GamingDiver / WoWs Legends Ships / Emerald

World of Warships: Legends ship guide

Emerald

Also called: 翡翠 Beta

U.K. · Tier IV · CL Cruiser · Tech Tree: Skirmishing Cruisers

AP-only cruiserEvery shell is AP; punish exposed sides and dodge between salvos.

Playstyle

Sit 10-13 km on a flank that gives you firing arcs into rotated cruisers and exposed BB broadsides
Avoid: Passing up destroyer shots because the AP over-pens

Key characteristics

Strong secondaries (4 km)Wide always-pen zoneStrong AALobs over islandsSmoke + SonarQuick-fuse AP

On this page

Community stats
Playstyle
How to get Emerald
Builds
Cohort position
Stats and specs
Armor
Charts
Balance history
Exteriors

Community Data

Emerald Community Stats

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

Playstyle

Overview

Emerald is a Tier IV British AP-only cruiser with strong AP DPM (154,286): she carries no HE shells at all, so every salvo is AP into broadsides or wasted. The hull is fragile, so the kit is fragile-spammer chasing soft targets and dodging in open water rather than trading punches. Sonar (3.7 km on ships and 2.7 km on torpedoes, 90 s active, 180 s reload, long uptime) lights up DDs and torpedoes inside its bubble, which lets her contest the cap edge without taking the spotting cycle. AA (230 AA DPS at 3.5 km) ranks 3 of 22 in T4 CAs: heavy enough to make a careless strike expensive, though not the umbrella that shuts a carrier out of her grid. Standout traits: best AP always-pen window in T4 CAs (65°) and best AP guaranteed-ricochet angle in T4 CAs (80°).

Positioning

Sit 10-13 km on a flank that gives you firing arcs into rotated cruisers and exposed BB broadsides. The hull is fragile; ration trades to ones that pay AP citadels back, and lean on speed and consumables to dodge focus when it comes. Open water is fine when the closest threat is far enough that the salvo timing favors you. Your AP loses penetration at range, so aim at superstructures or pen-able hull armor, not the bow-in or belt armor it bounces and shatters on. Shooting from the cloud gives you away at 4.7 km, and a destroyer here is spotted at about 6 km, so you see it coming with roughly 1.3 km to spare. Vision is mutual: past the 2 km guaranteed ring you cannot see out either, and only your Sonar bubble (3.7 km) sees out; past that you are shooting at what a teammate holds lit. Enemy sonar (about 3.7 km) reads straight in regardless. At 600 m the screen is wider than standard, so it can cover a teammate holding the same line as well as your own hull.

Potato Avoidance

Passing up destroyer shots because the AP over-pens

Even an over-pen is guaranteed chip damage that wears a DD down and denies its caps and torpedo runs, so keep guns on any destroyer you can see. Save the citadel salvos for broadside cruisers and BB sides, but never hold fire on a spotted DD. A skipped salvo is 7 s of nothing, and over-pens you did take would have been damage the destroyer cannot heal back.

Signature Traits

ELITE MAIN BATTERY ↗

Wide always-pen zone · 65°
Late auto-bounce · 80°
Sensitive AP fuse · 12 mm
Flat AP shells · 936 m

Lingering smoke ↗

96 s smoke cloud linger, best of T4 CAs. Each puff stays up longer after you stop laying it, holding the shield.

Quick acceleration ↗

~8.4 s to 90% of top speed, top decile of T4 CAs. Rebuilds speed quickly after a turn or stop, and sustains acceleration through the mid-range.

Quick-fuse AP ↗

0.0 s AP fuse timer, bottom decile of T4 CAs. Bursts earlier in the plate; trades belt-citadels for reliable damage against thin targets (cruiser-on-cruiser specialty).

Slow torp reload ↗

106 s torpedo reload, bottom decile of T4 CAs. Long wait between drops.

Acquisition

How to get Emerald

Emerald is available in the Skirmishing Cruisers branch of the U.K. Tech Tree for 500,000 credits after researching it in the branch. Known module upgrades cost up to 125,000 credits.

Show U.K. tech-tree branch diagram

U.K. Tech Tree

Emerald sits in the Skirmishing Cruisers branch. The highlighted path shows the local branch context inside the full U.K. tree.

