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President Thomas Jefferson signs a bill authorizing the United States Coast Survey.
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Charles Darwin publishes a paper suggesting that coral atolls are the final stage in the subsidence and erosion of volcanic islands.
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James Alden discovers the first known submarine valley, California's Monterey Canyon.
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Charles Wyville Thomson, dredging from the H.M.S Lightning, finds sea life at 4,389 meters
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Naturalist Louis Agassiz steams from the U.S. East Coast to its West Coast around South America, collecting some 30,000 marine specimens.
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H.M.S. Challenger circles the globe conducting research for the Royal Society of London, laying the groundwork for modern oceanography.
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The U.S. Fisheries Commission steamer Albatross begins operations as the first ship built to serve as an oceanographic research vessel.
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Alexander Agassiz makes long research voyages to the South Pacific, collecting data and specimens from remote ocean regions.
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he Titanic sinks after hitting an iceberg, killing 1,500 people. The tragedy led to efforts to develop an acoustic device to find objects ahead of a vessel.
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Reginald Fessenden uses an oscillator to bounce a signal simultaneously off an iceberg and the seafloor, the first acoustic exploration of the seas.