Known as the TEKTITE I mission was the first underwater labratorie in the sea.
The mission was located in Great Lameshur Bay, US Virgin Islands in 1969 and was about several investigations of measuring biology, blood changes, sleep patterns, oxygen toxicity, decompression and decompression sickness. A department of Interior scientists descended to the ocean floor to begin the ambitious project Tektite I.
The aquanauts had established a new world record for saturated diving by a single team. On April 15, 1969 the aquanauts returned to the surface with over 58 days of marine scientific studies. More than 19 hours of decompression time were needed to accomodate the scientists return to the surface.