8 ships in highlighted branch · scroll to inspect all U.K. lines.

U.K.IIIIIIIVVVIVIIVIII★

Destroyer

Cruiser

Cruiser Split

Battleship

Battleship Split

Carrier

Tier VRenownPBSB547 Tier VIIVanguardPBSB508 Tier VIIIDrakePBSC209 Tier VIIIDuncanPBSB209 Tier VIIAlbemarlePBSC208 Tier VIIHawkePBSB208 Tier VISurreyPBSC207 Tier VIRookePBSB207 Tier VDevonshirePBSC206 Tier IVHawkinsPBSC205 Tier IVTigerPBSB205 Tier IIIHermesPBSA204 Tier VIIITemerairePBSB112 Tier ★DaringPBSD110 Tier ★MinotaurPBSC110 Tier ★ConquerorPBSB110 Tier VIIIJutlandPBSD109 Tier VIIINeptunePBSC109 Tier VIILightningPBSD108 Tier VIIEdinburghPBSC108 Tier VIIImplacablePBSA108 Tier VIJervisPBSD107 Tier VIFijiPBSC107 Tier VIKing George VPBSB107 Tier VIcarusPBSD106 Tier VLeanderPBSC106 Tier VQueen ElizabethPBSB106 Tier VFuriousPBSA106 Tier IVAcastaPBSD105 Tier IVEmeraldPBSC105 Tier IVIron DukePBSB105 Tier IIIWakefulPBSD104 Tier IIIDanaePBSC104 Tier IIIOrionPBSB104 Tier IIValkyriePBSD103 Tier IICaledonPBSC103 Tier IWeymouthPBSC102

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 Emerald sits among Tier IV CAs (21 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.

BestAcceleration8.4 s (1/22) BestAP arming threshold12 mm (1/22) BestAP ricochet start65° (1/22) BestAP auto-bounce angle80° (1/22) BestTurn speed retained93% (1/22) BestSecondary range4.5 km (1 of 3 tied) Top 10%Smoke fire bloom4.7 km (3/22) Top 10%Main battery reload7 s (3/22) Top 10%AP velocity936 m/s (2/22) Top 10%AA DPS230 (3/22) Top 10%Bow armor15 mm (3/22) Top 25%Hit points27,100 HP (6/22) Top 25%Stealth profile10.42 km / 6.25 km (4/22 / 4/22) Top 25%Traverse-to-turn ratio6.89 × (5/22) Top 25%Secondary HE alpha1,500 (4/16) Bottom 25%Secondary DPM (per side)33,750 (15/16) Bottom 25%AP pen at 10 km78 mm (19/22) Bottom 25%Torpedo reload106 s (19/21) Bottom 25%Deck armor13 mm (20/22) WorstAP fuse timer0 s (22/22)

See 26 mid-pack stats

Not standouts for Emerald -- 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.

Max speed33 kt(15/22) Rudder shift7 s(11/22) Turning circle670 m(13/22) Main battery caliber152 mm(13/22) Main battery range13.42 km(14/22) AP shell damage3,000(16/22) AP DPM154,286(12/22) Main dispersion125.6 m(9/22) Secondary fire chance6%(7/16) Secondary HE pen17 mm(7/16) Engine power80,000 hp(15/22) Turn-speed retention119.4 hp/m(16/22) Displacement9,350 t(16/22) Power-to-weight8.56 hp/t(17/22) AA range3.5 km(16/22) AA threat520(11/22) Flak per wave (expected)252(9/17) Torpedo range6 km(15/21) Torpedo damage≈14,633(7/21) Torpedo speed59 kt(12/21) Torpedo reaction time7.6 s(11/21) Max armor76 mm(15/22) Citadel belt76 mm(8/22) Stern armor13 mm(11/22) NormSigma2(20 of 22 tied at this value) NormRepair heal rate0.5 %/s(2 of 3 tied at this value)

Peers in this cohort

Compare Tier IV Cruisers

Show all 21 peers

Stats & specs

Customize in the Build Tool →

Survivability

Hit PointsInitial: 24,000 → 27,100

Displacement9,350 t

Hull dimensions

Length x beam at the waterline, with the hull's draft where the client carries one. Ships whose client entry holds only the 260 x 20 m placeholder use a curated real-world figure instead, and any ship we have no trustworthy size for omits this row rather than print the placeholder. Length matters when dodging torpedoes; beam and draft shape how hard the ship is to hit.

