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Dive & Train

A truly unique platform, the Aquarius Reef Base has numerous capabilities, offering many different facilities and ways to get involved.

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The power of the Aquarius lies in its flexibility. Saturation diving gives aquanauts 10 times more bottom time than traditional divers normally have to conduct studies and training. For projects and events requiring more time in the habitat – hours to overnight stays – but with limited time outside, Aquarius offers 1-Atmosphere operations (1ATA), which can accommodate up to six certified divers. Visiting Aquarius for up to an hour using standard scuba diving protocols is also possible.

Technical Capabilities

No matter how the lab is used, continuous power and telecommunications capabilities make Aquarius an ideal platform for research projects, advanced sensor development, longterm monitoring of coastal oceans and coral reefs, and education and outreach. Web cameras operate during missions with cameras inside and outside Aquarius. Live broadcasts (webcasts and special videoconferencing opportunities) are often conducted that involve schools, museums, and aquariums across the country.

  • Saturation Diving Operations
    Using a technique known as saturation diving, six Aquarius aquanauts (including two staff habitat techniciancs) can spend days to weeks under water conducting research that cannot be accomplished anywhere else on the planet. Aquanauts diving from Aquarius can spend nine hours per day to depths of 95 feet with a reduced risk of decompression sickness, making Aquarius safe, efficient and costeffective.

    Missions in Aquarius typically last ten days and aquanaut trainees undergo five days of specialized training before each mission starts. During missions a surfacebased support crew monitors the aquanauts and habitat 24/7 from a watch desk and command center at the shore base. Divers are available round the clock for emergencies and a workboat goes out to the site almost every day.

    Operating Environment

    Aquarius is normally an ambient pressure habitat, which means that the interior atmospheric pressure is equal to the surrounding water pressure. The entryway within the Wet Porch, called the moon pool, remains open as the equal air pressure inside prevents the water from flowing in. The baseplate rests in approximately 62 feet of water, with the habitat mounted off the bottom at a depth of approximately 47 feet (tidal range at the site is between two and three feet). This operating depth is referred to as “hatch depth”. The pressure at 47 feet of seawater is about 2.5 times greater than the atmospheric pressure found at sea level. At this depth and pressure, nonsaturated visitors to Aquarius have less than about 80 minutes to visit and return to the surface before they risk experiencing decompression related illness. However, the mission aquanauts living in Aquarius can stay indefinitely and have nine hours of diving down to about 95 feet each day, with unlimited time at storage depth. At the end of a mission, aquanauts undergo 15 hours and 45 minutes of decompression that is conducted within Aquarius itself, while on the bottom. At the end of decompression, Aquanauts exit Aquarius and scuba dive back to the surface.

    Length of an Aquarius Mission

    Aquarius missions typically last 10 days, but have been as short as three days and as long as 31. We are currently exploring long-duration mission operations that extend beyond 40 days. One of the main benefits of saturation diving is that once you are saturated it doesn't matter if you stay one day, a week, or a month — the decompression time remains the same.

    At the end of missions aquanauts decompress inside Aquarius, where pressure is slowly brought back to one atmosphere (or surface pressure) from the operating depth of about 50 feet — and it takes over 17 hours.

    Aquanauts then “lock–out” and swim to the surface. People sometimes think that Aquarius is brought to the surface during decompression, but it stays on the bottom; it’s the pressure inside Aquarius that is changed.

    Additional Information

  • 1-ATA Diving Operations

    In one atmosphere mode (1ATA), divers enter the habitat, hatches are secured and the internal pressure is returned to surface. Divers are sequestered inside Aquarius and cannot leave until the end of the operation, however, they can communicate with divers on the reef, conduct live videoconferences and experience an extended stay not possible on a single nodecompression dive from the surface. This mode of operation doesn't involve saturation diving and requires only a short training session beforehand. 1ATA operations are especially useful for conducting live education events (e.g., giving a course lecture or hosting multiple outreach events), real-time testing of sensors and equipment where direct interaction and observation is preferred and stable power and Internet connectivity are required, and for project development prior to launching a full saturation mission.

    Additional Information

  • Visits to Aquarius

    Visitors with approved science, education, outreach, research & development and media activities (film and radio) can utilize Aquarius for conducting live education events (e.g., giving a course lecture or hosting multiple outreach events), realtime testing of sensors and equipment where direct interaction and observation is preferred and stable power and Internet connectivity are required, project development prior to launching a full saturation mission and filming science and educational programming.

    Additional Information

Day Boat Operations

Staff-piloted boats are available for projects requiring surface-based operations. Our professional marine science and operations staff can support the following activities:

  • No-decompression diving
  • Educational reef and snorkel trips
  • ROV / AUV activities
  • Surface-based sensor deployment
  • Outreach / media productions

Typical areas of operations extend from Carysfort Reef to Alligator Light. All participants must be a minimum of 18-years old.

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