Deep Sea Exploration Documentary - Into The Sea Abyss - Documentary Films
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 research, as the depths of the sea have been investigated only during comparatively recent years. The ocean depths still remain as a largely unexplored part of the planet, and form a relatively undiscovered domain.
In general, modern scientific Deep-sea exploration can be said to have begun when French scientist Pierre Simon de Laplace investigated the average depth of the Atlantic ocean by observing tidal motions registered on Brazilian and African coasts. He calculated the depth to be 3,962 m (13,000 ft), a value later proven quite accurate by soundings measurement. Later on, with increasing demand for submarine cables installment, accurate soundings was required and the first investigations of the sea bottom were undertaken. First deep-sea life forms were discovered in 1864 when Norwegian researchers obtained a sample of a stalked crinoid at a depth of 3,109 m (10,200 ft). The British Government sent out the Challenger expedition (a ship called the HMS Challenger) in 1872 which discovered 715 new genera and 4,417 new species of marine organisms over the space of 4 years.
The first instrument used for deep-sea investigation was the sounding weight, used by British explorer Sir James Clark Ross. With this instrument, he reached a depth of 3,700 m (12,140 ft) in 1840. The Challenger expedition used similar instruments called Baillie sounding machines to extract samples from the sea bed.
Teleoperated Robotics is one of the safest way to explore deep waters: a remotely operated robot vehicle (ROV) becomes the divers eyes and hands in deep marine environments. Decompression sickness ('the bends') can occur if a diver surfaces too quickly from extreme depths; nitrogen in the blood will come out of solution during rapid ascent, and can cause serious injury or death. Using teleoperated robotics or Atmospheric Diving Suits (ADS), which are human shaped (anthropomorphic) submarine exoskeletons, provide a relatively safe method of exploration, with the disadvantage that the lack of fine motor control limits how much of the environment can be closely examined. Bhargav Gajjar of Vishwa Robotics and Massachusetts Institute of Technology, with funding from the Office of Naval Research of the US Navy, is conducting research into deep-sea manipulators in an effort to create a more sensitive system for deep-sea work. This technological breakthrough is a major milestone in human exploration of the last frontier.
In 1960, Jacques Piccard and US Navy Lieutenant Donald Walsh descended in the bathyscaphe Trieste into the Mariana Trench, the deepest part of the world's oceans, to make the deepest dive in history: 10,915 meters (35,810 ft). On 25 March 2012, filmmaker James Cameron descended into the Mariana Trench and, for the first time, is expected to have filmed and sampled the bottom.
Read More: https://en.wikipedia.org/wiki/Deep-sea_exploration
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