173.4 x 17.1 m (measured from the ship model)

Armor range10–76 mm

Plate armor thicknesses10, 13, 15, 16, 19, 25, 38, 57, 76 mm

Armor material/layer entries40

Fire resistance

Does not reduce the damage a burning fire does per second: replay-measured burn ticks run at the full rate on every ship. By elimination it lowers how often hits set you on fire; ignition-rate replay data is consistent with that but too confounded by attacker mix to measure the reduction directly.

Initial: 13.3% → 16.6%

Fire duration30 s

Fire damage

Each fire ticks 0.3% of max HP per second for the full 30 s, so one unattended fire burns 9% of the pool (2,439 HP on this ship). 4 fire points can burn at once. Verified against measured burn ticks in replay data.

0.3% of HP per second

Flood duration40 s

Flood damage

A flood ticks 0.25% of max HP per second for the 40 s duration, so one unattended flood costs 10% of the pool (2,710 HP on this ship). Verified against measured flood ticks in replay data.

0.25% of HP per second

Torp Reduction

Reduces torpedo hit damage. Replay data shows no effect on floods: flood ticks run at the full rate and flood frequency does not decline with protection.

Magazine HP

Per-turret powder-magazine HP, a separate pool from the ship's. Penetrating hits wear it down and the turret is likelier to be knocked out as it falls, so a larger pool keeps the guns firing through punishment that silences a peer's.

13,600

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.

8,100

Effective HP

Base 27,100 HP plus everything Repair Party can restore: 0.5%/s x 28 s = 3,794 HP per charge, x2 charges = 7,588 HP. Ceiling, not a prediction: a charge only restores damage actually taken, and only the regeneratable share of it. Across 1,826 players in our replay corpus the median ship realized about half of this, mostly because half the charges go unspent — when Repair Party IS pressed it returns ~97% of the per-charge figure above.

34,688

Repairable: penetration50%

Repairable: citadel10%

Repairable: steering gear50%

Main Battery

ModuleArtillery: 152 mm/45 CPXIV

Mounts / barrels7 mounts / 7 barrels

Reload time7 s

Firing range (base)12.2 km

Firing range (top fire control)13.4 km

Turret traverse10 °/s

Turret armor76 mm

Turret traverse arcs

How far each mount can train, in degrees to either side of the mount's own facing, read from in-game data. A rear turret with ±150° leaves a 60° blind wedge over the bow; one-sided arcs are wing mounts that cover a single side. The data does not say which way each mount faces, so the arcs are listed per mount without bow/stern angles.

±145°, 175° port-only, ±129°, ±153°, ±132°, 175° starboard-only, ±146°

Guns to bear

How far off the bow (or stern) the ship must angle before every main turret can fire: the widest blind wedge among the rear-facing (or forward-facing) mounts, from each mount's trainable arc. Mount facing is inferred from turret stations and verified against known layouts, including Izumo's aft-facing forward turret.

48° off bow / 51° off stern

See the firing-arcs diagram ↓

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{13415.6}{30} \cdot \frac{8 - 1.1}{1000} + 1.1) \cdot 30 = 125.6 m

125.6 m at 13.4 km

Max Vert Disp

Vertical dispersion ellipse height at max range:

σ_{V} = σ_{H} \cdot radiusOnMax

= 125.6 \cdot 0.6 = 75.3 m

75.3 m at 13.4 km

Med Horiz Disp

50%-hit horizontal radius:

σ_{H, 50} = σ_{H} \cdot \frac{0.6}{σ}

= 125.6 \cdot \frac{0.6}{2} = 37.7 m

37.7 m at 13.4 km

Med Vert Disp

50%-hit vertical radius:

σ_{V, 50} = σ_{V} \cdot \frac{0.6}{σ}

= 75.3 \cdot \frac{0.6}{2} = 22.6 m

22.6 m at 13.4 km

Turret turn time

180 degrees / 10 deg/s traverse speed = 18 s.

