deep water echo sounder

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• Deep-sea exploration — is the investigation of physical, chemical, and biological conditions on the sea bed, for scientific or commercial purposes. Deep sea exploration is considered as a relatively recent human activity compared to the other areas of geophysical… …   Wikipedia

• Challenger Deep — Location of Challenger Deep within the Western Pacific Ocean The Challenger Deep is the deepest known point in the oceans, with a depth of 10,902 metres (35,768 ft) to 10,916 metres (35,814 ft) by direct measurement from submersibles, and… …   Wikipedia

• Sonar — This article is about underwater sound propagation. For atmospheric sounding, see SODAR. For other uses, see Sonar (disambiguation) …   Wikipedia

• Submarine — For other uses, see Submarine (disambiguation). A Japan Maritime Self Defense Force Oyashio class submarine in 2006 A submarine is a watercraft capable of independent operation below the surface of the water. It differs from a submersible, which… …   Wikipedia

• Geophysical MASINT — is a branch of Measurement and Signature Intelligence (MASINT) that involves phenomena transmitted through the earth (ground, water, atmosphere) and manmade structures including emitted or reflected sounds, pressure waves, vibrations, and… …   Wikipedia

• History of research ships — The research ship had origins in the early voyages of exploration. By the time of James Cook s Endeavour , the essentials of what today we would call a research ship are clearly apparent. In 1766, the Royal Society hired Cook to travel to the… …   Wikipedia

• undersea 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… …   Universalium

• Underwater acoustics — The field of underwater acoustics is closely related to a number of other fields of acoustic study, including sonar, transduction, acoustic signal processing, acoustical oceanography, bioacoustics, and physical acoustics.HistoryUnderwater sound… …   Wikipedia

• Mariana Trench — This article is about the ocean trench. For the Canadian band, see Marianas Trench (band). Coordinates: 11°21′N 142°12′E / 11.35°N 142.2°E / 11.35; 14 …   Wikipedia

• Oceanography — For the scientific journal, see Oceanography (journal). Thermohaline circulation Oceanography (compound of the Greek words ωκεανός meaning ocean and γράφω meaning to write ), also called oceanology or marine science, is the branch of Earth… …   Wikipedia

• Fishfinder — A fishfinder is a type of fathometer, both being specialized types of echo sounding systems, a type of Active SONAR. ( Sounding is the measurement of water depth, a historical nautical term of very long usage.) The fishfinder uses active sonar to …   Wikipedia