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I.K.S. Bortas is a Tier VI British AP-only cruiser with strong AP DPM (310,000): 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. She also packs the super-heal, but the kit is offense first, sustain second. Sonar (4.2 km on ships and 3 km on torpedoes, 94 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. Standout traits: best AP always-pen window in T6 CAs (60°) and best AP guaranteed-ricochet angle in T6 CAs (75°).
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.
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.
26.0 mm best HE pen across secondary families, best of T6 CAs. Pens hull plates peers' secondaries shatter on.
Repair Party heals 2.0%/s, best of T6 CAs. Restores more HP per active second than peers.
~8.9 s to 90% of top speed, top decile of T6 CAs. Rebuilds speed quickly after a turn or stop, and sustains acceleration through the mid-range.
I.K.S. Bortas is a Premium ship and not available to unlock in the Tech Tree. Acquisition path: Containers. 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 I.K.S. Bortas sits among Tier VI CAs (43 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 I.K.S. Bortas -- 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 · 60 s reload · 5 s active
Repair Party2 charges · 80 s reload · 20 s active · 12,560 HP (40% of max HP) total heal (per charge) 
Sonar2 charges · 180 s reload · 94 s active · 4.2 km ship detect 
Defensive AA Fire3 charges · 140 s reload · 25 s active · +100% flak burst boostAll 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: $\sigma_H = \left(\dfrac{R}{30}\cdot\dfrac{\text{idealRadius}-\text{minRadius}}{\text{idealDistance}} + \text{minRadius}\right)\cdot 30$ $= \left(\dfrac{11500}{30}\cdot\dfrac{8-1.1}{1000} + 1.1\right)\cdot 30 = 112.4\,\text{m}$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: $\sigma_V = \sigma_H \cdot \text{radiusOnMax}$ $= 112.4 \cdot 0.6 = 67.4\,\text{m}$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: $\sigma_{H,50} = \sigma_H \cdot \text{GetHalfHitsRatio}(\sigma)$ $= 112.4 \cdot 0.319\;(\sigma = 2) = 35.9\,\text{m}$50%-hit vertical radius: $\sigma_{V,50} = \sigma_V \cdot \text{GetHalfHitsRatio}(\sigma)$ $= 67.4 \cdot 0.319\;(\sigma = 2) = 21.5\,\text{m}$Canonical community AP formula (jcw780/wows_shell), evaluated at muzzle velocity: $P = 10^{-7}\cdot K \cdot m^{0.69} \cdot d^{-1.07} \cdot v_0^{1.38}$ $= 10^{-7}\cdot 2609 \cdot 50.8^{0.69} \cdot 0.152^{-1.07} \cdot 841^{1.38} = 320\,\text{mm}$. Matches the in-game spec card.Same formula at the ship's max firing range (15.8 km), where the shell has slowed to 317.6 m/s: $P = 10^{-7}\cdot 2609 \cdot 50.8^{0.69} \cdot 0.152^{-1.07} \cdot 317.6^{1.38} = 83.5\,\text{mm}$.floor(152 mm caliber / 6): standard HE penetration.floor(152 mm caliber / 14.3) = 10 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 12 barrels bear on the broadside.180 degrees / 7 deg/s traverse speed = 25.7 s.3,100 AP damage x 12 broadside guns = 37,200.37,200 AP full-salvo alpha x 60 / 8 s base reload = 279,000.12 broadside guns x 60 / 8 s base reload = 90.detectability / (speed kt x 2.6 community game-speed factor).range / (speed kt x 2.6 community game-speed factor).2 launchers x 3 tubes.tube count / 2 (symmetric port/starboard launcher layout; common on cruisers and battleships with deck torpedoes).All tubes hitting one target: tubes x per-torpedo simulated damage = 6 x 16,000 = 96,000.One side firing, all torpedoes hitting: per-side tubes x per-torpedo simulated damage = 3 x 16,000 = 48,000.Sum across every AA aura on this ship of (aura.continuous_damage x 3.5 x aura.hit_probability). Here: (31×3.5×0.9) + (48×3.5×0.85) + (23×3.5×0.9) = 313. 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) × 57 + 30. Each dispersion type sets its own slope; this is not a percentage applied to a standard baseline.6.5 km × 57 + 30 = 400.5 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: 4×2 102 mm (4/side) × 60/3 × 1500 = 120,000. 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: 1500 from the 102 mm family.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.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: 26 mm from the 102 mm family.Hull HP 31,400, 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 177+ guns across the bracket. Can’t reliably bow-tank; gets bow-citadelled and overpenned.
Thin belt: battleship AP citadels straight through it broadside. Rely on angle, speed and concealment, never sit flat.
Superstructure and extremities take HE pens and AP overpens from nearly any gun: steady chip damage. Fire resistance 30%, fires burn 45s. Range-by-range in the ballistics tool →
| Section | Plates | HP cap | Threats | Tactic |
|---|---|---|---|---|
| Bow | 13 mm primary (range 13–20 mm) | ≈ 1,570 (~5% of HP) | Overmatched by 203mm+ (Aoba, Baleares)Angle bounces 152mm13 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) | 51 mm primary (range 19–51 mm) | ≈ 23,550 (~75% of HP) | No common caliber overmatches51 mm: most HE shatters, standard pen from 356mm+ | Largest HP pool. Citadel sits behind these plates; thinner deck and side plating absorb the rest. |
| Stern | 13 mm primary (range 13–38 mm) | ≈ 1,570 (~5% of HP) | Overmatched by 203mm+ (Aoba, Baleares)Angle bounces 152mm13 mm: HE pens from 127mm+ | Mirror of bow. Same fast saturation. |
| Citadel | 114 mm primary (range 9–114 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 | 10 mm primary (range 10–114 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 I.K.S. Bortas 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.