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South Korea LIG Nex1
K761 Tiger Shark
South Korea's newest heavyweight submarine torpedo, succeeding the K731 White Shark with fiber-optic wire guidance, wake-homing and improved counter-countermeasure resistance. Development ran 2009-2019, entered mass production in 2022 and reached full operational capability by the end of that year, arming Republic of Korea Navy KSS-II and KSS-III submarines alongside the C-Star anti-ship missile.
1 operator countries
Compiled from public sources ·primary reference ↗ ·last verified 2026-08-02
💲 ≈ $2,600,000 (public figure)
Procurement snapshot
Availability & export
ROK export-licensed
DAPA-administered; aggressive export posture with financing/offset packages.
Channel: Government-to-government
Fielded & proven
Limited · 1 operator
Status: active.
Lifecycle cost (est.)
Unit cost known; one-shot / small-arms class has no meaningful O&S tail to model.
Interoperability
No standardised NATO calibre / datalink detected in public specs.
Derived guidance from public data, export regime by country of origin, lifecycle from the GAO ~30% acquisition rule. Verify eligibility, pricing and offsets with the manufacturer and your acquisition authority.
Full specifications
Firepower
Armament, payload and guidance.
| Guidance How the weapon finds its target: inertial, GPS/GLONASS, active/semi-active radar, infrared, laser, TV, wire. | Fiber-optic wire guidance, Wake-homing |
|---|
Physical
Dimensions, weight and crew.
| Length Overall length including gun/probe where applicable. | 6.5 m |
|---|
Propulsion
Engine, power and fuel.
| Propulsion type Turbofan, turboshaft, diesel, gas turbine, solid-fuel rocket, ramjet… | Electric motor, lithium battery |
|---|
Munition
Round type, penetration, velocity and projectile data.
| Round type APFSDS (kinetic sabot), HEAT / multipurpose, HE-FRAG, canister or gun-launched ATGM. | Heavyweight submarine-launched torpedo |
|---|---|
| Projectile mass Mass of the projectile or penetrator assembly. | 1,619 kg |
| Effective range Practical engagement range of the round. | 50,000 m |
Program
Cost, production scale and operators.
| Unit cost Approximate flyaway/unit cost where public. Defense pricing varies hugely by contract, offsets and configuration. Lower is cheaper. | $2,600,000 |
|---|---|
| Operator countries Number of countries operating the system. More operators means broader support ecosystem. | 1 |
Specifications compiled from public LIG Nex1 and reference sources ↗. Published defense figures are approximations, treat comparisons as directional. Last verified 2026-08-02.
Compare with rivals
See how it stacks up
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Raytheon (RTX) Mk 46 Frequently asked questions
How many countries operate the LIG Nex1 K761 Tiger Shark? +
The LIG Nex1 K761 Tiger Shark is operated by 1 countries.
How much does the LIG Nex1 K761 Tiger Shark cost? +
The LIG Nex1 K761 Tiger Shark has an approximate unit cost of 2,600,000 USD. Defense pricing varies by contract, offsets and configuration, treat this as directional.
