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South Korea Hanwha Ocean (formerly Daewoo Shipbuilding & Marine Engineering)
Chang Bogo-class submarine
South Korea's first modern submarine class, license-built from the German Type 209/1200 design and later exported to Indonesia as the Nagapasa class. It provided the industrial foundation for South Korea's subsequent indigenous submarine programs, with 9 boats built for the Republic of Korea Navy and 3 for Indonesia.
In service since 1993 · 2 operator countries
Compiled from public sources ·primary reference ↗ ·last verified 2026-07-02
500
m depth
21.5
kn
1,300
t
33
crew
💲 ≈ $373,000,000, Nagapasa Batch-1 export unit price (2011); Batch-2 (2019) approximately $340 million
Procurement snapshot
Availability & export
ROK export-licensed
DAPA-administered; aggressive export posture with financing/offset packages.
Channel: Government-to-government
Fielded & proven
Limited · 2 operators
In service since 1993. Status: active · ~12 built.
Lifecycle cost (est.)
$933M – $1.3B
Acquisition is only ~30% of lifecycle cost, operating & support dominate over ~30 yrs. Rough 2.5–3.5× the unit price. How we estimate this →
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.
Compatible munitions & weapons
Publicly reported weapons the Chang Bogo-class submarine can carry. Linked items have a full spec page.
Full specifications
Firepower
Armament, payload and guidance.
| Torpedo tubes Number of torpedo tubes (submarines and some surface ships). | 8 |
|---|
Physical
Dimensions, weight and crew.
| Length Overall length including gun/probe where applicable. | 56 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. | $373,000,000 |
|---|---|
| Units built Total production run. Higher means proven manufacturing, mature logistics and spares availability. | 12 |
| Operator countries Number of countries operating the system. More operators means broader support ecosystem. | 2 |
Specifications compiled from public Hanwha Ocean (formerly Daewoo Shipbuilding & Marine Engineering) and reference sources ↗. Published defense figures are approximations, treat comparisons as directional. Last verified 2026-07-02.
Compare with rivals
See how it stacks up
Rotterdamsche Droogdok Maatschappij (RDM) Walrus class 
Naval Group Suffren class Frequently asked questions
What is the Hanwha Ocean (formerly Daewoo Shipbuilding & Marine Engineering) Chang Bogo-class submarine used for? +
The Hanwha Ocean (formerly Daewoo Shipbuilding & Marine Engineering) Chang Bogo-class submarine is a submarine typically used for anti ship.
How many countries operate the Hanwha Ocean (formerly Daewoo Shipbuilding & Marine Engineering) Chang Bogo-class submarine? +
The Hanwha Ocean (formerly Daewoo Shipbuilding & Marine Engineering) Chang Bogo-class submarine is operated by 2 countries.
How much does the Hanwha Ocean (formerly Daewoo Shipbuilding & Marine Engineering) Chang Bogo-class submarine cost? +
The Hanwha Ocean (formerly Daewoo Shipbuilding & Marine Engineering) Chang Bogo-class submarine has an approximate unit cost of 373,000,000 USD. Defense pricing varies by contract, offsets and configuration, treat this as directional.
