Exploring the Ocean with Robots and Submarines

To explore the deep ocean, scientists rely on numerous pieces of high-tech equipment. This photo gallery showcases some of the remotely operated vehicles (ROVs), submersibles, and other devices that have been used. Read about the Scarlet Knight, the first underwater robotic vehicle to cross an ocean. 

Alvin, a human occupied vehicle (HOV), returns to the ship after a dive.
A remotely operated vehicle (ROV) recovers a volcano monitor from an underwater observatory.This autonomous operated vehicle will map areas of seafloor earthquakes.On May 31, 2009, this robotic vehicle reached the deepest part of the ocean.