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As you can see from the identical latitude and
longitude demarcations, this map shows the same area as slide 3. The
difference is, this one's useful because it is more detailed! It was
created using SeaBeam technology. SeaBeam is a form of sonar: many transducers
send a signal from the ship as it's in motion to the seafloor. These
bounce back, and the time it takes can be translated into depth of the
ocean.
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