The new Ship Security and Alert Systems (SSAS) regulations were adopted by International Maritime Organization (IMO) to enhance maritime security in response to the increasing threat from terrorism and piracy. After July 1, 2004, most deep-sea passenger and cargo ships must be fitted with a device that can send an alert message containing the ship's ID and position whenever the ship is under threat or has been compromised. The distress message must be activated covertly from a switch on the navigation bridge or other shipboard location, and transmitted only to the designated authority without being received on other ships or raising an alarm on the ship under attack.