18 s

Shells/min

6 broadside guns x 60 / 7 s base reload = 51.4.

51.4

AP shells

AP Damage3,000

AP Velocity936 m/s

Min Ricochet65 deg

Guaranteed Ricochet80 deg

Fuse Timer0.004 s

Fuse Threshold12 mm

AP overmatch

floor(152 mm caliber / 14.3) = 10 mm (AP auto-penetrates plating this thick or less).

10 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 2045 \cdot {45.36}^{0.69} \cdot {0.152}^{- 1.07} \cdot 936^{1.38} = 268.9 mm

. Matches the in-game spec card.

268.9 mm point-blank

AP Pen Far

Same formula at the ship's max firing range (13.4 km), where the shell has slowed to 304.7 m/s:

P = 10^{- 7} \cdot 2045 \cdot {45.36}^{0.69} \cdot {0.152}^{- 1.07} \cdot {304.7}^{1.38} = 57.1 mm

57.1 mm at 13.4 km

AP full-salvo alpha

3,000 AP damage x 6 broadside guns = 18,000.

18,000

AP DPM

18,000 AP full-salvo alpha x 60 / 7 s base reload = 154,286.

154,286

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 Mk VII

Launchers / tubes4 launchers × 4 tubes = 16 tubes

Reload time

Base reload of the top torpedo module (all-upgrades configuration); the stock module reloads in 71 s. In-game port tooltips additionally fold in your installed modernizations and commander effects - e.g. Torpedo Launchers Mod. 3 alone is x0.85:

106 \times 0.85 = 90.1

106 s

Projectile speed59 kt

Range6 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 = 43, 900 \cdot 0.333 = 14, 633

≈ 14,633

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.

15,733

Torpedo detectability1.2 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{1.2 km}{59 kt \times 2.6855} = 7.6 s

. The 2.6855 m/s-per-knot game-speed factor is calibrated from in-game measurement; the community's traditional 2.6 reads about 3% slower. Base value; commander torpedo-concealment skills lower it further. Community torpedo-reaction calculator by u/LorenDovah and u/The_ColorOutofSpace.

7.6 s

Flooding chance

Read straight from the game's own data: this torpedo carries a flooding-chance value of 2.62 per hit, shown as

2.62 \times 100 = 262 %

. 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.

262%

Torpedo launcher traverse25 °/s

Launch arcs133° per side

Torp Turn

Time to rotate the launchers 180 deg:

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

7.2 s

Torp Arming188 m

Per-side salvo damage

One side firing, all torpedoes hitting: per-side tubes x per-torpedo simulated damage = 8 x 14,633 = 117,064.

117,064

AA Defense

AA mount pointsInitial: 8 → 14

Maximum AA range

Longest-reaching family on the in-game AA card. Base AirDefense aura max range is 2 km; dual-purpose mount auras extend it.

3.5 km

40 mm Vickers 2-pdr. Mk VIIInitial: 40 mm Vickers 2-pdr. QF Mk II (2×1) → 40 mm Vickers 2-pdr. Mk VII (2×4)

20 mm Oerlikon Mk IV (upgraded hull only)6×1 20mm

20 mm Oerlikon Mk V (upgraded hull only)6×2 20mm

12.7 mm Mk III (stock hull only)6×4 13mm

102 mm/45 Mk V (DP)

Dual-purpose: your secondaries doing double duty against aircraft. The same mounts appear on the Secondary Battery card - shared guns, not extra hardware.

3×1 102mm

Guns102 mm/45 Mk V (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 19 from dual-purpose secondaries firing as AA in this range band.

Range3.5 km

Guns40 mm Vickers 2-pdr. Mk VII

Continuous DPS

Effective DPS: 20 raw aura damage × 3.5 × 0.9 hit probability = 63 - the same in-game units as the Close-range AA DPS headline.

