BEAM: .......................... 10 feet
POWER PLANT: ...........electric drive; 3,000 shp plant coupled with
electric motor controller, expandable to 6,000
shp with additional motor controlled modules
BUILDERS:...................Northrop Grumman Shipbuilding, General
Dynamics Electric Boat
DRY COMBAT SUBMERSIBLE (DCS)
BRIEFING: Planning began in 2010 for a Joint Multimission
Submersible (JMMS) to meet requirements of the special opera-
tions forces after the Advanced Seal Delivery System (ASDS)
was canceled. The single ASDS sustained a severe battery fire in
November 2008. In July 2009, SOCOM announced that repair-
ing the craft was not economically feasible. In August 2010,
SOCOM canceled the JMMS program because of affordability
In October 2010, SOCOM announced a continued need for
a dry diver lockout submersible for special operations. The DCS
would be able to operate from submarines and surface ships.
SOCOM has solicited industry solutions and issued a Request
for Proposal in October 2015.
CONTRACTORS:...Lockheed Martin (includ-
ing Submergence Group,
Northrop Grumman and
Newport News Ship-
Giunio Santi Engineering
BRIEFING: The Mk 8 Mod 1 SDV is a
manned wet-submersible vehicle used
to deliver Navy SEALs and their equipment to mission areas. The crew operates and navigates the submerged SDV
while using underwater breathing apparatus for life support.
The SDV, developed by the Naval
Surface Warfare Center, Panama City,
Fla., is battery-powered and equipped
with propulsion, navigation, communication and life-support equipment. It is
capable of delivering several fully
equipped SEALs to a mission area, loitering, retrieving the SEALs and returning while remaining submerged.
The Mk 8 Mod 1 SDV, delivered to
Naval Special Warfare forces in 1996, has
increased range, speed, capacity and
maintainability over previously operational SDVs.
A fleet modernization for all SDVs
was completed in September 2006,
including increased diver air capacity,
improved diver communications, satellite communications capability, reduction of signal acquisition time for the
Global Positioning System and installation of a Windows-based computer.
The SDV eventually will be replaced
by the Shallow-Water Combat Submersible, a 10,000-pound vehicle that
will carry six or more SEALs.
DISPLACEMENT: ... 3 tons (dry)
LENGTH: ............... 15. 4 feet
BEAM:.................... 6. 2 feet
COMPLEMENT:...... 2 crew plus SEALs