Shallow Water Combat Submersible vs Upholder/Victoria-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

Upholder/Victoria-class submarine — licensed reference photograph

BSubmarines

Upholder/Victoria-class submarine

Diesel-electric submarine (Hunter Killer SSK )

Credit

Peter Burghart · Public domain · Resized · Public domain · 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 ↗

Upholder/Victoria-class submarineLength

70.26 m

Length source ↗

Lengths retain their source configuration and measurement scope.

Shallow Water Combat Submersiblelarger figure on 0 of 3

None

Upholder/Victoria-class submarinelarger figure on 3 of 3

Length+933%
Beam+380%
Displacement+54456%

Counts only measures both sources give with the same scope. A larger figure is not a better system.

Measured figures

Head to head

16 of 28 rows sourced on both sides

6.8m

70.26m

Length+933%

All recorded figures & sources

6.8 m

Length

Single source

6.8 meters (22 ft)^[source]

70.26 m

Length

Single source

70.26 m (230 ft 6 in)^[source]

1.5m

7.2m

Beam+380%

All recorded figures & sources

1.5 m

Beam

Single source

1.5 meters (4.9 ft)^[source]

7.2 m

Beam

Single source

7.2 m (23 ft 7 in)^[source]

1.5mDraft

7.6m

Draught

All recorded figures & sources

1.5 m

Draft

Single source

1.5 meters (4.9 ft)^[source]

7.6 m

Draught

Single source

7.6 m (24 ft 11 in)^[source]

2,455t

Displacement+54456%

All recorded figures & sources

4.5 tonnes

Displacement

Single source

4.5 tonnes (5.0 short tons)^[source]

2,455 tonnes

Displacement

Single source

2,455 t (2,416 long tons)^[source]

62 crew, 4 passengers

Complement

All recorded figures & sources

6 people

2 crew, 4 passengers

Single source

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

59 people

Complement

Single source

59^[source]

11km/hMaximum; Speed

37km/hMaximum; + (submerged)

SpeedScopes differ

All recorded figures & sources

11 km/h

Maximum; Speed

Single source

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

37 km/h

Maximum; + (submerged)

Single source

22 km/h

Maximum; Surfaced

Single source

12 knots (22 km/h; 14 mph) (surface) 20 knots (37 km/h; 23 mph)+ (submerged)^[source]

—

19,000kmat snorkelling depth

Range

All recorded figures & sources

15,000 km

at 8 kn (15 km/h; 9.2 mph)

Single source

19,000 km

at snorkelling depth

Single source

8,000 nmi (15,000 km; 9,200 mi) at 8 kn (15 km/h; 9.2 mph) 10,000 nmi (19,000 km; 12,000 mi) at snorkelling depth^[source]

12h

30 days

Endurance

All recorded figures & sources

12 h

Endurance

Single source

12 hours^[source]

