12.5 °/s → 14 °/s

Turret armor25 mm

HE fire DPM vs T7 BB32045

Effective HE DPM vs T7 BB137645

Shell Grouping (σ)2

Max Horiz Disp

Horizontal dispersion ellipse width at max range, from the verified WoWS dispersion model:

σ_{H} = (\frac{R}{30} \cdot \frac{idealRadius - minRadius}{idealDistance} + minRadius) \cdot 30

= (\frac{11198}{30} \cdot \frac{6 - 0.4}{1000} + 0.4) \cdot 30 = 74.7 m

74.7 m

Max Vert Disp

Vertical dispersion ellipse height at max range:

σ_{V} = σ_{H} \cdot radiusOnMax

= 74.7 \cdot 0.6 = 44.8 m

44.8 m

Med Horiz Disp

50%-hit horizontal radius:

σ_{H, 50} = σ_{H} \cdot \frac{0.6}{σ}

= 74.7 \cdot \frac{0.6}{2} = 22.4 m

22.4 m

Med Vert Disp

50%-hit vertical radius:

σ_{V, 50} = σ_{V} \cdot \frac{0.6}{σ}

= 44.8 \cdot \frac{0.6}{2} = 13.4 m

13.4 m

Turret turn time

180 degrees / 12.5 deg/s traverse speed = 14.4 s.

14.4 s

Shells/min

Zero upgrades: 4 broadside guns x 60 / 5.5 s base reload = 43.6. All upgrades (top gun + Main Battery Mod. 3 = -10% reload): 4 broadside guns x 60 / 4.5 s all-upgrades reload = 53.3.

Initial: 43.6 → 53.3

HE shells

HE Damage2,200

HE Velocity823 m/s

Fire Chance9%

HE penetration

23 mm ≈ 137 mm caliber / 6 (standard HE penetration ratio).

23 mm

HE full-salvo alpha

2,200 HE damage x 4 broadside guns = 8,800.

8,800

HE DPM

Zero upgrades: 8,800 HE full-salvo alpha x 60 / 5.5 s base reload = 96,000. All upgrades (top gun + Main Battery Mod. 3 = -10% reload): 8,800 HE full-salvo alpha x 60 / 4.5 s all-upgrades reload = 117,333.

Initial: 96,000 → 117,333

Fires/min

Zero upgrades: 43.6 shells/min x 9% fire chance = 3.93. All upgrades (top gun + Main Battery Mod. 3 = -10% reload): 53.3 shells/min x 9% fire chance = 4.8.

Initial: 3.93 → 4.8

AP shells

AP Damage3,400

AP Velocity930 m/s

Min Ricochet60 deg

Guaranteed Ricochet67.5 deg

Fuse Timer0.01 s

Fuse Threshold23 mm

AP overmatch

floor(137 mm caliber / 14.3) = 9 mm (AP auto-penetrates plating this thick or less).

9 mm

AP Pen Close

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 2600 \cdot 34^{0.69} \cdot {0.137}^{- 1.07} \cdot 930^{1.38} = 310.4 mm

. Matches the in-game spec card.

310.4 mm

AP Pen Far

Same formula at the ship's max firing range (14 km), where the shell has slowed to 342.3 m/s:

P = 10^{- 7} \cdot 2600 \cdot 34^{0.69} \cdot {0.137}^{- 1.07} \cdot {342.3}^{1.38} = 78.1 mm

78.1 mm

AP full-salvo alpha

3,400 AP damage x 4 broadside guns = 13,600.

13,600

AP DPM

Zero upgrades: 13,600 AP full-salvo alpha x 60 / 5.5 s base reload = 148,364. All upgrades (top gun + Main Battery Mod. 3 = -10% reload): 13,600 AP full-salvo alpha x 60 / 4.5 s all-upgrades reload = 181,333.

Initial: 148,364 → 181,333

AP AOE Radius

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.

Torpedoes

ModuleTorpedoes: 533 mm Mk14

Launchers / tubes1 launchers × 4 tubes = 4 tubes

Reload time75 s

Projectile speed42 kt

Range9 km

Maximum simulated damage

Estimate of WG's in-game value; matches the in-game port screen within ±5%. Saturation: most targets only intersect one hull section, so the sim transfers ~1/3 of the warhead alpha (2/3 when the warhead blast >= 5000 and the burst reaches a second section). For this ship:

D_{sim} = α \cdot c = 37, 500 \cdot 0.667 = 25, 000

≈ 25,000

Maximum damage (ammunition)

The ammunition card's 'Maximum Damage' stat, exact: warhead alpha / 3 plus the blast addend. This is the per-torpedo number most references quote; the 'Maximum simulated damage' row above is WG's separate geometry-sim stat from the launcher spec panel.

