Attack Submarine
[ SUBMARINES ] // ATTACK SUBMARINE ▼
[SYSTEM_DOSSIER // SUB-01] // HUNTER-KILLER ATTACK SUBMARINE
Attack Submarine
A stealth hunter-killer built to find, chase and destroy enemy submarines and surface ships. It fights best in deep water, carries cruise-missile launch capability, can reveal stealth submarines, and becomes progressively more dangerous as range and sensor coverage improve. Its major weakness is shallow coastal water, where combat efficiency and survivability fall sharply.
DossierSUB-ATK-01
ClassATTACK SUBMARINE
Levels1–6 VERIFIED
Doctrines3 VERIFIED
Primary RoleHUNTER-KILLER / ASW
WesternL1–L6 verified
EasternL1–L6 verified
EuropeanL1–L6 verified
Submarines01 / 03 LIVE
Operational Identity
Primary Fight
Surface + Submarine
The verified attack and defense values are concentrated on surface ships and submarines.
Deep Water
+25% ATK
All three doctrine screenshots show the deep-water attack bonus.
Stealth Package
Stealth + Reveal
Stealth Unit and Reveal Stealth: Submarines are both confirmed properties.
Cruise Missiles
12H Reload
Confirmed capacity: 1 at L1 and 2 at L5; no unsupported intermediate values are inferred.
// Tactical Read //
● DEEP-WATER HUNTER
Strength
Excellent anti-ship and anti-submarine pressure with stealth, submarine detection and improving engagement range.
Weakness
Shallow water is dangerous: Western and European suffer -25% ATK / -25% DEF, while Eastern reduces those penalties to -15% / -15%.
Doctrine Split
Western extends sensors, Eastern increases damage and softens terrain penalties, European cuts mobilization cost and upkeep.
Doctrine Profiles
[DOC-W // WESTERN]
Western Doctrine
Los Angeles → Seawolf → Virginia
Doctrine Advantage
+15% Radar & Sonar Range
-10% research cost and time.
-10% research cost and time.
Research Days
1 / 4 / 9 / 11 / 20 / 22
Sensor Curve
85 early → 115 from L4.
[DOC-E // EASTERN]
Eastern Doctrine
Viktor → Akula → Yasen
Doctrine Advantage
+10% Damage
Reduced terrain penalties.
Reduced terrain penalties.
Research Days
1 / 4 / 9 / 11 / 20 / 22
Coastal Penalty
-15% ATK / -15% DEF instead of -25% / -25%.
[DOC-EU // EUROPEAN]
European Doctrine
Swiftsure → Rubis → Astute
Doctrine Advantage
-10% Mobilization Cost
50% upkeep.
50% upkeep.
Research Days
1 / 4 / 9 / 11 / 20 / 22
Economy
Lowest verified production and upkeep burden of the three doctrine lines.
Doctrine Research Timing
| Level | Western | Eastern | European |
|---|---|---|---|
| L1 | Day 1 | Day 1 | Day 1 |
| L2 | Day 4 | Day 4 | Day 4 |
| L3 | Day 9 | Day 9 | Day 9 |
| L4 | Day 11 | Day 11 | Day 11 |
| L5 | Day 20 | Day 20 | Day 20 |
| L6 | Day 22 | Day 22 | Day 22 |
Shared Hull Progression
| Level | HP Deep | HP Shallow | Deep SPD | Shallow SPD | Sight | Engagement Range |
|---|---|---|---|---|---|---|
| L1 | 20 | 10 | 3.5 | 1.75 | 25 | 50 |
| L2 | 25 | 12.5 | 3.5 | 1.75 | 25 | 50 |
| L3 | 25 | 12.5 | 3.5 | 1.75 | 25 | 50 |
| L4 | 30 | 15 | 3.5 | 1.75 | 25 | 75 |
| L5 | 30 | 15 | 3.5 | 1.75 | 25 | 75 |
| L6 | 40 | 20 | 3.5 | 1.75 | 25 | 100 |
Coastal Water Is The Main Risk
The terrain panel shows only half of the deep-water HP in shallow water. Western and European also take -25% ATK and -25% DEF there; Eastern cuts those combat penalties to -15% / -15%. Deep water gives every doctrine +25% ATK.
