Shallow Water Combat Submersible vs Sinpo-class submarine

Shallow Water Combat Submersible — licensed reference photograph

ASubmarines

Shallow Water Combat Submersible

Submersible , diver propulsion vehicle

Credit

CAPT Kate Dollof · Public domain · Resized · Public domain · Source ↗ · Modified

AI-generated illustration · Not a photograph — Representative exterior of Sinpo-class submarine

BSubmarines

Sinpo-class submarine

Diesel submarine

AI-generated illustration · Not a photograph

Credit

ForceTally · AI-generated illustration · Not a photograph · AI-generated · OpenAI output terms · Source ↗ · Modified

First system

Second system

At a glance

Side by side

Length comparisonOne shared metre scale

Shallow Water Combat SubmersibleLength

6.8 m

Length source ↗

Sinpo-class submarineestimated

70 m

Length source ↗

Lengths retain their source configuration and measurement scope.

Measured figures

Head to head

14 of 25 rows sourced on both sides

6.8m

70mestimated

Length

All recorded figures & sources

6.8 m

Length

Single source

6.8 meters (22 ft)^[source]

70 m

estimated

Single source

65 m

lwl estimated

Single source

70 m (229 ft 8 in) (estimated) 65 m (213 ft 3 in) ( lwl estimated)^[source]

1.5m

7mestimated

Beam

All recorded figures & sources

1.5 m

Beam

Single source

1.5 meters (4.9 ft)^[source]

7 m

estimated

Single source

7 m (23 ft 0 in) (estimated)^[source]

1.5mDraft

—

Draught

All recorded figures & sources

1.5 m

Draft

Single source

1.5 meters (4.9 ft)^[source]

Submerged 1,650 -2,000 tons

Displacement

All recorded figures & sources

4.5 tonnes

Displacement

Single source

4.5 tonnes (5.0 short tons)^[source]

Submerged 1,650 -2,000 tons^[source]

—

30–50peopleestimated

Crew

All recorded figures & sources

30–50 people

estimated

Single source

30–50 (estimated)^[source]

62 crew, 4 passengers

70–80peopleestimated

ComplementScopes differ

All recorded figures & sources

6 people

2 crew, 4 passengers

Single source

6 (2 crew, 4 passengers)^[source]

70–80 people

estimated

Single source

70–80 (estimated)^[source]

11km/hMaximum; Speed

30km/hMaximum; estimated on surface

SpeedScopes differ

All recorded figures & sources

11 km/h

Maximum; Speed

Single source

6 kn (11 km/h)^[source]

19 km/h

Maximum; dived. (estimated)

Single source

30 km/h

Maximum; estimated on surface

Single source

(estimated) 16 knots (30 km/h; 18 mph) on surface 10 knots (19 km/h) dived. (estimated)^[source]

—

2,800kmestimated

Range

All recorded figures & sources

2,800 km

estimated

Single source

1,500 nmi (2,800 km; 1,700 mi) (estimated)^[source]

12h

—

Endurance

All recorded figures & sources

12 h

Endurance

Single source

12 hours^[source]

Bars compare reported quantities only. A larger figure does not make a system better; configurations and test conditions differ.

Configuration

Details

Shallow Water Combat Submersible and Sinpo-class submarine configuration
Specification	Shallow Water Combat Submersible	Sinpo-class submarine
Builders	Teledyne Brown Engineering^[source]	Sinpo South Shipyard^[source]
Operators	United States Navy Royal Navy (planned)^[source]	Korean People's Navy^[source]
Preceded by	SEAL Delivery Vehicle^[source]	Sang-O class^[source]
Cost	$383 million (program cost)^[source]	—
On order	7 USN, 3 RN^[source]	—
Building	2^[source]	1^[source]
Completed	2^[source]	1^[source]
Type	Submersible , diver propulsion vehicle^[source]	Diesel submarine^[source]
Propulsion	Lithium-ion batteries powering electric motors^[source]	Diesel-electric (?)^[source]
Test depth	>190 feet (58 m)^[source]	—
Sensors & processing systems	Inertial navigation system , high-frequency sonar for obstacle/mine avoidance and navigation, GPS^[source]	—
Armament	SEAL team personal weapons, limpet mines^[source]	Pukguksong-1 (KN-11) Sinpo-C: 3 × Pukguksong-3 Hero Kim Kun Ok : 10 × Pukguksong-3 or 4 × Pukguksong-3 and 6 × smaller SLBM^[source]
Country of origin	United States^[source]Inventory Origin column; table 2, row 5, cell 2; revision 1373375989; retrieved 2026-09-30	North Korea^[source]
Succeeded by	—	Sinpo-C-class submarine^[source]
Planned	—	3 or more^[source]
Active	—	1^[source]

FORCETALLY

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Shallow Water Combat Submersible

Sinpo-class submarine

Builders

Teledyne Brown Engineering^[source]

Sinpo South Shipyard^[source]

Operators

United States Navy Royal Navy (planned)^[source]

Korean People's Navy^[source]

Preceded by

SEAL Delivery Vehicle^[source]

Sang-O class^[source]

Cost

$383 million (program cost)^[source]

—

On order

7 USN, 3 RN^[source]

—

Building

Completed

Type

Submersible , diver propulsion vehicle^[source]

Diesel submarine^[source]

Propulsion

Lithium-ion batteries powering electric motors^[source]

Diesel-electric (?)^[source]

Test depth

>190 feet (58 m)^[source]

—

Sensors & processing systems

Inertial navigation system , high-frequency sonar for obstacle/mine avoidance and navigation, GPS^[source]

—

Armament

SEAL team personal weapons, limpet mines^[source]

Pukguksong-1 (KN-11) Sinpo-C: 3 × Pukguksong-3 Hero Kim Kun Ok : 10 × Pukguksong-3 or 4 × Pukguksong-3 and 6 × smaller SLBM^[source]

Country of origin

United States^[source]Inventory Origin column; table 2, row 5, cell 2; revision 1373375989; retrieved 2026-09-30

North Korea^[source]

Succeeded by

—

Sinpo-C-class submarine^[source]

Planned

—

3 or more^[source]

Active

—

1^[source]