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Massachusetts B is a Tier VII American all-rounder battleship with 406mm guns at 17 km: she has no single dominant kit trait but is competent across the board. The role flexes by team comp - mid-range AP anchor by default, brawl support when the team commits, sniper when the line sits back. Versatility is the value, not specialization. Standout traits: best DCP duration in T7 BBs (20 s) and top-decile torpedo belt percent in T7 BBs (46).
Anchor a flank at 14-17 km with bow toward the closest threat. Rotate one or two map cells with the team rather than holding solo; a battleship alone on a flank is a free focus target for the enemy.
A battleship caught broadside by two same-tier guns at mid range loses more HP than any single salvo trades back, so rotate with the team or hold your angle instead of charging in first.
20.0 s Damage Control duration, best of T7 BBs. Stays fire / flood immune longer per activation.
46.0% torpedo damage reduction, top decile of T7 BBs.
Improved secondary dispersion bracket (slope 27.0), top decile of T7 BBs. The bracket determines per-meter-of-range dispersion; lower slope = tighter cone.
701.0 m/s AP muzzle velocity, bottom decile of T7 BBs. Lobby trajectory, more lead, easier to dodge at range.
5.0% best HE fire chance per secondary shell, bottom quartile of T7 BBs. Lights fewer fires in a brawl than peers.
Massachusetts B is a Premium ship and not available to unlock in the Tech Tree. Acquisition paths: Containers and Campaign. 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.
Pair with a commander whose unique skill complements her main armament; check the build tool for current recommendations.
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Where Massachusetts B sits among Tier VII BBs (48 ships). Notable standouts are shown first; the rest of the cohort-ranked stats are in the expand below. Acquisition variants (Black Friday, Founders Edition) are counted once with their base ship, not as separate peers.
Not standouts for Massachusetts B -- here's where she sits on every other ranked stat in the cohort. Stats tagged NORM are tied across more than half the cohort, so the value is the cohort default rather than a standout.
Damage Control Party∞ charges · 80 s reload · 20 s active
Repair Party3 charges · 80 s reload · 28 s active · 9,282 HP (14% of max HP) total heal (per charge) 
Catapult Fighter4 charges · 80 s reload · 90 s active · 5 km patrol radius 
Observation Seaplane4 charges · 200 s reload · 30 s active · 1 squadron size · Tightens main-battery shell grouping
Secondary Battery Booster3 charges · 160 s reload · 30 s active · +100% grouping · -50% dispersionAll 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.
Horizontal dispersion ellipse width at max range, from the verified WoWS dispersion model: $\sigma_H = \left(\dfrac{R}{30}\cdot\dfrac{\text{idealRadius}-\text{minRadius}}{\text{idealDistance}} + \text{minRadius}\right)\cdot 30$ $= \left(\dfrac{17000}{30}\cdot\dfrac{12-2}{1000} + 2\right)\cdot 30 = 230\,\text{m}$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.Vertical dispersion ellipse height at max range: $\sigma_V = \sigma_H \cdot \text{radiusOnMax}$ $= 230 \cdot 0.6 = 138\,\text{m}$How tall the same scatter ellipse is at 10 km. Comparable from ship to ship for the same reason as the width value above.50%-hit horizontal radius: $\sigma_{H,50} = \sigma_H \cdot \text{GetHalfHitsRatio}(\sigma)$ $= 230 \cdot 0.344\;(\sigma = 1.8) = 79.1\,\text{m}$50%-hit vertical radius: $\sigma_{V,50} = \sigma_V \cdot \text{GetHalfHitsRatio}(\sigma)$ $= 138 \cdot 0.344\;(\sigma = 1.8) = 47.5\,\text{m}$Canonical community AP formula (jcw780/wows_shell), evaluated at muzzle velocity: $P = 10^{-7}\cdot K \cdot m^{0.69} \cdot d^{-1.07} \cdot v_0^{1.38}$ $= 10^{-7}\cdot 2598 \cdot 1225^{0.69} \cdot 0.406^{-1.07} \cdot 701^{1.38} = 778.8\,\text{mm}$. Matches the in-game spec card.Same formula at the ship's max firing range (21.2 km), where the shell has slowed to 468.4 m/s: $P = 10^{-7}\cdot 2598 \cdot 1225^{0.69} \cdot 0.406^{-1.07} \cdot 468.4^{1.38} = 