30 days^[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 Upholder/Victoria-class submarine configuration
Specification	Shallow Water Combat Submersible	Upholder/Victoria-class submarine
Power	—	Diesel-electric – 1 shaft 2 × Paxman Valenta 2,035 hp (1.517 MW) 1600 RPA SZ diesels 1 × GEC electric motor (5 MW)^[source]
Builders	Teledyne Brown Engineering^[source]	VSEL, Ltd and Cammell Laird Co.^[source]
Operators	United States Navy Royal Navy (planned)^[source]	Royal Navy Royal Canadian Navy^[source]
Preceded by	SEAL Delivery Vehicle^[source]	Oberon class^[source]
Cost	$383 million (program cost)^[source]	—
On order	7 USN, 3 RN^[source]	—
Building	2^[source]	—
Completed	2^[source]	4^[source]
Type	Submersible , diver propulsion vehicle^[source]	Diesel-electric submarine (Hunter Killer SSK )^[source]
Propulsion	Lithium-ion batteries powering electric motors^[source]	—
Test depth	>190 feet (58 m)^[source]	Over 656.17 ft (200 m)^[source]
Sensors & processing systems	Inertial navigation system , high-frequency sonar for obstacle/mine avoidance and navigation, GPS^[source]	Lockheed Martin CCS 876 combat system Submarine-Launched Expendable Bathythermograph (SSXBT): Lockheed Martin Mk-8 Bathythermograph Periscope : Thales Group CK-35/CH-85 Sonar : Lockheed Martin AN/BQQ-10(v)7 Sonar System Type 2040 active/passive bow multibeam echo sounder with Lockheed Martin Echo Sounder Interface BQG-501 micropuffs Type 2007 flank Ultra Electronics Submarine Towed Array Sonar System (SubTASS) Type 2019 active intercept Fire Control : Lockheed-Martin Librascope SFCS Mk 1 Mod C Radar : Kelvin Hughes KH-1007^[source]
Armament	SEAL team personal weapons, limpet mines^[source]	6 x 21 in (533 mm) torpedo tubes (18x Mark 48 Mod 7 AT torpedoes)^[source]
Country of origin	United States^[source]Inventory Origin column; table 2, row 5, cell 2; revision 1373375989; retrieved 2026-09-30	United Kingdom^[source]
Name	—	Upholder class (UK) Victoria class (Canada)^[source]
Succeeded by	—	Type 212CD^[source]
In commission	—	RN: 2 June 1990 – October 1994 CFMC / RCN : December 2000 – present^[source]
Planned	—	12^[source]
Canceled	—	8^[source]
Active	—	4^[source]

FORCETALLY

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Shallow Water Combat Submersible

Upholder/Victoria-class submarine

Power

—

Diesel-electric – 1 shaft 2 × Paxman Valenta 2,035 hp (1.517 MW) 1600 RPA SZ diesels 1 × GEC electric motor (5 MW)^[source]

Builders

Teledyne Brown Engineering^[source]

VSEL, Ltd and Cammell Laird Co.^[source]

Operators

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

Royal Navy Royal Canadian Navy^[source]

Preceded by

SEAL Delivery Vehicle^[source]

Oberon class^[source]

Cost

$383 million (program cost)^[source]

—

On order

7 USN, 3 RN^[source]

—

Building

2^[source]

—

Completed

2^[source]

4^[source]

Type

Submersible , diver propulsion vehicle^[source]

Diesel-electric submarine (Hunter Killer SSK )^[source]

Propulsion

Lithium-ion batteries powering electric motors^[source]

—

Test depth

>190 feet (58 m)^[source]

Over 656.17 ft (200 m)^[source]

Sensors & processing systems

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

Lockheed Martin CCS 876 combat system Submarine-Launched Expendable Bathythermograph (SSXBT): Lockheed Martin Mk-8 Bathythermograph Periscope : Thales Group CK-35/CH-85 Sonar : Lockheed Martin AN/BQQ-10(v)7 Sonar System Type 2040 active/passive bow multibeam echo sounder with Lockheed Martin Echo Sounder Interface BQG-501 micropuffs Type 2007 flank Ultra Electronics Submarine Towed Array Sonar System (SubTASS) Type 2019 active intercept Fire Control : Lockheed-Martin Librascope SFCS Mk 1 Mod C Radar : Kelvin Hughes KH-1007^[source]

Armament

SEAL team personal weapons, limpet mines^[source]

6 x 21 in (533 mm) torpedo tubes (18x Mark 48 Mod 7 AT torpedoes)^[source]

Country of origin

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

United Kingdom^[source]

Name

—

Upholder class (UK) Victoria class (Canada)^[source]

Succeeded by

—

Type 212CD^[source]

In commission

—

RN: 2 June 1990 – October 1994 CFMC / RCN : December 2000 – present^[source]

Planned

—

12^[source]

Canceled

—

8^[source]

Active

—

4^[source]