(X-Post from Naval Analyses) 
CosMoS CE2F were a series of Swimmer Delivery Vehicle (SDV) built by M/s Cos.Mo.S Spa. which was in Livorno of Italy. Cosmos is probably the most famous military wet-sub (chariot) / midget sub manufacturer in the world. ... The Hellenic Navy (Πολεμικό Ναυτικό) purchased some SDVs of the CE2F/X60 model (perhaps four) in the late '70s. In service, they were known as ΥΠ.ΟΧ. (Υποβρύχια Οχήματα). The CE2Fs are designed from the outset as a mean for attacking enemy warships in harbor as well as for other special operations..... Read more at Naval Analyses
All articles
SeaShadow DPV
The SeaShadow Diver Propulsion Vehicle (DPV) was developed specifically to meet US Navy EOD (Explosive Ordinance Disposal) requirements.... Read More >....
USMC SDV history
Within the US Armed Forces, it is not just the US Navy SEALs who have a history of operating Swimmer Delivery Vehicles (SDVs). The US Marine Corps’ brief foray into operating the SDV Mk.7 ended in spectacular fashion on a golf course in Little Creek... Read More >....
ASDV-800
It’s not just USSOCOM who are revisiting the concept of Dry Combat Submersibles. Vogo Engineering designed the eight-man ASDV 800 (Advanced SDV)..... Read More >....
Rotinor DPV in Jason Statham movie
The trailer Jason Statham’s new movie, The Mechanic: Resurrection came out a couple of days ago. Sandwiched between the predicable fast action, fast women, grumpy looks and explosions was a brief glimpse of an underwater scene. Statham’s character (I thought he always played himself??) is seen on a sleek black underwater chariot. More specifically, a SeaBob diver propulsion vehicle (DPV) which is the civilian version of the Rotinor Divejet.... Read More >....
SharkMarine
In spite of navigation being probably the single greatest challenges to underwater operations, development has tended to emphasize the vehicle before the sensors. Traditionally for divers, sensor and navigation systems were subsystems of an SDV (Swimmer Delivery Vehicle), or merely optional add-ons. Many smaller DPVs (Diver Propulsion Devices, hand-held SDVs) has virtually no instrumentation making long range missions underwater unviable. Not only is this changing, but the relationship between navigation systems and SDV is reversing; increasingly SDVs can be seen as an add-on to a navigation system. Nowhere is this more apparent than with Canadian manufacturer SharkMarine.... Read More >....
USS Halibut Cutaway
.... Read More >....
Work starts on XSV-17 Special Forces interceptor
Safehaven Marine (Website) have begun the manufacture of the new XSV 17m wave piercer design. The 60kts boat is a larger (17m / 56ft) version of their Barracuda series.... Read More >....
New video of WP-18 stealth Special Forces boat
A new video has been uploaded showing the world’s fastest naval vessel, the 70kt+ WP-18 Special Forces interceptor at speed. Gorgeous. 
Ortega Mk1A SDV testing
Dutch Swimmer Delivery Vehicle and Special Forces Diver technology company Ortega (website) have released a new video of their Mk.1A SDV being tested in Croatia. 