Surface / Submarine Combat Progression
| Level | Western ATK/DEF | Eastern ATK/DEF | European ATK/DEF |
|---|---|---|---|
| L1 | Surface 8 · Sub 5 | Surface 8.8 · Sub 5.5 | Surface 8 · Sub 5 |
| L2 | Surface 8.5 · Sub 5.5 | Surface 9.4 · Sub 6.1 | Surface 8.5 · Sub 5.5 |
| L3 | Surface 9 · Sub 6 | Surface 9.9 · Sub 6.6 | Surface 9 · Sub 6 |
| L4 | Surface 10 · Sub 10 | Surface 11 · Sub 11 | Surface 10 · Sub 10 |
| L5 | Surface 10.5 · Sub 10.5 | Surface 11.6 · Sub 11.6 | Surface 10.5 · Sub 10.5 |
| L6 | Surface 15 · Sub 12 | Surface 16.5 · Sub 13.2 | Surface 15 · Sub 12 |
Sensor Progression
| Level | Western Radar/Sonar | Eastern Radar/Sonar | European Radar/Sonar |
|---|---|---|---|
| L1 | 85 | 75 | 75 |
| L2 | 85 | 75 | 75 |
| L3 | 85 | 75 | 75 |
| L4 | 115 | 100 | 100 |
| L5 | 115 | 100 | 100 |
| L6 | 115 | 100 | 100 |
Production Progression
| Level | Western / Eastern Costs | European Costs | Mobilization | Western / Eastern Upkeep | European Upkeep |
|---|---|---|---|---|---|
| L1 | 700 / 450 / 250 / 1250 / 1750 | 650 / 400 / 250 / 1150 / 1600 | 1 day | 30 / 50 / 35 / 125 | 15 / 25 / 20 / 65 |
| L2 | 700 / 450 / 250 / 1250 / 1750 | 650 / 400 / 250 / 1150 / 1600 | 1d 1h | 35 / 60 / 40 / 140 | 20 / 30 / 20 / 70 |
| L3 | 700 / 450 / 250 / 1250 / 1750 | 650 / 400 / 250 / 1150 / 1600 | 1d 2h | 40 / 45 / 160 | 20 / 25 / 80 |
| L4 | 800 / 675 / 500 / 1500 / 2250 | 700 / 600 / 450 / 1350 / 2050 | 1d 4h | 50 / 55 / 180 | 25 / 30 / 90 |
| L5 | 800 / 675 / 500 / 1500 / 2250 | 700 / 600 / 450 / 1350 / 2050 | 1d 5h | 55 / 60 / 200 | 30 / 30 / 100 |
| L6 | 950 / 900 / 750 / 1750 / 3000 | 850 / 800 / 700 / 1600 / 2700 | 1d 7h | 65 / 70 / 220 | 35 / 35 / 110 |
Confirmed Special Mechanics
Stealth Unit
Confirmed popup: while the unit is not in combat, it is not visible.
Reveal Stealth
Confirmed to reveal submarines inside detection range.
Cruise Missiles
Confirmed popup values: L1 capacity 1 / reload 12h and L5 capacity 2 / reload 12h.
Doctrine Shared
The supplied property popups use the same mechanics for Western, Eastern and European doctrine variants.
// Final Player Verdict //
● CONTROL THE DEEP WATER
Best Use
Patrol deep-water routes, screen fleets against submarines and punish exposed surface ships before they can close distance.
Best Doctrine For Damage
Eastern has the highest verified surface/submarine numbers and suffers smaller coastal combat penalties.
Do Not Waste It
Avoid lingering in shallow coastal water. The unit’s strongest advantages are stealth, range, detection and deep-water combat.