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The United States Navy's Atlantic Undersea Test and Evaluation Center (AUTEC) is a laboratory that performs integrated three-dimensional hydrospace/aerospace trajectory measurements covering the entire spectrum of undersea simulated warfare – calibration, classifications, detection, and destruction.
A Soviet tank crosses the Khalkhyn Gol river, August 1939. An underwater bridge is a military structure that was employed during World War II and the Korean War.. Underwater bridges, typically constructed of logs, sand and dirt just beneath the surface of the water in a river or similar narrow body of water, allow heavier vehicles to cross the river driving through only shallow water.
An underwater tunnel is a tunnel which is partly or wholly constructed under the sea or a river. They are often used where building a bridge or operating a ferry link is unviable, or to provide competition or relief for existing bridges or ferry links. [ 1 ]
Bobby Hopper Tunnel, twin tunnels, Interstate 49, Washington County; Cotter Tunnel, rail tunnel under US 62, MNA Railroad, northwest of Cotter, Marion County; Crest Tunnel, rail tunnel under State Highway 14, MNA Railroad, northwest of Omaha, Boone County
Bridge–tunnel Completion Country Location Body/ies of water Notes Hampton Roads Bridge–Tunnel: 1957 United States Norfolk and Hampton, Virginia Hampton Roads: Chesapeake Bay Bridge–Tunnel: 1964 United States Virginia Beach and Northampton County, Virginia Chesapeake Bay: Louis-Hippolyte Lafontaine Bridge–Tunnel: 1967 Canada
The Washburn Tunnel is a two-lane underwater motor-vehicle tunnel connecting Galena Park and Pasadena, two suburbs of Houston, Texas. Completed in 1950, it travels north-south underneath the Houston Ship Channel. It was named after Harris County, Texas Auditor Harry L. Washburn. It is the largest and first toll-free vehicular tunnel in the ...
Special Forces Underwater Operations (SFUWO) is the term for United States Army Special Forces combat operations involving the use of underwater infiltration methods. These typically involve the use of closed circuit dive equipment to infiltrate a beach landing site (BLS) undetected. [ 1 ]
The Ted Williams Tunnel is a highway tunnel in Boston, Massachusetts.The third in the city to travel under Boston Harbor, with the Sumner Tunnel and the Callahan Tunnel, it carries the final segment of Interstate 90 (the Massachusetts Turnpike) from South Boston towards its eastern terminus at Route 1A in East Boston, slightly beyond Logan International Airport.