22,500

Torpedo detectability0.9 km

Reaction time

How long a target has to dodge after your torpedo is spotted at its detectability range (lower means less warning):

t_{react} = \frac{0.9 km}{42 kt \times 2.6} = 8.2 s

, equivalently

5000 \times detectability / (13 \times speed)

. Base value; commander torpedo-concealment skills lower it further. Community torpedo-reaction calculator by u/LorenDovah and u/The_ColorOutofSpace.

8.2 s

Flooding chance

Read straight from the game's own data: this torpedo carries a flooding-chance value of 2.59 per hit, shown as

2.59 \times 100 = 259 %

. Torpedo flood values above 100% are normal: in battle the base chance is scaled down by the target's torpedo protection (the Torp Reduction stat on its Survivability card) and any flood-resistance modifiers, so a value above 100% keeps flooding likely even through partial protection. Not shown on the in-game port screen.

259%

Torpedo launcher traverse25 °/s

Torp Turn

Time to rotate the launchers 180 deg:

t_{turn} = \frac{180 °}{25 ° / s} = 7.2 s

7.2 s

Torp Arming259 m

Per-side salvo damage

One side firing, all torpedoes hitting: per-side tubes x per-torpedo simulated damage = 4 x 25,000 = 100,000.

100,000

AA Defense

AA mount points12

Maximum AA range

Longest-reaching family on the in-game AA card. Base AirDefense aura max range is 3.5 km; dual-purpose mount auras extend it.

5 km

40 mm Bofors Mk1Initial: 3×2 → 5×2 40mm

20 mm Oerlikon Mk20Initial: 9×2 → 7×2 20mm

Gunsmain battery (DP)

Continuous DPS

Effective DPS in in-game units (raw aura damage × 3.5 × hit probability, summed per contributing aura) - matches the Close-range AA DPS headline's currency. Includes 60 from dual-purpose main battery firing as AA in this range band.

Range5 km

Guns40 mm Bofors Mk1

Continuous DPS

Effective DPS: 31 raw aura damage × 3.5 × 1 hit probability = 108 - the same in-game units as the Close-range AA DPS headline.

Initial: 66 → 108

Range3.5 km

Total DPS in Aura

Far 60 + Medium 108 = 168

168

Guns20 mm Oerlikon Mk20

Continuous DPS

Effective DPS: 28 raw aura damage × 3.5 × 0.95 hit probability = 93 - the same in-game units as the Close-range AA DPS headline.

Initial: 123 → 93

Range2 km

Total DPS in Aura

Far 60 + Medium 108 + Near 93 = 261

261

Bursts

Each ~2 s wave fires 2 quick salvos of 2 clouds ahead of the attacking squadron - up to 4 clouds per wave × 230 damage each. Planes that fly into a cloud take its damage; clouds dissipate before the next wave lands. Defensive AA Fire, where fitted, multiplies the salvo repeats within each wave.

2 salvos × 2 clouds

Cloud damage

Damage a plane takes for flying into one flak cloud, before any reductions.

230

Cloud spawn chance

Every potential cloud spawns - the full pattern, every wave. Often called flak 'hit chance', but spawned clouds always damage planes that fly into them - the roll is on spawning.

100%

Wave rate

A flak wave spawns roughly every 2 s - timed frame-by-frame from gameplay footage and consistent across ships.

every ~2 s

Fired by

Flak keeps firing while at least one main battery mount is operational - even losing every other AA mount does not stop it.

Main battery

Flak zone

The activation band: flak fires while attacking planes are inside it. Clouds are placed ahead of the planes' path, so bursts can land short of 2.5 km or past 5 km - once planes get inside the band, new waves stop.

2.5-5 km

See the AA layers diagram ↓

Maneuverability

Engine power65,000 hp

Maximum speed35 kt

Turning circle radius630 m

Rudder shift time4.2 s

Engine power-boost threshold7 kt

Engine spool-up time7.7 s

Reverse spool-up time3.8 s

Acceleration 0-90%

Time to reach 90% of top speed (31.5 kt of 35 kt), from our in-house acceleration model.

16.7 s

Acceleration 0-99%

Time to reach 99% of top speed (34.6 kt of 35 kt). 99% rather than 100% because true top speed is asymptotic (thrust meets drag), so the last fraction of a knot is never quite gained.

