In 1983, the MSC (Maritime Safety Committee) at the IMO, reviewed the situation concerning Piracy. Legal problems encountered were such that attacks in a home port or within Territorial waters were not considered Acts of Piracy and were subject to treatment by local law as armed robbery. This led to the establishment of 'Piracy and Armed Robbery Against Ships' as a work in progress amongst the concerned IMO committee's.
Piracy and armed robery against yachts continue to be a hazard in some parts of the World. A list of Piracy Reports can be found in the following link http://www.noonsite.com/General/Piracy
For further information ISAF recomends visiting the links below.
Piracy Best Management Practices to Deter Piracy in the Gulf of Aden and off the Coast of Somalia
Maritime Security Centre
ICC Weekly Piracy Report
Interational Maritime Organiation
IMB Live Piracy Map