Conning Towers-Nautilus Park in Groton in Southeastern Region, Connecticut — The American Northeast (New England)
Swimmer Delivery Vehicle (SDV)
Photographed by Michael Herrick, September 14, 2022
1. Swimmer Delivery Vehicle (SDV) Marker
Vehicle (SDV)
Submarines have operated with special
operations teams since the days of WWII
with Underwater Demolition Teams (UDT),
commonly known as "SEALs" (Sea-Air-
Land) are used in a variety of clandestine
operations. Carried in a special watertight
tank "piggybacked" to a submarine, the
*SDV gives the SEAL team a greater
range of stealth, mobility and
endurance.
Topics. This historical marker is listed in these topic lists: Military • Waterways & Vessels.
Location. 41° 23.257′ N, 72° 5.231′ W. Marker is in Groton in Southeastern Region, Connecticut. It is in Conning Towers-Nautilus Park. It can be reached from Crystal Lake Road west of Connecticut Route 12 when traveling west. Located at the Submarine Force Library & Museum at the Naval Submarine Base New London. Touch for map. Marker is at or near this postal address: 1 Crystal Lake Road, Groton CT 06340, United States of America. Touch for directions.
Regionally, this marker is on the Connecticut Shoreline, in Greater New London, in Mystic and the Eastern Shore, and in the Thames River Valley. It is also in the American Northeast and in New England. Globally, it is in the North Atlantic Region, North America, the Western Hemisphere, the Western World, and the Anglosphere. Historically, it finds itself in what was once New London County and also one of the original Thirteen Colonies.
Other nearby markers. At least 8 other markers are within walking distance of this marker: Missions NR-1 (here, next to this marker); Submarine NR-1 (a few steps from this marker); USS X-1 (SSX-1) (a few steps from this marker); Japanese Type A (a few steps from this marker); UGM-84 Harpoon
this page online
Also see . . .
1. SEAL Delivery Vehicle (Wikipedia). (Submitted on September 23, 2022, by Michael Herrick of Southbury, Connecticut.)
2. US Navy: Submarine Force Museum. (Submitted on September 23, 2022, by Michael Herrick of Southbury, Connecticut.)
3. Submarine Force Library and Museum (Wikipedia). (Submitted on September 23, 2022, by Michael Herrick of Southbury, Connecticut.)
Photographed by Michael Herrick, September 14, 2022
2. Swimmer Delivery Vehicle (SDV) and Marker
Credits. This page was last revised on May 19, 2026. It was originally submitted on September 23, 2022, by Michael Herrick of Southbury, Connecticut. This page has been viewed 333 times since then and 27 times this year. Photos: 1, 2. submitted on September 23, 2022, by Michael Herrick of Southbury, Connecticut.