28.3 s

Traverse-to-turn ratio

How many degrees the turret can swing for each degree the hull turns. Turn rate

ω_{hull} = \frac{180}{π} \cdot \frac{V_{max} (m/s)}{R_{turn}} = \frac{180}{π} \cdot \frac{35.0 \cdot 0.5144}{630} = 1.64 ° / s

, so

ratio = \frac{ω_{turret}}{ω_{hull}} = \frac{12.5}{1.64} = 7.6 \times

. Below 5 the turrets drag in a turning fight; 25+ keeps up with any rudder.

7.6× ok

See the full acceleration curve ↓

Concealment

Detectability by sea7.12 km

Detectability by air3.56 km

Smoke firing penalty2.83 km

Detect after firing main guns

max(base sea detectability, gun-firing bloom range). Firing never pulls your detection closer than base concealment.

7.12 km

Detect Fire Sea9.12 km

Detect Fire Air6.56 km

Guaranteed Detect2 km

✦

Consumables

Damage Control Party∞ charges · 40 s reload · 5 s active

Smoke Generator2 charges · 240 s reload · 28 s emit / 124 s cloud active · 450 m radius

Long-Range Surveillance Radar3 charges · 120 s reload · 12 s active · 9 km radar range
ƒ
Derived from the consumable's 30 m grid-unit range (km = grid units x 30 / 1000): $\frac{300 \times 30}{1000} = 9 km$
· 9 km torpedo detect
ƒ
Derived from the consumable's 30 m grid-unit range (km = grid units x 30 / 1000): $\frac{300 \times 30}{1000} = 9 km$
· 18°/s passive sweep
ƒ
The passive radar beam rotates at 18°/s -- one full Minimap rotation every ~20 s (measured from community gameplay footage).
· 2.5 s blip duration
ƒ
A ship caught by the passive sweep stays marked on the Minimap for about 2.5 s after the beam passes (community hand-timed).

Defensive AA Fire3 charges · 140 s reload · 25 s active · ×2 flak burst boost
ƒ
Repeats the flak burst pattern ×2 within each wave - more clouds in the air over the wave, at the same spots.

Module options (3)

Stats above use the fully-upgraded modules. These are the research-tree alternatives; trade-offs are flagged.

HullUpgrade

Hit points17,100 → 18,600
Rudder shift7.6 → 5.4 s
Close-range AA DPS56 → 59
Turret traverse12.5 → 14 °/s

Fire controlUpgrade

Main battery range10,180 → 11,198 m

ArtilleryUpgrade

Base reload5.5 → 5 s

See all derived stats

Show ▾

All 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.

Main battery formulas

Shell Grouping (σ)2

Max Horiz Disp74.7 m

Horizontal dispersion ellipse width at max range, from the verified WoWS dispersion model:  $σ_{H} = (\frac{R}{30} \cdot \frac{idealRadius - minRadius}{idealDistance} + minRadius) \cdot 30$   $= (\frac{11198}{30} \cdot \frac{6 - 0.4}{1000} + 0.4) \cdot 30 = 74.7 m$

Shell scatter width @ 5 km40 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 km68 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 Disp44.8 m

Vertical dispersion ellipse height at max range: $σ_{V} = σ_{H} \cdot radiusOnMax$ $= 74.7 \cdot 0.6 = 44.8 m$

Shell scatter height @ 10 km39.3 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:  $radiusOnZero = 0.2$  at 0 m,  $radiusOnDelim = 0.5$  at  $delim \cdot R_{m a x} = 0.5 \cdot 11198 = 5599$  m, and  $radiusOnMax = 0.6$  at 11198 m. Above the kink:  $k = 0.5 + (0.6 - 0.5) \cdot \frac{10000 - 5599}{11198 - 5599} = 0.5786$ , so  $σ_{V} = σ_{H} \cdot k = 68 \cdot 0.5786 = 39.3 m$ .

Med Horiz Disp22.4 m

50%-hit horizontal radius: $σ_{H, 50} = σ_{H} \cdot \frac{0.6}{σ}$ $= 74.7 \cdot \frac{0.6}{2} = 22.4 m$

Med Vert Disp13.4 m

50%-hit vertical radius: $σ_{V, 50} = σ_{V} \cdot \frac{0.6}{σ}$ $= 44.8 \cdot \frac{0.6}{2} = 13.4 m$

AP Pen Close310.4 mm

Canonical community AP formula (jcw780/wows_shell), evaluated at muzzle velocity:  $P = 10^{- 7} \cdot K \cdot m^{0.69} \cdot d^{- 1.07} \cdot v_{0}^{1.38}$   $= 10^{- 7} \cdot 2600 \cdot 34^{0.69} \cdot {0.137}^{- 1.07} \cdot 930^{1.38} = 310.4 mm$ . Matches the in-game spec card.