Range2.5 km

Total DPS in Aura

Far 19 + Medium 63 = 82

Guns20 mm Oerlikon Mk IV + 20 mm Oerlikon Mk V

Continuous DPS

Effective DPS: 50 raw aura damage × 3.5 × 0.85 hit probability = 149 - the same in-game units as the Close-range AA DPS headline.

149

Range2 km

Total DPS in Aura

Far 19 + Medium 63 + Near 149 = 231

231

Bursts

Each ~2 s wave fires 2 quick salvos of 1 clouds ahead of the attacking squadron - up to 2 clouds per wave × 140 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 × 1 clouds

Cloud damage

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

140

Cloud spawn chance

Each cloud in the pattern rolls this chance to spawn, so waves average fewer clouds than the maximum. Often called flak 'hit chance', but spawned clouds always damage planes that fly into them - the roll is on spawning.

90%

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 secondary battery mount is operational - even losing every other AA mount does not stop it.

Secondary 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 3.5 km - once planes get inside the band, new waves stop. AA range bonuses push the outer edge out; the 2.5 km inner edge does not move.

2.5-3.5 km

See the AA layers diagram ↓

Secondary Battery

Mounts3

Firing range4.5 km

Shell Grouping (σ)1

102 mm/45 Mk V (DP)

Dual-purpose: the same mounts also fire at aircraft, so they appear on the AA Defense card too - shared guns, not extra hardware.

3×1 102mm

Caliber102 mm

Reload time4 s

HE Damage1,500

Muzzle Velocity811 m/s

Fire Chance6%

Armor Pen17 mm

Secondary dispersion type

Max dispersion = range (km) × 57 + 30. Each dispersion type sets its own slope; this is not a percentage applied to a standard baseline.

Standard

Max secondary dispersion @ 4.5 km

4.5 km × 57 + 30 = 286.5 m.

286.5 m

Maneuverability

Engine power80,000 hp

Maximum speed33 kt

Turning circle radius670 m

Rudder shift time7 s

Engine power-boost threshold30.7 kt

Engine spool-up time15.3 s

Reverse spool-up time7.7 s

Reverse speed

top speed / 4 + 4.9 = 33 / 4 + 4.9 = 13.2 kt. The community reverse-speed model from the WoWs ShipBuilder project, the same source as the acceleration model on this card. Base value; speed modifiers scale it. Not shown on the in-game card.

13.2 kt

Crash stop

Seconds from top speed to a dead stop after ordering full reverse: reverse power winds in over the reverse spool-up while water drag does most of the braking. Same community-model simulation as the acceleration times, using the ship's own reverse-power ratio from in-game data. The full curve is on the acceleration chart.

25.6 s

Engine boost threshold (reverse)

Speed below which the engine's built-in power boost applies in reverse. Matches the in-game maneuverability card's reverse threshold (Vampire II reads 10.5 here and the card shows 11; the card rounds half up).

9.3 kt

Acceleration 0-90%

Time to reach 90% of top speed (29.7 kt of 33 kt), from our in-house acceleration model.

8.4 s

Acceleration 0-99%

Time to reach 99% of top speed (32.7 kt of 33 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.

27.5 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{33.0 \cdot 0.5144}{670} = 1.45 ° / s

, so

ratio = \frac{ω_{turret}}{ω_{hull}} = \frac{10}{1.45} = 6.9 \times

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

6.9× slow

See the full acceleration curve ↓

Concealment

Detectability by sea10.42 km

Detectability by air6.25 km

Smoke firing penalty4.7 km

Detect when firing (sea)

Equal to the ship's main battery range (never below base detectability): firing makes you visible to everyone you can reach. Matches the in-game 'Detect Firing Sea' value on all 8 unmodified captures, and range-modified captures track the modified range.

13.42 km

Detect when firing (air)

Air detectability plus the gun-firing bloom (3.04 km, which tracks main-battery caliber x 0.020). Matches the in-game 'Detect Firing Air' value on every captured ship.

9.29 km

Detect when on fire (sea)

Base sea detectability + 2.0 km while burning; matches the in-game 'Detect Fire Sea' value on every captured ship.

12.42 km

Detect when on fire (air)

Base air detectability + 3.0 km while burning; matches the in-game 'Detect Fire Air' value on every captured ship.

