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The bathythermograph, or BT, also known as the Mechanical Bathythermograph, or MBT; [1] is a device that holds a temperature sensor and a transducer to detect changes in water temperature versus depth down to a depth of approximately 285 meters (935 feet).
She headed the Bathythermograph Unit beginning in February 1957, analyzing ocean temperature changes at various depths, over time and space, using computers to manage the large data sets involved. [ 9 ] [ 10 ] [ 11 ] Her work had applications in tracking submarines, tuna migration, and hurricanes, among other fields. [ 8 ]
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Repeat XBT (Expendable bathythermograph) line network (41 lines) Temperature JCOMM Ship Observations Team (SOT) Global tropical moored buoy network (~120 moorings) Temperature, salinity, current, other feasible autonomously observable ECVs JCOMM DBCP Tropical Moored Buoy Implementation Panel (TIP) Reference mooring network (29 moorings)
The earliest idea for a bathometer is due to Leon Battista Alberti (1404–1472) who sunk a hollow sphere attached to some ballast with a hook. When the ball reached the bottom it detached from the ballast and resurfaced.
The bathythermograph was developed by Carl-Gustav Rossby and turned into a production model for Navy use by Athelstan Spilhaus working with Maurice Ewing and Allyn C. Vine. [28] The work with sound led to Ewing's discovery of the sound channel, a layer of minimum velocity, allowing detection of sound at very long ranges. [29]