AP Pen Far78.1 mm

Same formula at the ship's max firing range (14 km), where the shell has slowed to 342.3 m/s:  $P = 10^{- 7} \cdot 2600 \cdot 34^{0.69} \cdot {0.137}^{- 1.07} \cdot {342.3}^{1.38} = 78.1 mm$ .

AP pen 5 km182 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  $P = 10^{- 7} \cdot K \cdot m^{0.69} \cdot d^{- 1.07} \cdot v^{1.38}$ . Fixed anchors make ships directly comparable at the same fighting distance; the Charts card plots the full curve.

AP pen 10 km106 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  $P = 10^{- 7} \cdot K \cdot m^{0.69} \cdot d^{- 1.07} \cdot v^{1.38}$ . Fixed anchors make ships directly comparable at the same fighting distance; the Charts card plots the full curve.

HE flight time @ 10 km6.11 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,  $a_{drag} = k ρ v^{2}$ , where  $ρ$  is air density from a standard-atmosphere profile and  $k$  bundles the shell's drag coefficient, caliber and mass:  $k = \frac{π C_{d} d^{2}}{8 m} = \frac{π \cdot 0.2377 \cdot {0.137}^{2}}{8 \cdot 34} = 5.15 \times 10^{- 5}$ . That runs from a 823 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 km5.87 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,  $a_{drag} = k ρ v^{2}$ , where  $ρ$  is air density from a standard-atmosphere profile and  $k$  bundles the shell's drag coefficient, caliber and mass:  $k = \frac{π C_{d} d^{2}}{8 m} = \frac{π \cdot 0.2941 \cdot {0.137}^{2}}{8 \cdot 34} = 6.38 \times 10^{- 5}$ . That runs from a 930 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 ≈ 137 mm caliber / 6 (standard HE penetration ratio).

AP overmatch9 mm

floor(137 mm caliber / 14.3) = 9 mm (AP auto-penetrates plating this thick or less).

AP AOE Radius16

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 alpha4

All 4 barrels bear on the broadside.

Turret turn time14.4 s

180 degrees / 12.5 deg/s traverse speed = 14.4 s.

HE full-salvo alpha8,800

2,200 HE damage x 4 broadside guns = 8,800.

AP full-salvo alpha13,600

3,400 AP damage x 4 broadside guns = 13,600.

HE DPMInitial: 96,000 → 117,333

Zero upgrades: 8,800 HE full-salvo alpha x 60 / 5.5 s base reload = 96,000. All upgrades (top gun + Main Battery Mod. 3 = -10% reload): 8,800 HE full-salvo alpha x 60 / 4.5 s all-upgrades reload = 117,333.

AP DPMInitial: 148,364 → 181,333

Zero upgrades: 13,600 AP full-salvo alpha x 60 / 5.5 s base reload = 148,364. All upgrades (top gun + Main Battery Mod. 3 = -10% reload): 13,600 AP full-salvo alpha x 60 / 4.5 s all-upgrades reload = 181,333.

Shells/minInitial: 43.6 → 53.3

Zero upgrades: 4 broadside guns x 60 / 5.5 s base reload = 43.6. All upgrades (top gun + Main Battery Mod. 3 = -10% reload): 4 broadside guns x 60 / 4.5 s all-upgrades reload = 53.3.

Fires/minInitial: 3.93 → 4.8

Zero upgrades: 43.6 shells/min x 9% fire chance = 3.93. All upgrades (top gun + Main Battery Mod. 3 = -10% reload): 53.3 shells/min x 9% fire chance = 4.8.

Torpedoes

Torpedo detectability0.9 km

Estimated torpedo reaction time8.2 s

detectability / (speed kt x 2.6 community game-speed factor).

Torpedo speed42 kt

Travel time to max range82.4 s

range / (speed kt x 2.6 community game-speed factor).

Tube count4

1 launchers x 4 tubes.

Per-side salvo4 torpedoes

4 (centerline launchers train across - full salvo to either side).

Full-salvo damage100,000

All tubes hitting one target: tubes x per-torpedo simulated damage = 4 x 25,000 = 100,000.