9.25 km

Guaranteed Detect2 km

✦

Consumables

Damage Control Party∞ charges · 60 s reload · 5 s active

Repair Party2 charges · 80 s reload · 28 s active · 3,794 HP (14% of max HP) total heal (per charge)
ƒ
Heal per second (0.5%) x effective active time (28 s) = up to 14% of max HP restored per charge.
· 7,588 HP (28% of max HP) total heal (all charges)
ƒ
14% per charge x 2 charges = up to 28% of max HP if the whole Repair Party loadout is used.
· 136 HP/s (0.5% of max HP) heal per second
ƒ
0.5% of max HP (27,100 HP) per second = 136 HP/s. WoWS heals a flat percent of MAX HP each second, so this rate holds at any health level.

Sonar2 charges · 180 s reload · 90 s active · 3.72 km ship detect
ƒ
Derived from the consumable's 30 m grid-unit range (km = grid units x 30 / 1000): $\frac{124 \times 30}{1000} = 3.72 km$
· 2.67 km torpedo detect
ƒ
Derived from the consumable's 30 m grid-unit range (km = grid units x 30 / 1000): $\frac{89 \times 30}{1000} = 2.67 km$

Choose one

Smoke Generator2 charges · 240 s reload · 15 s emit / 96 s cloud active · 600 m radius

Catapult Fighter3 charges · 80 s reload · 90 s active · 5 km patrol radius
ƒ
Derived from the consumable's 30 m grid-unit range (km = grid units x 30 / 1000): $\frac{167 \times 30}{1000} = 5 km$
· 1 squadron size

Module options (3)

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

HullUpgrade

Hit points24,000 → 27,100
Rudder shift12.8 → 9.1 s
AA mounts8 → 14
Close-range AA DPS28 → 70
Maximum AA range2 → 2.5 km

Fire controlUpgrade

Main battery range12,196 → 13415.6 m

TorpedoesTrade-off

Reload71 → 106 s
Alpha damage33,200 → 43,900
Display damage11,067 → 14,633

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 Disp125.6 m at 13.4 km

Horizontal dispersion ellipse width at max range, from the verified WoWS dispersion model:  $σ_{H} = (\frac{R}{30} \cdot \frac{idealRadius - minRadius}{idealDistance} + minRadius) \cdot 30$   $= (\frac{13415.6}{30} \cdot \frac{8 - 1.1}{1000} + 1.1) \cdot 30 = 125.6 m$

Shell scatter width @ 5 km67.5 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 km102 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 Disp75.3 m at 13.4 km

Vertical dispersion ellipse height at max range: $σ_{V} = σ_{H} \cdot radiusOnMax$ $= 125.6 \cdot 0.6 = 75.3 m$

Shell scatter height @ 10 km56 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  $delim \cdot R_{m a x} = 0.5 \cdot 13415.6 = 6708$  m, and  $radiusOnMax = 0.6$  at 13415.6 m. Above the kink:  $k = 0.5 + (0.6 - 0.5) \cdot \frac{10000 - 6708}{13415.6 - 6708} = 0.5491$ , so  $σ_{V} = σ_{H} \cdot k = 102 \cdot 0.5491 = 56 m$ .

Med Horiz Disp37.7 m at 13.4 km

50%-hit horizontal radius: $σ_{H, 50} = σ_{H} \cdot \frac{0.6}{σ}$ $= 125.6 \cdot \frac{0.6}{2} = 37.7 m$

Med Vert Disp22.6 m at 13.4 km

50%-hit vertical radius: $σ_{V, 50} = σ_{V} \cdot \frac{0.6}{σ}$ $= 75.3 \cdot \frac{0.6}{2} = 22.6 m$

Dispersion familyCruiser Disp.

Standard cruiser dispersion baseline.

AP Pen Close268.9 mm point-blank

Canonical community AP formula (jcw780/wows_shell), evaluated at muzzle velocity:  $P = 10^{- 7} \cdot K \cdot m^{0.69} \cdot d^{- 1.07} \cdot v_{0}^{1.38}$   $= 10^{- 7} \cdot 2045 \cdot {45.36}^{0.69} \cdot {0.152}^{- 1.07} \cdot 936^{1.38} = 268.9 mm$ . Matches the in-game spec card.

