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6.4 Study of the Seas

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Across
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The crew compartment
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Self-contained underwater breathing apparatus
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Is a device with an open tube that is dropped to the sea floor
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Modern manned submersibles
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Floating observation stations
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Modern variants of the drift bottle
Down
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One thermometer type is called
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Is a highly maneuverable robot
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Plastic tubes on a weighted line that is lowered into the ocean
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Most important tool of the oceanographer is the
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Is plunged into the sediment and is capable of extraction cores up to 27m long
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Small research submarines
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A breakthrough in submersible design was the invention of the
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Capable of operation without any outside guidance or help
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Is the primary method of determining the physical properties of water