Maritime insurgency presents a far greater challenge to world naval forces than random acts of terrorism at sea.
Maritime terrorism is not a serious threat. Acts of terrorism at or from the sea, that is to say acts of violence committed by politically motivated groups to inspire their supporters or induce feelings of fear among their enemies, have been rare and are likely to remain so. Insurgent groups do, however, use the sea. The maritime domain might offer few opportunities for terrorist acts but some insurgent groups have used it extensively.