Autonomous craft explores the deep.A 30-foot unmanned underwater vehicle developed by Penn State's Applied Research Laboratory is performing an array of underwater tasks for the Navy. This improved version of the Seahorse is powered by more than 9,000 standard D alkaline batteries Alkaline batteries are a type of power cell dependent upon the reaction between zinc and manganese dioxide (Zn/MnO2). Compared with original zinc-carbon batteries, while both produce approximately 1. . The craft, which can cruise at a depth of 1,000 feet, has been successfully tested in Lake Erie Lake Erie Great Lake; once so polluted, referred to as Lake Eerie. [Am. Hist.: NCE, 887] See : Filth and the Bahamas. In the second exercise, Seahorse was launched from a Trident submarine missile tube. The autonomous craft has collected oceanographic data and probed the ocean depths for simulated mines. The Seahorse was designed to replace tethered Attached to a data or power source by wire or fiber. Contrast with untethered. platforms, which among other shortcomings A shortcoming is a character flaw. Shortcomings may also be:
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