During the Cold War US Navy submarines conducted numerous spying missions off the Soviet coast. Few were as audacious as Operation IVY BELLS where underwater wire taps were placed on Soviet military communication cables deep within Russia's own back yard. Several specially modified US Navy nuclear submarines were employed, including the USS Seawolf. Read More >....
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US Navy SEALs next generation SDV Mk.XI (SWCS)
Shallow Water Combat Submersible (SWCS) - US Navy's and USSOCOM's next generation SEAL Delivery Vehicle. Read More >....
Book Review - Operation Ivy Bells
Historical 'fiction' allows the author, former US Master Diver Robert G. Williscroft, to share the story of the most famous spy submarine mission of the Cold War. Read More >....
SDV news round-up
Latest Swimmer Delivery Vehicle (SDV) news from around the world.... Read more ->.....
The World War Two SDV called Sleeping Beauty
The Motorised Submersible Canoe (MSC), popularly known by its codename the Sleeping Beauty, was among the world's first Special Forces submersibles. During WW2 several hundred were built (under great secrecy) and were operated by British, Australian and US forces. >.....
Book Review - Project Quick Find
Project Quick Find is former US Navy SEAL Michael Wood's first-hand account of the US Navy's marine mammal program in the early to mid 1970s. >....
Book Review - Project Azorian
One of the very few authoritative books on the CIA led raising of the Soviet submarine K-129 which sank mysteriously at the height of the Cold War READ MORE
X-post - SDVs ops in Desert Storm
This interesting article appeared on a USN SEALs related blog that I follow. Retired SEAL Michael Wood gives a first-hand account of a close encounter during SDV ops as part of Operation Desert Storm.
FULL ARTICLE (link opens in new tab)
Dangers of the deep - submarine rescue
One night in October 1983 the almost brand-new Sava class boat Drava ran into serious difficulties in the Adriatic. Unseen by the crew a pin-prick sized hole has developed and the submarine started taking on water. As the water gained, the boat started to slowly sink. 
Dolphin SDV-X
The Dolphin Class advanced Swimmer Delivery Vehicle (SDV-X) was developed in the 2000s as a US export type based on the SDV Mk.VIII Mod-1 Gator Class SDV in service with the USN SEALs. 