In what ocean did the USS Cyclops disappear?
USS Cyclops (AC-4) USS "Cyclops" (AC-4) was one of four "Proteus"-class colliers built for the United States Navy several years before World War I. Named for the Cyclops, a primordial race of giants from Greek mythology, she was the second U.S. Naval vessel to bear the name. The loss of the ship and 306 crew and passengers without a trace within the area known as the Bermuda Triangle some time after 4 March 1918 remains the single largest loss of life in U.S. Naval history not directly involving combat. As it was wartime, there was speculation she was captured or sunk by a German raider or submarine, because she was carrying 10800 LT of manganese ore used to produce munitions, but German authorities at the time, and subsequently, denied any knowledge of the vessel. The Naval History & Heritage Command has stated she "probably sank in an unexpected storm" But the ultimate cause of the ship's fate is unknown.
Abyssal zone The abyssal zone or abyssopelagic is a layer of the pelagic zone of the ocean. "Abyss" derives from the Greek word ἄβυσσος , meaning bottomless. At depths of 4,000 to 6,000 metres (13,123 to 19,685 feet), this zone remains in perpetual darkness and never receives daylight. These regions are also characterised by continuous cold and lack of nutrients.The abyssal zone has temperatures around 2 °C to 3 °C (35 °F to 37 °F) through the large majority of its mass. It is the deeper part of the "midnight zone" which starts in the bathypelagic waters above. Its permanent inhabitants (for example, "Riftia pachyptila", (the giant tube worm)) found near hydrothermal vents in the Pacific Ocean and the giant squid are able to withstand the immense pressures of the ocean depths, up to 76 MPa .