Here are two links regarding a yacht seized off Somalia.
http://www.noonsite.com/Members/sue/R2008-09-08-3/view
http://www.noonsite.com/Members/sue/R2008-09-08-2
Please be cautious when dealing with other mariners in distress. The same principles governing helping people in distress on land (and scuba diving) should come into play - ensure you don't become a victim also.
Render assistance, just be smart and safe about it.