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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.
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.
- Torpedo tubes
Number of torpedo tubes (submarines and some surface ships).
- 8 Stronger than 88% of submarines
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 Top 6% of submarines
- Units built
Total production run. Higher means proven manufacturing, mature logistics and spares availability.
- 12 Stronger than 69% of submarines
- Operator countries
Number of countries operating the system. More operators means broader support ecosystem.
- 2 Stronger than 82% of submarines
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
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Rubin Design Bureau Borei-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.
