Dreadnought-class submarine vs Shallow Water Combat Submersible

FORCETALLY

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Dreadnought-class submarine — licensed concept illustration

ASubmarines

Dreadnought-class submarine

Nuclear-powered ballistic missile submarine

Concept illustration

Credit

Unknown author Unknown author · OGL 3 · Resized · OGL 3 · Source ↗ · Modified

Shallow Water Combat Submersible — licensed reference photograph

BSubmarines

Shallow Water Combat Submersible

Submersible , diver propulsion vehicle

Credit

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

First system

Second system

At a glance

Side by side

Length comparisonOne shared metre scale

Dreadnought-class submarineLength

153.6 m

Length source ↗

Shallow Water Combat SubmersibleLength

6.8 m

Length source ↗

Lengths retain their source configuration and measurement scope.

Dreadnought-class submarinelarger figure on 2 of 2

Length+2159%
Displacement+382122%

Shallow Water Combat Submersiblelarger figure on 0 of 2

None

Measured figures

Head to head

13 of 24 rows sourced on both sides

154m

6.8m

Length+2159%

All recorded figures & sources

153.6 m

Length

Single source

153.6 metres (504 ft)^[source]

6.8 m

Length

Single source

Configuration

Details

Dreadnought-class submarine and Shallow Water Combat Submersible configuration
Specification	Dreadnought-class submarine	Shallow Water Combat Submersible
Range	Limited only by food and mechanical components^[source]	—
Builders	BAE Systems , Barrow-in-Furness , England^[source]	Teledyne Brown Engineering^[source]
Operators	Royal Navy^[source]	United States Navy Royal Navy (planned)^[source]
Preceded by	Vanguard class^[source]	SEAL Delivery Vehicle^[source]

Cost	£ 31 billion (2016) (equivalent to £ 40.46 billion in 2024) lifetime cost of total programme (est.) £ 7.75 billion (2016) (equivalent to £ 10.12 billion in 2024) per unit (est.)^[source]	$383 million (program cost)^[source]

Built	First expected by early 2030s^[source]	—

Planned	4^[source]	—

Building	4^[source]	2^[source]

Active	0^[source]	—

Type	Nuclear-powered ballistic missile submarine^[source]	Submersible , diver propulsion vehicle^[source]

Propulsion	Rolls-Royce PWR3 nuclear reactor , turbo-electric drive, pump-jet^[source]	Lithium-ion batteries powering electric motors^[source]

Armament	4 × 21 inch (533 mm) torpedo tubes for: Spearfish heavyweight torpedoes 12 × ballistic missile tubes for: Lockheed Trident II D5 SLBMs^[source]	SEAL team personal weapons, limpet mines^[source]