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

Sonar cruiserSonar contests islands and smoke without exposing the hull to vision cycles.

Playstyle

Work the islands rather than a firing line
Avoid: Pushing in blind because the kit says brawler

Key characteristics

Strong secondaries (4.5 km)Wide always-pen zoneStrong AALobs over islandsSmoke + SonarSlow torp reload

On this page

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

Community Data

Emerald Community Stats

Across 7,000+ Standard battles from 370+ players, Emerald averages a 54% win rate, 27,600 damage and 0.9 kills per battle, and survives 27% of them.

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 light cruiser with Sonar as her vision tool. It lets her contest islands and smoke without exposing the hull to vision cycles, which shapes how she pressures caps. A Smoke Generator on top means she can fight from cover the sonar has already cleared, with the bubble out to 3.7 km. AA (230 AA DPS at 3.5 km) ranks 3 of 23 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 big torpedo salvo in T4 CAs (8, 2nd of 21) and sensitive AP fuse in T4 CAs (12 mm, 1st of 23). The trade is torpedo reload in T4 CAs (106 s, 19th of 21).

Positioning

Work the islands rather than a firing line. Sonar (3.7 km on ships, 2.7 km on torpedoes) is the whole kit, and it only pays inside that radius, so hold the cover beside a contested cap and use it to catch destroyers and torpedoes coming around the corner: HE into the destroyer, AP into any cruiser that shows you a broadside while it sits in smoke. Lead with AP wherever the target gives you a side; the HE is the weaker barrel here, so save it for targets AP cannot punish. 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 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

Pushing in blind because the kit says brawler

3.7-km Sonar is what makes the close fight winnable, and it only helps once you are already committed; it does not tell you what is waiting two islands over. Push when a destroyer is lit or a teammate holds vision, not to find out who is there.

Signature Traits

Top-tier AA ↗

230 AA DPS, top decile of T4 CAs (median 169).

Big torpedo salvo ↗

8 tubes per side, best of T4 CAs. More torpedoes per launch: spread wide to cover a reposition, or tight for more hits on a thin target.

ELITE MAIN BATTERY ↗

Sensitive AP fuse · arms on 12 mm+ plate
Fast turret traverse · 10°/s

Quick acceleration ↗

~2.8 s from a stop to 12 kt, top decile of T4 CAs. Rebuilds speed quickly after a turn or a stop, so it re-angles and repositions without staying a stationary target.

Slow torp reload ↗

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

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).

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.

While you save up, check active promo codes for free doubloons, camouflages, and other rewards.

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 ★St. VincentPBSB210 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 →

Have a build you swear by? Open it in the Build Tool and hit Save build to share it here, or browse the Ship Builds guide for proven loadouts across the fleet.

Cohort position

Hide ▾

Where Emerald sits among Tier IV CAs (22 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.

BestTime to 90% speed8.2 s (1/23) BestAcceleration (0-12 kt)2.8 s (1/23) BestAP arming threshold12 mm (1/23) BestAP ricochet start65° (1/23) BestAP auto-bounce angle80° (1/23) BestTurn speed retained93% (1/23) BestSecondary range4.5 km (1 of 3 tied) Top 10%Main battery reload7 s (3/23) Top 10%AP velocity936 m/s (2/23) Top 10%AA DPS230 (3/23) Top 10%Bow armor15 mm (3/23) Top 25%Hit points27,100 HP (6/23) Top 25%Stealth profile10.42 km / 6.25 km (5/23 / 5/23) Top 25%Smoke fire bloom4.7 km (4/23) Top 25%Secondary HE alpha1,500 (5/16) Bottom 25%Secondary DPM (per side)33,750 (15/16) Bottom 25%AP pen at 10 km78 mm (20/23) Bottom 25%Torpedo reload106 s (19/21) ShortestAP fuse timer0.004 s (23/23)

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(15/23) Rudder shift7 s(11/23) Turning circle670 m(13/23) Main battery caliber152 mm(13/23) Main battery range13.42 km(15/23) AP shell damage3,000(17/23) AP DPM154,286(13/23) Main dispersion125.6 m(9/23) Secondary fire chance6%(7/16) Secondary HE pen17 mm(7/16) Engine power80,000 hp(15/23) Power / turn radius119.4 hp/m(17/23) Displacement9,350 t(17/23) Power-to-weight8.56 hp/t(17/23) AA range3.5 km(17/23) AA threat520(12/23) Flak damage per salvo (expected)252(11/17) 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(15/23) Citadel belt76 mm(8/23) Stern armor13 mm(11/23) NormSigma2(21 of 23 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 22 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, plus draft. Length matters when dodging torpedoes; beam and draft shape how hard the ship is to hit.

