Model of TEKTITE I, last of Navy's habitats, conducted a 60 day mission in 1969.

LA CHALUPA, built in 1972, now operates as an undersea hotel off Key Largo, FL.

Aquanaut works at computer inside AQUARIUS.

AQUARIUS, deployed in 1986 off St. Croix, due to dedication of Sen. L. Weicker.

SEALAB II built on SEALAB I, e.g., multiple chambers & dedicated support ship.

Snorkeler visits the Marine Resources Lab now in a lagoon off Key Largo, FL.

Marine Resources Undersea Laboratory is open for education and public visits.

Mar. Resources Lab entry lock is an acryllic sphere.

EDALHAB was built and operated through an industry/academia partnership.

Bunk room of AQUARIUS, sleeps six.

HYDROLAB home to over 700 aquanauts from 1966-1985.

Aquanaut enters the wet porch of AQUARIUS.

HYDROLAB in Salt River Canyon off St. Croix.

Aquanauts deploy experiment outside HYDROLAB.

Wet porch entry to HYDROLAB, way station in background.

Aquanauts relax inside HYDROLAB; held 4 but only 3 could sleep at one time.

HYDROLAB scientists conducted coral reef studies not possible from the surface.

J. Perry, HYDROLAB builder, swims away from the lab.

HYDROLAB was the only habitat to operate at one atmosphere.

In HYDROLAB's twenty years, no serious hyperbaric accidents occurred.

During a storm, HYDROLAB once broke loose and floated 25 miles away.

Tank rack and gazebo deck outside AQUARIUS.

HYDROLAB's success lay in the simple design and expert support personnel.

Inside HYDROLAB, only 8 x 16 ft., the head (toilet) was outside.

HYDROLAB scientists were among the first to note die-off of the Diadema urchin.

EDALHAB during the FLARE project off FL used ALVIN's support ship, Lulu.

AQUARIUS in 1989 -- only operational offshore habitat now dedicated to science.

Aquanauts excurt (saturation dive) from TEKTITE I.

HUGO underwater observatory monitors Loihi subsea volcano off Hawaii.

Pressure pot carries materials down to AQUARIUS.

AQUARIUS featured on cover of Sea Technology prior to 1986 deployment.

AQUARIUS deployed in Salt River Canyon off St. Croix.

AQUARIUS sits in 60 feet of water at Conch Reef, Key Largo, FL.

AQUARIUS technician communicates with the shore base to relay life support data.

In the AQUARIUS main lock looking aft towards the entry lock.

AQUARIUS tank rack and gazebo deck serves as the starting point for excursions.

AQUARIUS scientist adjusts coral feeding experiment controlled in habitat.

AQUARIUS aquanauts discuss dive plan during coral feeding study.

AQUARIUS lowered to its first home off St. Croix, 1986.

AQUARIUS ops: talk bubbles provide remote air, comms and equipment drop points.

AQUARIUS aquanauts pause to converse in talk bubble.

AQUARIUS aboard transport barge on its way to St. Croix in 1986.

AQUARIUS post-hurricane Hugo-- 6 feet of sand scoured from beneath leg.

AQUARIUS post-hurricane Hugo-- 6 feet of sand scoured from beneath leg.

AQUARIUS post-hurricane Hugo-- 6 feet of sand scoured from beneath leg.

AQUARIUS watch desk keeps 24 hr. watch on saturation operations.

AQUARIUS, built in Texas, en route to St. Croix in 1986.

AQUARIUS breaks the surface during 1990 recovery from Salt R. Canyon.

Doc Schane communicates with AQUARIUS aquanauts during decompression.

Support diver secures AQUARIUS to the seafloor off Key Largo.