page_title: Piracy
section_title: Self protection measures
hierarchical_section_title: Piracy / Anti-piracy measures / Self protection measures
caption_attribution_description: English: long range acoustic device (LRAD) on board QM2
context_page_description: Piracy is an act of robbery or criminal violence by ship or boat-borne attackers upon another ship or a coastal area, typically with the goal of stealing cargo and other valuable items or properties. Those who engage in acts of piracy are called pirates, while dedicated ships that are used by them are called pirate ships. The earliest documented instances of piracy were in the 14th century BC, when the Sea Peoples, a group of ocean raiders, attacked the ships of the Aegean and Mediterranean civilizations. Narrow channels which funnel shipping into predictable routes have long created opportunities for piracy, as well as for privateering and commerce raiding. Historic examples include the waters of Gibraltar, the Strait of Malacca, Madagascar, the Gulf of Aden, and the English Channel, whose geographic structures facilitated pirate attacks. A land-based parallel is the ambushing of travelers by bandits and brigands in highways and mountain passes. Privateering uses similar methods to piracy, but the captain acts under orders of the state authorizing the capture of merchant ships belonging to an enemy nation, making it a legitimate form of war-like activity by non-state actors.
context_section_description: First and foremost, the best protection against pirates is simply to avoid encountering them. This can be accomplished by using tools such as radar, or by using specialised systems that use shorter wavelengths (as small boats are not always picked up by radar). An example of a specialised system is WatchStander.
  In addition, while the non-wartime 20th century tradition has been for merchant vessels not to be armed, the U.S. Government has recently changed the rules so that it is now "best practice" for vessels to embark a team of armed private security guards. The guards are usually supplied from ships intended specifically for training and supplying such armed personnel. The crew can be given weapons training, and warning shots can be fired legally in international waters.
  Other measures vessels can take to protect themselves against piracy are air-pressurised boat stopping systems which can fire a variety of vessel-disabling projectiles,  implementing a high freewall and vessel boarding protection systems (e.g., hot water wall, electricity-charged water wall, automated fire monitor, slippery foam). Ships can also attempt to protect themselves using their Automatic Identification Systems (AIS). Every ship over 300 tons carries a transponder supplying both information about the ship itself and its movements. Any unexpected change in this information can attract attention. Previously this data could only be picked up if there was a nearby ship, thus rendering single ships vulnerable. However, special satellites have been launched recently that are now able to detect and retransmit this data. Large ships cannot therefore be hijacked without being detected. This can act as a deterrent to attempts to either hijack the entire ship or steal large portions of cargo with another ship since an escort can be sent more quickly than might otherwise have been the case.
caption: An LRAD sound cannon mounted on RMS Queen Mary 2
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