173.4 x 17.1 m (ship-model figure)

Armor range10–76 mm

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

Armor material/layer entries40

Fire resistance

stock hull: 1 − 0.8668 fire coefficient = 13.3%; top hull: 1 − 0.8335 fire coefficient = 16.6%. Lowers how often hits set you on fire. It does not reduce the damage a burning fire does per second; fires burn at the full rate on every ship.

Initial: 13.3% → 16.6%

Fire duration30 s

Fire damage

One unattended fire: 0.003 of max HP per second (0.3%) × 30 s = 0.09 of the pool; 0.09 × 27,100 HP = 2,439 HP on this ship. 4 fire points can burn at once.

0.3% of HP per second

Flood duration40 s

Flood damage

One unattended flood: 0.0025 of max HP per second (0.25%) × 40 s = 0.1 of the pool; 0.1 × 27,100 HP = 2,710 HP on this ship.

0.25% of HP per second

Torp Reduction

1 − 0.333 hull torpedo-damage coefficient / 0.333 unprotected baseline = 0%. Reduces torpedo hit damage. It does not affect flooding: floods start as often and tick at the full rate.

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: 0.005 of max HP per second (0.5%) × 28 s × 27,100 HP = 3,794 HP per charge, × 2 charges = 7,588 HP. Ceiling, not a prediction: a charge only restores damage actually taken, and only the regeneratable share of it. In practice ships realize about half of this, mostly because half the charges go unspent; a charge that is used returns about 97% of the per-charge figure above.

30,111–34,688

Repairable: penetration50%

Repairable: citadel10%

Repairable: steering gear50%

Bow section HP

Damage saturation pool for the bow: penetrations here deal their normal share until twice this much penetration damage has landed on the section (2 × 3,000 = 6,000), then further hits on it deal half damage. A penetration deals 0.33 × the shell's max damage; once the section is saturated it deals exactly half of that (0.5 × 0.33 = 0.165 × max damage), so a 3,000-damage shell's pen goes from 990 to 495. Overpens (0.1 × max damage) and citadels (1.0 ×) ignore saturation. Pens on the ship's other, unsaturated sections still deal the normal 0.33 ×. A larger pool keeps that part of the ship taking full damage for longer; a small one saturates fast and protects the ship's HP.

3,000

Hull section HP

Damage saturation pool for the hull: penetrations here deal their normal share until twice this much penetration damage has landed on the section (2 × 20,300 = 40,600), then further hits on it deal half damage. A penetration deals 0.33 × the shell's max damage; once the section is saturated it deals exactly half of that (0.5 × 0.33 = 0.165 × max damage), so a 3,000-damage shell's pen goes from 990 to 495. Overpens (0.1 × max damage) and citadels (1.0 ×) ignore saturation. Pens on the ship's other, unsaturated sections still deal the normal 0.33 ×. A larger pool keeps that part of the ship taking full damage for longer; a small one saturates fast and protects the ship's HP.

20,300

Superstructure section HP

Damage saturation pool for the superstructure: penetrations here deal their normal share until twice this much penetration damage has landed on the section (2 × 3,400 = 6,800), then further hits on it deal half damage. A penetration deals 0.33 × the shell's max damage; once the section is saturated it deals exactly half of that (0.5 × 0.33 = 0.165 × max damage), so a 3,000-damage shell's pen goes from 990 to 495. Overpens (0.1 × max damage) and citadels (1.0 ×) ignore saturation. Pens on the ship's other, unsaturated sections still deal the normal 0.33 ×. The superstructure is not exempt: it saturates exactly like the bow and stern, so shells aimed at it stop dealing full damage once this pool is used up. A larger pool keeps that part of the ship taking full damage for longer; a small one saturates fast and protects the ship's HP.

3,400

Stern section HP

Damage saturation pool for the stern: penetrations here deal their normal share until twice this much penetration damage has landed on the section (2 × 1,700 = 3,400), then further hits on it deal half damage. A penetration deals 0.33 × the shell's max damage; once the section is saturated it deals exactly half of that (0.5 × 0.33 = 0.165 × max damage), so a 3,000-damage shell's pen goes from 990 to 495. Overpens (0.1 × max damage) and citadels (1.0 ×) ignore saturation. Pens on the ship's other, unsaturated sections still deal the normal 0.33 ×. A larger pool keeps that part of the ship taking full damage for longer; a small one saturates fast and protects the ship's HP.

