Credit
CAPT Kate Dollof · Public domain · Resized · Public domain · Source ↗ · Modified
FORCETALLY
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At a glance
Shallow Water Combat Submersiblelarger figure on 0 of 3
Taigei-class submarinelarger figure on 3 of 3
Measured figures
Length
Single source6.8 meters (22 ft)[source]
Length
Single sourceConfiguration
| Specification | Shallow Water Combat Submersible | Taigei-class submarine |
|---|---|---|
| Builders | Teledyne Brown Engineering[source] | Mitsubishi Heavy Industries Kawasaki Heavy Industries[source] |
| Operators | United States Navy Royal Navy (planned)[source] | Japan Maritime Self-Defense Force[source] |
| Preceded by | SEAL Delivery Vehicle[source] | Sōryū class[source] |
| Cost | $383 million (program cost)[source] |
Counts only measures both sources give with the same scope. A larger figure is not a better system.
84.0 m (91.9 yd)[source]
Bars compare reported quantities only. A larger figure does not make a system better; configurations and test conditions differ.
¥ 69.7 billion (Approx. US$ 635 million)[source] |
| On order | 7 USN, 3 RN[source] | — |
|---|
| Building |
|---|
| Completed | — |
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| Type | Submersible , diver propulsion vehicle[source] | Attack submarine[source] |
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| Propulsion | Lithium-ion batteries powering electric motors[source] | Diesel-electric : 2 first ships: 2 × Kawasaki 25/25SB Following ships: 2 × Kawasaki 12V 25/31 Batteries : lithium-ion Propulsion: : 1 × electric motor 1 × shaft 1 × propeller[source] |
|---|
| Test depth | >190 feet (58 m)[source] | — |
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| Sensors & processing systems | Inertial navigation system , high-frequency sonar for obstacle/mine avoidance and navigation, GPS[source] | Systems : OYX-1 processing system ZQX-12 tactical display system Sonar suite Oki ZQQ-8 (Mitsubishi Electric) that includes: Bow-mounted sonar Flank-array sonar Fibre-optic towed-array sonar : Periscopes : Non-penetrating optical periscope (Mitsubishi Electric) ESM: NZLR-2 Surface radar ZPS-6H[source] |
|---|
| Armament | SEAL team personal weapons, limpet mines[source] | Torpedoes : 6 × HU-606 533 mm (21.0 in) torpedo tubes with: Type 89 heavyweight torpedo Type 18 heavyweight torpedo Missiles : UGM-84L Harpoon Block II Future weapon : Type 12 anti-ship missiles Potential weapon : HGVP[source] |
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| Country of origin | United States[source]Inventory Origin column; table 2, row 5, cell 2; revision 1373375989; retrieved 2026-09-30 | Japan[source] |
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| Name | — | Taigei class[source] |
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| Built | — | 2018-present[source] |
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| In commission | — | 2022-present[source] |
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| Planned | — | 10[source] |
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| Active | — |
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