446.5\,\text{mm}$.68 mm ≈ 406 mm caliber / 6 (standard HE penetration ratio).floor(406 mm caliber / 14.3) = 28 mm (AP auto-penetrates plating this thick or less).AP shell over-penetration splash radius; scales with shell mass. Wickes 102mm = 3, standard 152mm CL ~ 20, Iowa 406mm ~ 270, Yamato 460mm = 400, Incomparable 650mm = 550 (max). Larger value = bigger splash damage area when AP over-pens.All 9 barrels bear on the broadside.180 degrees / 4 deg/s traverse speed = 45 s.5,700 HE damage x 9 broadside guns = 51,300.13,100 AP damage x 9 broadside guns = 117,900.51,300 HE full-salvo alpha x 60 / 30 s base reload = 102,600.117,900 AP full-salvo alpha x 60 / 30 s base reload = 235,800.51,300 HE full-salvo alpha x 60 / 27 s installed reload (Main Battery Mod. 3 = -10%) = 114,000.117,900 AP full-salvo alpha x 60 / 27 s installed reload (Main Battery Mod. 3 = -10%) = 262,000.9 broadside guns x 60 / 30 s base reload = 18.9 broadside guns x 60 / 27 s installed Artillery reload = 20.18 shells/min x 36% fire chance = 6.48.20 shells/min x 36% fire chance = 7.2.Sum across every AA aura on this ship of (aura.continuous_damage x 3.5 x aura.hit_probability). Here: (112×3.5×0.75) + (68×3.5×0.7) + (50×3.5×0.75) = 592. Covers AA-only mounts plus dual-purpose secondaries (Bismarck 105mm, USN 5"/38 cruiser secondaries) and dual-purpose main batteries (Sumner-class 5"/38, Akizuki-line 100mm). Formula validated against in-game captures on California, Sumner, Manfred von Richthofen, Dante Alighieri (exact) and within +/-17% on the remaining verified ships.Longest-reaching aura across AA-only + dual-purpose auras.SUM over AA auras of (aura DPS x aura range km). A plane crossing the AA bubble is exposed to each aura for a time proportional to that aura's range, so long-reach DPS is worth more than the same DPS in a short bubble. Units: DPS*km; used to rank overall AA threat across the cohort.Max dispersion = range (km) × 27 + 30. Each dispersion type sets its own slope; this is not a percentage applied to a standard baseline.7 km × 27 + 30 = 219 m.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: 10×2 127 mm (10/side) × 60/6 × 1800 = 180,000. Assumes every shell hits (real hit rate is lower; the Brawl matchup tool on the Compare page folds in dispersion + target armor).Maximum HE damage per shell across secondary HE families. Best on this ship: 1800 from the 127 mm family.Maximum per-shell fire chance across secondary HE families (before target fire resistance is applied). Best on this ship: 5% from the 127 mm family.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: 21 mm from the 127 mm family.Hull HP 66,300, 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.
Overmatched by only MusashiARP Musashi. Angled, everything else bounces.
Citadels come from a flat broadside at close range; held past ~30° of angle, AP shatters or bounces.
Superstructure and extremities take HE pens and AP overpens from nearly any gun: steady chip damage. Fire resistance 37%, fires burn 60s. Range-by-range in the ballistics tool →
| Section | Plates | HP cap | Threats | Tactic |
|---|---|---|---|---|
| Bow | 32 mm primary (range 32–50 mm) | ≈ 3,315 (~5% of HP) | Overmatched by 460mm+ (Aki, Musashi)Angle bounces 410mm32 mm: HE pens from 203mm+ | Bow-tank fits behind this exterior plate. Saturation is FAST here; the cap is often only a few thousand HP. |
| Hull (midship) | 32 mm primary (range 6–439 mm) | ≈ 49,725 (~75% of HP) | Overmatched by 460mm+ (Aki, Musashi)Angle bounces 410mm32 mm: HE pens from 203mm+ | Largest HP pool. Citadel sits behind these plates; thinner deck and side plating absorb the rest. |
| Stern | 32 mm primary (range 32–343 mm) | ≈ 3,315 (~5% of HP) | Overmatched by 460mm+ (Aki, Musashi)Angle bounces 410mm32 mm: HE pens from 203mm+ | Mirror of bow. Same fast saturation. |
| Citadel | 310 mm primary (range 38–274 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.
Every custom exterior Massachusetts B can equip, from in-game data.
Filtered to official World of Warships: Legends pages where this ship is a focus, reward, line member, or high-context variant mention.