Puerto Rico Trench Puerto Rico Trench The Puerto Rico Trench is located on the boundary between the Caribbean Sea and the Atlantic Ocean. The oceanic trench is associated with a complex transition between the Lesser Antilles subduction zone to the south and the major transform fault zone or plate boundary, which extends west between Cuba and Hispaniola through the Cayman Trough to the coast of Central America. The trench is long and has a maximum depth of or 5.373 miles at Milwaukee Deep, which is the deepest point in the Atlantic Ocean and the deepest point not in the Pacific Ocean. Scientific studies
SS Milwaukee the Great Lakes" in 1968. As a result of the loss of the SS "Milwaukee", the Grand Trunk needed a new train ferry. The replacement was the , launched November 25, 1930. The replacement vessel is now a museum ship and National Historic Landmark. In April 1972, the wreck was located in Lake Michigan, seven miles northeast of Milwaukee, Wisconsin, three miles offshore (on a line between Milwaukee and Grand Haven), at , in of water. In March 2006, the History Channel television program "Deep Sea Detectives" premiered an episode entitled "Train Wreck in Lake Michigan", which profiled the loss