Protector (crewless surface watercraft)
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The Protector is an Israeli crewless surface watercraft, developed in 2001. It is equipped with a stabilized gun, electro-optic and radar sensors, and water jet propulsion. The ship is 31 feet in length, and weighs four tons. The craft is also used in Singapore and the USA.
[edit] Source
Bosworth, Michael. "Crewless surface watercraft." McGraw-Hill Yearbook of Science and Technology, 2006.