What is the most active, long term, deep diving, manned submersible used for studying the seafloor and deep ocean depths?
A)Alvin
B)Nautilus
C)Simon
D)Theodore

Question

Quizplus · Accepted Answer

Alvin is the most active, long term, deep diving, manned submersible used for studying the seafloor and deep ocean depths. It has been in operation since 1964 and is still in use today, undergoing continuous upgrades and modernizations. Alvin has been used in many significant scientific research expeditions, including exploring the wreck of the Titanic and discovering hydrothermal vents on the ocean floor. Nautilus is also a deep sea exploration vessel but it is an unmanned remotely operated vehicle (ROV) and not a manned submersible like Alvin. Simon and Theodore are fictional characters, not related to deep-sea exploration.

What Is the Most Active, Long Term, Deep Diving, Manned