Technical diver, using mixed gases to dive to 60 meters, decompresses. Diver carries samples to the surface. 1975 August 218. Divers use a two person diver propulsion vehicle. Black durgen removed from its shelter.
Divers adjust micromanipulator used to sample close to coral heads.
Aquanauts change out tanks near the Aquarius undersea laboratory. St. Croix, USVI 222. Captured reef fish are tagged and released. 1984 August 223. Diver conducts point counts of reef fish.