AP Pen Far57.1 mm at 13.4 km

Same formula at the ship's max firing range (13.4 km), where the shell has slowed to 304.7 m/s:  $P = 10^{- 7} \cdot 2045 \cdot {45.36}^{0.69} \cdot {0.152}^{- 1.07} \cdot {304.7}^{1.38} = 57.1 mm$ .

AP pen 5 km142 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 km78 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.

AP flight time @ 10 km6.33 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:  $k = \frac{π C_{d} d^{2}}{8 m} = \frac{π \cdot 0.3786 \cdot {0.152}^{2}}{8 \cdot 45.36} = 7.57 \times 10^{- 5}$ . That runs from a 936 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 overmatch10 mm

floor(152 mm caliber / 14.3) = 10 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.

Broadside guns used for alpha6

Barrels that can bear on one beam (6 of 7); casemate/wing mounts only fire one side.

Turret turn time18 s

180 degrees / 10 deg/s traverse speed = 18 s.

AP full-salvo alpha18,000

3,000 AP damage x 6 broadside guns = 18,000.

AP DPM154,286

18,000 AP full-salvo alpha x 60 / 7 s base reload = 154,286.

Shells/min51.4

6 broadside guns x 60 / 7 s base reload = 51.4.

Torpedoes

Torpedo detectability1.2 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 speed59 kt

Travel time to max range37.9 s

range / (speed kt x 2.6855 game-speed factor, m/s per knot, calibrated from in-game measurement).

Torpedo module damage1,100

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 count16

4 launchers x 4 tubes.

Per-side salvo8 torpedoes

tube count / 2 (symmetric port/starboard launcher layout; common on cruisers and battleships with deck torpedoes).

Full-salvo damage234,128

All tubes hitting one target: tubes x per-torpedo simulated damage = 16 x 14,633 = 234,128.

Per-side salvo damage117,064

One side firing, all torpedoes hitting: per-side tubes x per-torpedo simulated damage = 8 x 14,633 = 117,064.

AA defense

AA DPS at max range19

Only families that reach 3.5 km contribute at the outer edge of the AA bubble. In-game families: 2 pdr MkVII Quad 2x4 -> 63 DPS @ 2.5 km; 20mm Oerlikon MK4 6x1 -> 74 DPS @ 2 km; 20mm Oerlikon MK V 6x2 -> 74 DPS @ 2 km; 4in 45 MK V 3x1 -> 19 DPS @ 3.5 km.

Maximum AA range3.5 km

Longest-reaching family on the in-game AA card. Base AirDefense aura max range is 2 km; dual-purpose mount auras extend it.

AA DPS layered by range19 DPS @ 3.5 km, 82 DPS @ 2.5 km, 230 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-blank230

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

AA threat index520

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

Secondary battery dispersion

Secondary dispersion typeStandard

Max dispersion = range (km) × 57 + 30. Each dispersion type sets its own slope; this is not a percentage applied to a standard baseline.

Max secondary dispersion @ 4.5 km286.5 m

4.5 km × 57 + 30 = 286.5 m.

Secondary battery firepower

Secondary DPM (per side)33,750

Sum across all secondary families of (per-side barrels × 60 / reload_s × alpha), where per-side barrels = mounts × barrels-per-mount / 2 (the guns that bear on one broadside target). Per-family: 3×1 102 mm (1.5/side) × 60/4 × 1500 = 33,750. Assumes every shell hits (real hit rate is lower; the Brawl matchup tool on the Compare page folds in dispersion + target armor).

Max HE alpha1500

Maximum HE damage per shell across secondary HE families. Best on this ship: 1500 from the 102 mm family.

Max HE fire chance6%

Maximum per-shell fire chance across secondary HE families (before target fire resistance is applied). Best on this ship: 6% from the 102 mm family.

Max HE pen17 mm

Maximum HE armor penetration across secondary HE families (caliber × 1/6 for most nations; 1/4 for German/UK BBs). Shells whose pen falls under a plate's armor thickness shatter for 0 hull damage though fire chance still applies. Best on this ship: 17 mm from the 102 mm family.