1,700

Citadel section HP

This section has no practical saturation cap: every hit here keeps dealing its normal share of damage (on most ships the citadel; on many destroyers the casemate).

No saturation cap

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. 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

180° − 132° (the most restricted aft-facing mount's arc) = 48° off bow; 180° − 129° (the most restricted forward-facing mount's arc) = 51° off stern. 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.

48° off bow / 51° off stern

See the firing-arcs diagram ↓

Shell Grouping (σ)2

Dispersion type

In practice: the baseline curve for a standard cruiser -- at max range (13.4 km) shells land in an ellipse about 126 m wide and 75 m tall. Also on this curve (215): AL Baltimore, AL Chapayev, AL Cheshire, AL Harbin, AL Montpelier, AL Tallinn, AL Zara, Aberdeen, Accord, Agano, Albemarle, Algérie and 203 more.

Standard cruiser

Max Horiz Disp

Horizontal dispersion ellipse width at max range, from the 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 alpha3,000

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

AP formula 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

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. Modernizations and commander effects scale it further, e.g. Torpedo Launchers Mod. 3 alone is x0.85:

106 \times 0.85 = 90.1

Initial: 71 s → 106 s

Projectile speed59.0 kt

Range6 km

Maximum simulated damage

Initial: 33,200 × 0.333 = 11,067 → 43,900 × 0.333 = 14,633 (warhead alpha × saturation coefficient, stock → upgraded torpedo). Most targets only intersect one hull section, so a hit transfers about 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

. In battle, a hit on the torpedo belt deals the per-hit figure × (1 − the target's torpedo protection %), a bow or stern hit deals it in full, and a torpedo never counts as a citadel hit.

Initial: ≈ 11,067 → ≈ 14,633

Maximum damage (ammunition)

43,900 warhead alpha / 3 + 1,100 blast = 15,733. Warhead alpha / 3 plus the blast addend: the per-torpedo damage figure. The 'Maximum simulated damage' row above applies target geometry to the same warhead.

15,733

Torpedo module damage

Per-torpedo module/blast damage parameter. 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.

1,100

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

. 2.6855 converts knots to m/s on the game clock. Base value; commander torpedo-concealment skills lower it further.

7.6 s

Flooding chance

This torpedo carries a flooding-chance value of 2.62 per hit, shown as

2.62 \times 100 = 262 %

. 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.

262%

Torpedo launcher traverse25 °/s

Launch arcswing 133° (one launcher per beam)

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. Each hit on the target's torpedo belt is reduced by its torpedo protection %.

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

AA explosions

Each ~2 s salvo fires 2 AA explosions in quick succession, each leaving 1 cloud ahead of the attacking squadron - up to 2 clouds per salvo × 140 damage each. Planes that fly into a cloud take its damage; clouds dissipate before the next salvo lands. Defensive AA Fire, where fitted, multiplies the AA explosions within each salvo, and commander skills that raise the Number of AA explosions add to it.

2 per salvo, 1 cloud each

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 salvos 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%

Salvo interval

A new flak salvo (the AA explosions above) fires roughly every 2 s.

every ~2 s

Fired by

Flak keeps firing while at least one secondary battery mount is operational - even losing every dedicated 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 clouds can land short of 2.5 km or past 3.5 km - once planes get inside the band, new salvos 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

Secondary DPM (per side)

Sum across all secondary families of (per-side barrels × 60 / reload_s × alpha), with each reload counted in whole 1/7 s ticks (guns fire on the first tick after the reload), 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 s × 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).

33,750

Secondary fire DPM vs T4 BB (per side)

Fires/min (per side) 1.4 × (1 − 0.166 fire resistance) × 60 s × 0.003 of max HP per second × 48,200 HP = 9,768. Per side: the barrels that bear on one broadside target (mounts × barrels / 2). A ceiling: assumes every shell hits and ignores the four-fire cap and Fire Prevention.

9,768

Total secondary DPM vs T4 BB (per side)

Secondary DPM (per side) 33,750 + secondary fire DPM 9,768 = 43,518: shell damage plus fire damage against one T4 battleship, every shell hitting.

43,518

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 alpha1,500

Muzzle Velocity811 m/s

Fire Chance6%

Secondary fires/min (per side)

3×1 barrels / 2 sides × 60 / 4 s × 0.06 (6% fire chance) = 1.4. Per side: the barrels that bear on one broadside target (mounts × barrels / 2). A ceiling: assumes every shell hits and ignores the four-fire cap and Fire Prevention.

