Ocean Floor Exploration

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Presentation transcript:

Ocean Floor Exploration

HMS Challenger (1872-1876) The old method of data collection to map the ocean floor used lead weights and rope.

SONAR (Echo-Ranging) SOund Navigation And Ranging Began use in 1925 Helped submarines in WWII

Satellites In the 1970s, orbiting satellites began to collect ocean data This method proved to be much faster

Satellite Coverage in 10 Days

Seasat launched in 1978 measures direction & speed of ocean currents

Geosat (used to map sea floor)

Underwater Submersibles Ex. of piloted vessels: The Alvin and Deep Flight Ex. of robotic vessels: JASON II and Medea (both are tethered together)

Jason II (ocean floor) Medea (ocean surface)

The Alvin

Deep Flight Submersible **Actually classified as an underwater airplane.

Ocean Floor Features

Ocean Floor Features

Active Continental Margin

Passive Continental Margin