“The Pacific territory of Palau earlier this year declared no commercial fishing would take place in its 200 nautical mile Exclusive Economic Zone. … The country currently uses a Cessna Skymaster, and has also explored the use of unmanned drones, to patrol the fishing zone which is roughly the size of France. … Todd Kleperis of Liquid Robotics International says the wave and solar powered skimmer is a much cheaper option.”

Source: www.abc.net.au

Courtesy of J. Ong in a reply to:

http://robohub.org/drones-against-illegal-fishing/