Anti-piracy technologies now include robot-crewed ships as the problem of modern-day piracy increases in areas like the Gulf of Aden. In next month’s Yachting Monthly we feature a Learning Curve on what happened to one yacht during a shocking attack by Somali pirates.

Other technologies include a 9000 volt electric fence that when rigged around ship’s deck stops the pirates from boarding, and hidden tagging devices for ships that allow satellites to track craft, acoustic weapons which include a deafening alarm sound.

Marine Robotics have created vessels called Ghost Guard which can patrol the seas along pre-programmed routes, overseen by a single, human controller on shore.

The boats can also escort other ships through dangerous waters. Video and other equipment on board these robotic ships allow their on-shore controllers to see and interact with the crew of any vessels they encounter.