submarine acoustics
51Pelagic zone — Aquatic layers Pelagic    Photic       Epipelagic …
52Littoral zone — Littoral redirects here. For other uses, see Littoral (disambiguation). Marine habitats Different disciplines and agencies divide the littoral zone into different subregions, according to how they want to view the zone. This diagram show …
53Volcanic arc — Mariana Islands, an oceanic island arc A volcanic arc is a chain of volcanoes positioned in an arc shape as seen from above. Offshore volcanoes form islands, resulting in a volcanic island arc. Generally they result from the subduction of an… …
54Mid-ocean ridge — Oceanic ridge, including a black smoker A mid ocean ridge is a general term for an underwater mountain system that consists of various mountain ranges (chains), typically having a valley known as a rift running along its spine, formed by plate… …
55Ocean exploration — is a term of biography describing the exploration of the ocean. It is also the period when people explored the ocean fishies. Notable explorers include: the Greeks, the Egyptians, the Polynesians, the Phoenicians, Phytheas, Herodotus, the Vikings …
56Deep sea — zones For the IMAX film, see Deep Sea 3D. The deep sea, or deep layer[1], is the lowest layer in the ocean, existing below the thermocline and above the seabed, at a depth of 1000 fathoms …
57Continental margin —   Sediment   …
58undersea exploration — Introduction the investigation and description of the ocean waters and the seafloor and of the Earth beneath. Primary objectives and accomplishments Included in the scope of undersea exploration are the physical and chemical… …
59Wind wave — Ocean wave redirects here. For the film, see Ocean Waves (film). North Pacific storm waves as seen from the NOAA M/V Noble Star, Winter 1989 …
60Jacques Piccard — Infobox Scientist name = PAGENAME box width = image width =150px caption =Don Walsh and Jacques Piccard birth date = Birth date and age|1922|7|22 birth place = Brussels, Belgium death date = death place = residence = citizenship = nationality =… …
