Updated.
Revealed: Latest Dutch Special Forces Swimmer Delivery Vehicles
Previously unpublished blurry mobile phone photographs of an unusual boat seen on a Dutch lake showed the latest Ortega Mk.1D 4-person Swimmer Delivery Vehicle (SDV). The craft was undergoing manufacturer’s trials prior to delivery to a defense customer. Covert Shores can reveal further details and high-resolution photos.
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Yantar_News
British deep-sea robot seen on Russian GUGI ship passing UK
When the Russian ‘spy ship’ Yantar passed British waters this week she was shadowed by Royal Navy destroyer HMS Diamond (D-34). The escort made headlines with images posted on major media and social media. Yantar is a controversial ship. One interesting detail is that the British supplied Anglo-Swedish Tiger remote operated vehicle (ROV) was lashed to the helipad. Read More >....
Ru_Hydro-Bionics
Soviet Hydro-Bionics
Bio-mimic submarine technology, when underwater vehicles use propulsion mechanisms inspired by marine wildlife instead of the propellers (‘screws’) is a hot topic. But it is not as new as you might think... Read More >....
Triton-2_SDV_Baltic
Photo of Russian Defense Exhibition
The photo can be geo-located to the main piers on the island of Kronshtadt in St. Petersberg... Read More >....
Cn_Underwater_Great_Wall
Good Wind ears: China’s Underwater Great Wall 
A recent video adds to the information we have of China's ambitious submarine monitoring system in the South China Sea... Read More >....
Russian_Submarine_Activity
Sanity checking reports of increased Russian submarine activity There have been reports that Russian submarine activity has returned to Cold War levels. This article uses publicly available data to compare recent activity to Cold War levels.... 
O_Eneroth_Submarine_1897
Vintage submarine design from 1897
In the late 1800s Sweden was q leading powerhouse in submarine design, with a Nordenfelt Class submarine being the first in the world to launch a torpedo in 1888. Ten years later another Swedish engineer, O Eneroth, was proposing a cutting-edge submarine design.
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Photo from Sjöhistoriska museet.
3GST9
An advanced Dry Combat Submersible design from the end of the Cold War, the 3GST9 has a reputation of being a very impressive boat, continuing the Italian tendency to be ten years ahead of everyone else in this field. Its Air Independet Power (AIP) made it a generation ahead of contemporary designs. Read More >....
Alfa_Class_Submarine
Russian ALFA Class interceptor submarine At the height of the Cold War NATO submariners found themselves confronting a Soviet submarine which not only greatly out-performed their own boats, but which could operate beyond the reach of their weapons... Read More >....
Burning_Narco-VSV
Fifth Narco VSV
The fifth Narco-VSV (Very Slender Vessel) has been intercepted by the US Navy. The Cyclone Class patrol boat USS Zephyr (PC 8), with a US Coast Guard detachment aboard, seized the vessel in the Eastern Pacific on 7th April 2018....