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SubmarinesOn order: 7 USN, 3 RN
Submersible , diver propulsion vehicle
Shallow Water Combat Submersible is a submersible , diver propulsion vehicle. It was built by Teledyne Brown Engineering. Reported operators include United States Navy Royal Navy (planned).
United StatesShallow Water Combat Submersible
CAPT Kate Dollof · Public domain · Resized · Public domain · Source ↗ · ModifiedTeledyne Brown Engineering
United States Navy Royal Navy (planned)
SEAL Delivery Vehicle
$383 million (program cost)
7 USN, 3 RN
2
2
Submersible , diver propulsion vehicle
4.5 tonnes (5.0 short tons)
6.8 meters (22 ft)
1.5 meters (4.9 ft)
1.5 meters (4.9 ft)
Lithium-ion batteries powering electric motors
6 kn (11 km/h)
12 hours
>190 feet (58 m)
6 (2 crew, 4 passengers)
Inertial navigation system , high-frequency sonar for obstacle/mine avoidance and navigation, GPS
SEAL team personal weapons, limpet mines
MK 11 Shallow Water Combat Submersibles United States Submersible 3 4.5 tonnes (4.4 long tons; 5.0 short tons) Manned submersible used primarily for covert or clandestine missions by the Special Boat Service (SBS). The system fits inside the CHALFONT dry deck shelter on the Astute-class submarines .
Reference text from Wikipedia contributors, used under CC BY-SA 4.0.
True scale
Sourced dimensions beside a 1.75 m human reference.
Points represent sourced observations, including revisions. Revisions on the same effective date are not separate inventory events. Ranges appear in the table and are not plotted as exact points.
| Observation / report period | Value | Source | Claim state |
|---|---|---|---|
| 1 Oct 2026 | 6.8 m | Wikipedia contributors | superseded |
| 1 Oct 2026 | 6.8 m | Wikipedia contributors | approved |
Shallow Water Combat Submersible equipment records. Variants, orders and quantities are shown as reported in each inventory source; coverage is incomplete.
United KingdomReported count for MK 11 Shallow Water Combat Submersibles. Country-wide list; no individual service specified. 1 distinct count cell(s) from the same source list; shared rowspan cells counted once. Retired, wholly reserve and on-order rows are excluded; the reported count retains any explicitly mixed stock scope in the quoted row. Count column(s): number: 3. Origin: United States. The listed variants/roles are the scope, not an immediately deployable count. The components do not establish one inventory census date; the stored date is the retrieved source snapshot.