Per-side salvo damage100,000

One side firing, all torpedoes hitting: per-side tubes x per-torpedo simulated damage = 4 x 25,000 = 100,000.

AA defense

AA DPS at max range60

Only families that reach 5 km contribute at the outer edge of the AA bubble. In-game families: 40mm Bofors Mk1 5x2 -> 109 DPS @ 3.5 km; 20mm Oerlikon Twin 7x2 -> 93 DPS @ 2 km; Far AA (?) -> 60 DPS @ 5 km.

Maximum AA range5 km

Longest-reaching family on the in-game AA card. Base AirDefense aura max range is 3.5 km; dual-purpose mount auras extend it.

AA DPS layered by range60 DPS @ 5 km, 169 DPS @ 3.5 km, 262 DPS @ 2 km

Cumulative AA DPS at each family range threshold. Inner ranges stack the outer families, so a target closing the distance hits stronger AA bubbles as it crosses each band.

AA DPS at point-blank262

Sum of every family's average DPS, achievable only inside the closest-range family (2 km).

AA threat index868

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.

Near aura range2 km

Armor Beta

Hull HP 17,100 → 18,600 with hull upgrade, distributed across 5 hull zones, each with its own plate thicknesses, saturation cap, and pen thresholds. HP caps are estimated from the standard WoWs damage-allocation model.

Bow & stern19 mm

Overmatched by 136+ guns across the bracket. Can’t reliably bow-tank; gets bow-citadelled and overpenned.

Farming19 mm

Superstructure and extremities take HE pens and AP overpens from nearly any gun: steady chip damage. Fire resistance 37%, fires burn 30s. Range-by-range in the Compare tool →

Section	Plates	HP cap	Threats	Tactic
Bow	19 mm primary (range 19–20 mm)	≈ 930 (~5% of HP)	Overmatched by 283mm+ (Scharnhorst, Scharnhorst '43)Angle bounces 203mm19 mm: HE pens from 127mm+	Bow-tank fits behind this exterior plate. Saturation is FAST here; the cap is often only a few thousand HP.
Hull (midship)	19 mm	≈ 13,950 (~75% of HP)	Overmatched by 283mm+ (Scharnhorst, Scharnhorst '43)Angle bounces 203mm19 mm: HE pens from 127mm+	Largest HP pool. Citadel sits behind these plates; thinner deck and side plating absorb the rest.
Stern	19 mm primary (range 13–20 mm)	≈ 930 (~5% of HP)	Overmatched by 283mm+ (Scharnhorst, Scharnhorst '43)Angle bounces 203mm19 mm: HE pens from 127mm+	Mirror of bow. Same fast saturation.
Citadel	20 mm primary (range 13–20 mm)	no cap	Citadel pen: full damageOver-pen: ×0.10 damage	Effectively no cap; citadel pool sits at ~165k HP on every ship. An AP citadel penetration deals the shell's full damage, the biggest single hit available; only over-penetrations are damped, to ×0.10.
Superstructure	19 mm	no cap	Any HE ≥16 mm pens at full damage	Any HE ≥16 mm pens at full damage. HE-spam target, and the section saturates fast (often only a few thousand HP).

Saturation cap = HP a section can absorb before further damage to it is reduced (the "bow-tank" effect). Citadel pool is ~165k on every ship (effectively no cap); damage is gated by pen/over-pen multipliers instead. Superstructure saturates fast but HE always pens regardless of the plate thickness. Rudder (and other module HPs) are a separate pool from ship HP: damaging a module doesn't drain ship HP. Incapacitated modules like the rudder and engine are restored by DCP, but secondary and AA mounts destroyed at 0 HP stay out for the rest of the battle.

Open in Charting Tool

Ship Charts

Exteriors

Skins & permanent camouflages

Every custom exterior Osborne can equip, from in-game data.

DefaultThe ship’s standard exterior

Primary official WG sources

Filtered to official World of Warships: Legends pages where this ship is a focus, reward, line member, or high-context variant mention.

2026-06-25 · Patch notes July Update: Born to Sail Free Patch notes 2026-07-30 · Patch notes Anniversary Update: Tides of Adventure Patch notes

Osborne

Osborne Community Stats

Osborne Community Stats

Playstyle

Overview

Positioning

Potato Avoidance

Signature Traits →

How to get Osborne

Best listed chance for this ship

Builds

Cohort position

Peers in this cohort

Stats & specs

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Main battery formulas

Torpedoes

AA defense

Armor Beta

Ship Charts

Skins & permanent camouflages

Primary official WG sources

Signature Traits