The number of terrorist attacks at sea has been minuscule as a proportion of terrorist attacks overall.! According to the RAND Corporation's Terrorism Chronology Database and the RAND-MIPT Terrorism Incident Database, incidents of maritime terrorism account for only 2% of all the terrorism incidents recorded over the past 30 years. 2 This is because the conditions necessary for a successful terrorist attack can be fulfilled on water only with difficulty. Terrorists have not operated at sea to any great extent so far because they can operate more easily and effectively on land. For the majority of terrorist groups operating today, maritime activity is unnecessary; there are only a few groups for whom maritime operations are driven by a strategic or operational imperative.