1.4

HE 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 speed33.0 kt

Turning circle radius670 m

Rudder shift timeInitial: 9.8 s → 7 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. Base value; speed modifiers scale it.

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, using the ship's own reverse-power ratio. The full curve is on the acceleration chart. Full reverse stops about a quarter faster than a plain Stop order from top speed.

26.6 s

Engine boost threshold (reverse)

Speed below which the engine's built-in power boost applies in reverse.

9.3 kt

Acceleration 0-90%

Time to reach 90% of top speed (29.7 kt of 33.0 kt).

8.2 s

Acceleration 0-99%

Time to reach 99% of top speed (32.7 kt of 33.0 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.

26 s

Guns in a full turn

With the rudder hard over the hull turns 6.4°/s, so a target drifts across the bow at that rate. Turret traverse minus hull turn: 10 − 6.4 = +3.6°/s, so the guns hold the target through the turn. Main Battery Mod. 2 (+20% traverse) and Mod. 3 (−15%) move this line.

hold target (+3.6°/s spare)

See the full acceleration curve ↓

Concealment

Detectability by sea

Base value, no camouflage. With a Grade IV permanent camo (or any disposable camo): 10.42 km x 0.955 = 9.95 km. Camouflage does not change detectability by air.

10.42 km

With Grade IV camouflage (sea)

Detectability by sea 10.42 km x 0.955 (Grade IV permanent camo or any disposable camo) = 9.95 km.

9.95 km

Detectability by air6.25 km

Smoke firing penalty4.7 km

Detect when firing (sea)

max(main battery range, sea detectability 10.42 km) = 13.42 km. Equal to the ship's main battery range (never below base detectability): firing makes you visible to everyone you can reach.

13.42 km

Detect when firing (air)

Air detectability 6.25 km + gun-firing bloom 3.04 km = 9.29 km. The bloom tracks main-battery caliber 152 mm × 0.020 = 3.04 km.

9.29 km

Detect when on fire (sea)

Sea detectability 10.42 km + 2.0 km while burning = 12.42 km.

12.42 km

Detect when on fire (air)

Air detectability 6.25 km + 3.0 km while burning = 9.25 km.

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
0.005 of max HP per second (0.5%) × 28 s effective active time = 0.14 of max HP × 27,100 HP = 3,794 HP: up to 14% of max HP restored per charge.
· 7,588 HP (28% of max HP) total heal (all charges)
ƒ
0.14 of max HP per charge × 2 charges = 0.28 × 27,100 HP = 7,588 HP: 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
0.005 (0.5% of max HP) × 27,100 HP = 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 · 70 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 shift9.8 → 7 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

Under the hood

Show ▾

All values are ship base stats with modifications and upgrade changes denoted inline.

The constants behind the formulas and the long tail: shell and dispersion inputs, fixed-range anchors, salvo math, layered AA. Click the formula chip on any row to see how it is calculated.

Main battery formulas

vs standard cruiserStandard

The standard cruiser dispersion curve.

Shell scatter width @ 5 km67.5 m

(166.7 × (8 − 1.1) / 1000 + 1.1) × 30 = 67.5 m. Horizontal scatter at a fixed 5 km, from the same dispersion model as the rows below - a knife-fight-range anchor comparable across ships.

Shell scatter width @ 10 km102 m

(333.3 × (8 − 1.1) / 1000 + 1.1) × 30 = 102 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 height @ 5 km28.6 m

How tall the scatter ellipse is at a fixed 5 km, from the same model, comparable from ship to ship. 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. Below the kink:  $k = 0.2 + (0.5 - 0.2) \cdot \frac{5000}{6708} = 0.4236$ , so  $σ_{V} = σ_{H} \cdot k = 67.5 \cdot 0.4236 = 28.6 m$ .

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  $σ_{V} = σ_{H} \cdot k = 102 \cdot 0.5491 = 56 m$ .

AP pen 5 km142 mm

AP penetration at a fixed 5 km, from the same ballistic curve as AP Pen Close/Far: the shell's impact velocity at that range fed through the AP formula  $P = 10^{- 7} \cdot K \cdot m^{0.69} \cdot d^{- 1.07} \cdot v^{1.38}$   $= 10^{- 7} \cdot 2045 \cdot {45.36}^{0.69} \cdot {0.152}^{- 1.07} \cdot {588.9}^{1.38} = 142 mm$ , where 588.9 m/s is the shell's speed when it arrives at 5 km (from 936 m/s at the muzzle). 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, from the same ballistic curve as AP Pen Close/Far: the shell's impact velocity at that range fed through the AP formula  $P = 10^{- 7} \cdot K \cdot m^{0.69} \cdot d^{- 1.07} \cdot v^{1.38}$   $= 10^{- 7} \cdot 2045 \cdot {45.36}^{0.69} \cdot {0.152}^{- 1.07} \cdot {382.6}^{1.38} = 78 mm$ , where 382.6 m/s is the shell's speed when it arrives at 10 km (from 936 m/s at the muzzle). 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 because the game clock runs faster than real time. Lower is better, since a faster shell is harder to dodge and needs less lead.

