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| ![]() Surface Transportation
Ship and Pressurization Chamber The next major factor is speed. Since the scientists and crew are working long hours under pressure, they need to be depressurized quickly and brought to shore for rest at the end of each mission. In addition, emergency situations may require swift transportation. As a result both of the engines selected are rated at 1,200 horsepower, giving the ship the ability to make the journey from the shore to the reef rapidly and reliably. The speed in deploying the sub is just as important as the speed of the ship. Since supplies must be routinely transported to the facility, docking was a critical factor in the decision to use a catamaran hull. The pressurization chamber is mounted on the horizontal section that spans the distance between the two sub hulls. Below the pressurization chamber is an airlock capable of docking with the conning tower of the submersible. Thus, on the journey to the reef the submersible lies in a sheltered position between the two sub-hulls. Moreover, once pressurized, the crew can quickly move through the airlock to the vehicle. In case of an emergency the submersible can dock with the airlock and return the injured, but still pressurized, crewmembers to the hyperbaric chamber, where a large space is reserved wholly for emergency medical procedures. Constructed of stainless steel, the hyperbaric chamber is designed to pressurize passengers and cargo to 4.5 atmospheres. The inner volume of 6 cubic meters easily accommodates 6 to 9 people, in addition to tie-up bunk beds and seats along the walls. The pressurization chamber will also contain oxygen breathing units with overboard dumping. Dynamic communication with the crew of the ship will be available. For the safety of the passengers, hyperbaric fire extinguishers and oxygen analysis stations for internal atmosphere precision control are located in the chamber. The hyperbaric chamber has two outlets, both fitted with double safety automatic valves, one at the side for entry from the ship deck and the second on the floor for docking with the submersible. Docking Since the habitat is at ambient pressure 50 meters below sea level and the submersible has already been pressurized to 4.5 atmospheres, such docking procedures between the submersible and the habitat do not take place. Instead, the pilot has to maneuver the submersible such that the conning tower rises above water level in the moon pool of the habitat. Once the pressures are equilibrated, movement between the submersible and the habitat is safe. | ||||||||||||||||||||||
For questions regarding the Atlantis Projects (a.k.a. Mission2005), email our professor, Kip Hodgesor visit the Mission 2005 Web Page. Copyright Massachusetts Institute of Technology. |