The Maritime Security Patrol Area (MSPA) is specified patrol zone in the Gulf of Aden. Its borders are unmarked, but are a narrow, rectangular corridor between Somalia and Yemen, within the northern sector of the gulf. The MSPA was established 22 August 2008 by the Combined Task Force 150, (CTF-150) a multinational, coalition naval task force in order to deter de-stabilizing activities, including piracy within this maritime geographical area. The establishment of the MSPA was directed by the Commander, United States Naval Central Command.