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Charles Thomson found sea life at 4389m-navigation
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Louis Agassiz collects 30,000 marine specimen-trade/scientific research
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Albatross becomes the first oceanographic research vessel-scientific research
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Titanic sinks and a device is created to find objects ahead of a vessel-scientific research
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William Beebe and Otis Barton pioneered manned exploration of the ocean-navigation
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Jacques Cousteau and Emile Gagnan engineer the Aqua-Lung, changing how humans interact with the sea-navigation/scientific research
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Trieste reaches the deepest point in the Mariana trench-navigation
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The Scripps Institution of technology develops the Deep Tow System, helping discover unmanned oceanographic systems-navigation
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Hydrothermal vents are discovered-recreation
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TOPEX/Poseidon satellite starts to map out the surface of the sea-navigation/recreation