Underwater Technology

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CRRF is involved in developing and exploiting new underwater technology in support of our research activities. CRRF has developed a successful closed circuit electronic diving rebreather, called the Science Lung II, which has been used for work to depths as great as 150 m (500 feet). A new generation unit (Science Lung III) is presently in advanced development. CRRF is developing a second generation autonomous underwater video monitoring system for remote documentation of biological and oceanographic phenomena. Building on a successful prototype unit constructed in the early 1990's the new system should find ready application in monitoring fish populations, spawning aggregations, cleaning stations, and any other application that can make use of a video image obtained without human presence or connection to the surface.


CRRF's Director, Dr. Patrick Colin,
using the Science Lung II

Camera housings are constructed to withstand the pressures experienced during deep dives using the Science Lung II.

Checking DeepWorker 2000
systems prior to a dive


CRRF has utilized the Deepworker 2000 one-person submersible for marine natural product collections, the first such collections made using such vehicles in the Indo-west Pacific, adding an autofocus macrophotography capability to the submersible for the project. CRRF staff were trained on the Deepworker system and piloted the sub for our collection work. In addition to the collection of new samples for screening, many new species were discovered.


Diving deeper in the

Thermographs - Onset Hobo pro thermograph/data loggers are placed in specially constructed housings and deployed as deep as 150 meters.

Autonomous underwater video monitoring system (AUVS) deployed on the reef, Palau.

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