Italian 'Deep Shadow' Swimmer Delivery Vehicle revealed

CABI Cattaneo of Milan, Italy, are one of the world’s foremost producers of underwater vehicles and heavy equipment for special forces. But they are virtually unknown outside the close-knit Submarine & Special Forces communities. Until a couple of years ago the secretive nature of their primary customer has meant that their products are for the most part completely unreported. That changed at the Seafuture 2016 show in La Spezia when the company started to court export customers with their Deep Guardian Special Forces Hangar. Now at Seafuture 2018 they have revealed a number of other products including the Deep Shadow SDV.

Photo credit Mariasole BIANCO

Photo credit Mariasole BIANCO


The Deep Shadow carries six combat swimmers and is roughly analogous to the US Navy SEALs’ SDV Mk.VIII series. Payload bays are situated fore and aft and four thrusters allow hovering and exact maneuvering. Its streamlined hull allows a comparatively high yet undisclosed cruising speed.

Italy essentially invented the modern art of underwater sabotage using combat swimmers, using it to great effect in World War One. And more famously during World War Two, when Italian frogmen riding the SLC ‘Maiale’ (’pig’) sunk a number of Allied vessels including the battleships HMS Queen Elizabeth and HMS Valiant. The capability was reestablished soon after the War but has been kept very secret since. CABI Cattaneo going public with their export designs is thus a rare window into this world.

Although this is an export design it is a strong indicator of Italian Special Forces SDV capabilities. COMSUBIN (aka Incursori) are known to operate SDVs, submersible boats (also produced by CABI Cattaneo) and Rotinor Black Shadow diver propulsion vehicles in addition to RHIBs and other craft.