Armor Beta

Hull HP 24,000 → 27,100 with hull upgrade, distributed across 5 hull zones, each with its own plate thicknesses, saturation cap, and pen thresholds. HP caps are the exact in-game values, not estimated.

Bow & stern15 mm

Overmatched by 76+ AP guns across the bracket. Can’t reliably bow-tank; gets bow-citadelled and overpenned.

Belt / citadel76 mm

Thin belt: battleship AP citadels straight through it broadside. Rely on angle, speed and concealment, never sit flat.

Farming13 mm

Superstructure and extremities take HE pens and AP overpens from nearly any gun: steady chip damage. Fire resistance 17%, fires burn 30s. Range-by-range in the Compare tool →

Section	Plates	HP cap	Threats	Tactic
Bow	15 mm primary (range 13–38 mm)	3,000 (11% of HP)	Overmatched by 283mm+ AP (Nassau, Von Der Tann)Angle bounces 203mm15 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)	25 mm	20,300 (75% of HP)	Overmatched by 380mm+ AP (Bayern)Angle bounces 356mm25 mm: HE pens from 150mm+	Largest HP pool. Citadel sits behind these plates; thinner deck and side plating absorb the rest.
Stern	13 mm primary (range 13–38 mm)	1,700 (6% of HP)	Overmatched by 203mm+ AP (Desert Falcon, Baleares)Angle bounces 152mm13 mm: HE pens from 127mm+	Mirror of bow. Same fast saturation.
Citadel	76 mm primary (range 10–76 mm)	≈ 165,500 (effectively 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	13 mm	3,400 (13% of HP)	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).
Turret (module, per magazine)	separate HP pool, does not drain ship HP	13,600 magazine HP	Turret knocked out	Per-turret powder-magazine HP, a separate pool that does not drain ship HP. As it is worn down the turret is likelier to be knocked out, and a smaller pool gets there faster.
Secondary mount (102 mm mount)	separate HP pool, does not drain ship HP	800 per-mount HP	Destroyed at 0 HP	Per-mount HP for the heaviest secondary on this ship. A mount destroyed at 0 HP is out for the rest of the battle; DCP does not repair destroyed mounts. Smaller (lighter-caliber) secondaries typically share the same HP value.
AA mount (40 mm mount)	separate HP pool, does not drain ship HP	200 per-mount HP	Destroyed at 0 HP	Per-mount HP for the heaviest AA on this ship. An AA mount destroyed at 0 HP stops shooting down planes for the rest of the battle; DCP does not repair destroyed mounts. HE shells specifically target AA mounts since the small-caliber HP pool falls fast.
Rudder (module)	separate HP pool, does not drain ship HP	8,100 module HP	Incapacitated at 0 HP	When module HP reaches 0 the rudder locks at its current angle until DCP repairs it. Repair via Damage Control Party.

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

Balance History

Balance updates affecting Emerald. Cards are condensed; use each source link for full context.

Buff ×3Main Battery ×1

2025-11-27

Holiday Update: Christmas on the Waves

Main battery reload time reduced from 7.5 to 7.0 seconds.

Read the full official post

2023-06-15

Ministry of Balance: Italian Concerto

Stock Hull rudder-shift time reduced from 10.9 to 9.8 s.
Upgraded Hull rudder-shift time reduced from 7.8 to 7.0 s.

Read the full official post

Exteriors

Skins & permanent camouflages

Every custom exterior Emerald 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.

2025-11-27 · Patch notes Holiday Update: Christmas on the Waves Patch notes

Emerald

Emerald Community Stats

Emerald Community Stats

Playstyle

Overview

Positioning

Potato Avoidance

Signature Traits →

How to get Emerald

Builds

Cohort position

Peers in this cohort

Stats & specs

See all derived stats

Main battery formulas

Torpedoes

AA defense

Secondary battery dispersion

Secondary battery firepower

Armor Beta

Ship Charts

Balance History

Holiday Update: Christmas on the Waves

Ministry of Balance: Italian Concerto

Skins & permanent camouflages

Primary official WG sources

Signature Traits