Guns per full salvo (alpha, DPM)6

Counted from each mount's firing arc: most barrels that bear at once: 6 of 7, on the beam; casemate/wing mounts only fire one side.

Model inputs

Krupp (AP)2,045

Armor-penetration constant of the AP shell; penetration scales straight with it, so a 10% higher Krupp is 10% more penetration at every range.

AP shell mass45.36 kg

Enters penetration as mass^0.69 and slows the shell's drag deceleration, so a heavier shell keeps more velocity at range.

AP drag coefficient0.3786

Air drag on the AP shell in flight; lower keeps velocity, and with it penetration, at long range.

AP muzzle velocity936 m/s

Starting speed of the AP shell; penetration scales with velocity^1.38.

idealRadius8

Horizontal dispersion growth per idealDistance of range, in 30 m units; the slope of the scatter-width line.

minRadius1.1

Horizontal dispersion at zero range, in 30 m units; the intercept of the scatter-width line.

idealDistance1,000 m

Range step over which horizontal dispersion grows by idealRadius.

taperDist4,000 m

Inside this range the scatter width tapers toward minRadius instead of following the line.

radiusOnZero0.2

Vertical scatter as a share of horizontal at zero range.

radiusOnDelim0.5

Vertical scatter as a share of horizontal at the delim point.

radiusOnMax0.6

Vertical scatter as a share of horizontal at maximum range.

delim0.5

Where the vertical-scatter curve bends, as a share of maximum range.

Torpedoes

Estimated torpedo reaction time7.6 s

1200 m / (59.0 kt × 2.6855) = 7.6 s. detectability / (speed kt x 2.6855 m/s per knot on the game clock).

Torpedo speed59.0 kt

Travel time to max range37.9 s

6000 m / (59.0 kt × 2.6855) = 37.9 s. range / (speed kt x 2.6855 m/s per knot on the game clock).

Tube count16

4 launchers × 4 tubes.

Per-side salvo8 torpedoes

16 wing tubes / 2 = 8: the launchers sit one per beam, so only half of them reach any one side. Each launcher reloads on its own, so she can fire one beam, turn, and fire the other without waiting.

Full-salvo damage234,128

All tubes hitting one target: tubes x per-torpedo simulated damage = 16 x 14,633 = 234,128. Each hit on the target's torpedo belt is reduced by its torpedo protection %.

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.

AA DPS layered by range19 DPS @ 3.5 km, 82 DPS @ 2.5 km, 230 DPS @ 2 km

@ 3.5 km: 19 from one family; @ 2.5 km: 63 + 19 = 82; @ 2 km: 63 + 74 + 74 + 19 = 230. 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

63 + 74 + 74 + 19 = 230 DPS: the sum of every family's average DPS, achievable only inside the closest-range family (2 km).

AA threat index520

63 × 2.5 + 74 × 2 + 74 × 2 + 19 × 3.5 = 520. 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 firepower

Max HE alpha1500

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

Max HE fire chance6%

The only family (102 mm): 6%. 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

The only family (102 mm): 17 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.

Open in Charting Tool

Ship Charts

Background

The most advanced British light cruiser among those designed during World War I. The ship's powerful propulsion allowed for high speeds. Her larger displacement helped strengthen the cruiser's artillery and torpedo armament as well as equip her with aircraft-handling gear.

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.

Bow & stern15 mm

Overmatched by 77+ 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.

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.

DefaultThe ship’s standard exterior
Luck of St. PatrickPermanent Camo

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

Emerald Community Stats

Playstyle

Overview

Positioning

Potato Avoidance

Signature Traits →

How to get Emerald

Builds

Cohort position

Peers in this cohort

Stats & specs

Under the hood

Main battery formulas

Model inputs

Torpedoes

AA defense

Secondary battery firepower

Ship Charts

Background

Armor Beta

Balance History

Holiday Update: Christmas on the Waves

Ministry of Balance: Italian Concerto

Skins & permanent camouflages

Primary official WG sources

Signature Traits