North Atlantic Deep Water be detected by its high salinity, high oxygen content, nutrient minima, high C/C, and chlorofluorocarbons (CFCs). CFCs are anthropogenic substances that enter the surface of the ocean from gas exchange with the atmosphere. This distinct composition allows its path to be traced as it mixes with Circumpolar Deep Water (CDW), which in turn fills the deep Indian Ocean and part of the South Pacific. NADW and its formation is essential to the Atlantic Meridional Overturning Circulation (AMOC), which is responsible for transporting large amounts of water, heat, salt, carbon, nutrients and other substances from the Tropical Atlantic to the Mid
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