Naval Systems

Manned Combat Submersible

The Lockheed Martin Manned Combat Submersible is the product-page name for the Dry Combat Submersible (DCS), a pressurized special-operations insertion vehicle also designated S351 Nemesis. It carries two crew and up to six swimmers, uses electric propulsion, and reached USSOCOM initial operational capability in 2023 after a 2016 contract award.

Profile

Origin
United States
Built by
Lockheed Martin
Type
Dry combat submersible
Service note
2016-present
Designer
Lockheed Martin
Designed
2016
Produced
2016-2023
Number built
2 delivered
Variants
Dry Combat Submersible (DCS), S351 Nemesis

Also Known As

  • Dry Combat Submersible
  • DCS
  • S351 Nemesis
  • UOES2

Specifications

Crew
2 crew plus up to 6 swimmers
Length
12 m (39 ft)
Beam
2.4 m (7.9 ft)
Displacement
28 tonnes
Speed
5 knots
Range
60 nautical miles
Endurance
24 hours
Test depth
100 m
Propulsion
Electric motors with lithium-ion batteries

Service And Conflict Use

Service History

In service
U.S. Special Operations Command declared initial operational capability for the DCS in June 2023.
Used by
U.S. Special Operations Command, United States Navy SEALs

Conflict Usage

Side
🏳️Unspecified

Exact model: Lockheed Martin Manned Combat Submersible / Dry Combat Submersible S351 Nemesis. It is for special-operations swimmer delivery; I found no confirmed public combat use.

Timeline

Manned Combat Submersible Key Events

  1. Dry Combat Submersible contract awarded

    The U.S. Department of War announced a $166 million contract for Lockheed Martin Mission Systems and Training to design, develop, construct, test, produce, and sustain the dry combat submersible system for USSOCOM.

    Sources: Contracts For Jul. 13, 2016

  2. IOC declared for the DCS

    Lockheed Martin said USSOCOM had declared initial operational capability for the Dry Combat Submersible and described the vehicle as a dry environment for special operators with lock-in and lock-out capability.

    Sources: USSOCOM Declares Initial Operational Capability for Lockheed Martin's New Dry Combat Submersible

Manned Combat Submersible Images

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Sources