Updated: originally posted 26th June 2018
Many thans to unnamed others, without whom this article would not have been possible.
'Diver Delivery Craft' Special Forces underwater vehicle revealed
British firm Defense Submersibles International (DSI) has joined Dutch new entrants Ortega Submersibles in the emerging category of ‘submersible canoe’ style Swimmer Delivery Vehicles. These mid-sized SDVs are much larger and more enclosed than Diver Propulsion Vehicles (DPVs) but still smaller and more open than regular SDVs. Another defining characteristic is that they are optimized for surface running for long distances like submersible boats, thus greatly increasing their range and endurance over a purely submerged craft of the same size. The prototype craft is expected to be tested this year.
The DSI Diver Delivery Craft was showcased at UDT-2018 in Glasgow, Scotland. Previously the vehicle has not been revealed to the public.
The design appears to be three-person, sitting in-line with open cockpits. Large wing-like hydroplanes are positioned fore and aft, with an almost bat-like shape. There are vertical thrusters mounted in the forward hydroplane fairing, and electric thrusters and vertical rudders below the aft set. The design is propelled on the surface via a single waterjet with thrust reverser. This arrangement suggests a diesel engine for surface mode. No snorkel is visible however.
The ultimate book of Special Forces subs Covert Shores 2nd Edition is the ONLY world history of naval Special Forces, their missions and their specialist vehicles. SEALs, SBS, COMSUBIN, Sh-13, Spetsnaz, Kampfschwimmers, Commando Hubert, 4RR and many more.
Check it out on Amazon
Length: 7.5 meters
Beam: 2.4 meters
Height: 1.4 meters
Weight (dry, including occupants): 1,800 kg
Speed: 35 knots surface mode, 3.5 knots submerged.
Range: 100 nm surface, 10 nm submerged
Operating depth: tbc
Passengers: 3 including pilot
Propulsion: 135 hp 4-cylinder gasoline (petrol) engine driving a pumpjet for surface mode, two eletric thrusters for submerged mode, plus four vertical thrusters for depth and trim.
Related articles (Full index of popular Covert Shores articles)
Ortega Mk.1 Swimmer Delivery Vehicle
Sleeping Beauty (Motorised Submersible Canoe) of WW2
Lockheed S301i, S351 and S302 Dry Combat Submersibles
SDV Mk.9 SEAL Delivery Vehicle. w/Cutaway
SWSC (Shallow Water Combat Submersible) US Navy SEALs next gen' SDV
Cos.Mo.S Nessie Fast SDV submersible boat
Wholphin X2, Dolphin X1 and Piranha SDV-X
Cos.Mo.S CE4F 4-man SDV
Sphyrene and Coryphene SDVs
Narwal / Orca Dry Combat Submersible (UWTG)
Nerpa anti-diver UUV
USN Navy SEAL's UOES3 (Button 5.60) Dry Combat Submersible (DCS)
Proteus advanced SDV
Cos.Mo.S CE2F chariot
SWUV (/ PSM3G) advanced SDV
Naval Spetsnaz in Hybrid Warfare (Russian SDVs and DPVs)
SubSEAL advanced SDV