Benthic crawlers are subea vehicles that crawl on the seafloor and carry out detailed investigations of processes influencing gas hydrates evolution at the seafloor.
Two Benthic Crawlers, Wally I and Wally II, have been deployed in Barkley Canyon hydrates. Developed by a team based at Jacobs University in Bremen, Germany, the suite of sensors mounted on Wally typically includes cameras, a compass, methane sensors, current meter, CTD, fluorometer, and turbidity meter. Wally crawls on dual tractor treads, which allow a full range of forward, backward and turning movement. Including the titanium frame, drive motors, sealed electronics chambers, wiring, lights, HD video camera, and sensors, its out-of-water weight is 275 kg. With syntactic foam floatation blocks attached, this is reduced to an in-water weight of 40 kg.
Individual instruments of the above category, which are (or have been) connected to our observatories. Click an instrument for detailed information.
Click the instrument categories below for descriptions and lists of instruments belonging to that category.