History of manned submersibles; Alvin is the only US submarine left that can reach 4,000 meters.
Image ID: nur09526, Voyage To Inner Space - Exploring the Seas With NOAA Collect Credit: OAR/National Undersea Research Program (NURP) • High Resolution Photo Available
Publication of the U.S. Department of Commerce, National Oceanic & Atmospheric Adminstration (NOAA), NOAA Central Library NOAA Privacy Policy | NOAA Disclaimer Last Updated: April 23, 2007