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Rod Catanach testing Sentry down at the WHOI dock.

Sentry on the Horizon

Engineer Rod Catanach steadies the Sentry autonomous underwater vehicle as it is lowered for tests off the WHOI dock in November 2007. Sentry is a robot built for exploring the deep ocean; it will often be used to complement Alvin by surveying large swaths of ocean floor to determine the best spots for close-up exploration. The AUV is slated to join the National Deep Submergence Facility in 2008. (Photo by Tom Kleindinst, Woods Hole Oceanographic Institution)


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