1. THIS MARAD ADVISORY PROVIDES INFORMATION ON THE RISK TO VESSELS TRANSITING THE HIGH RISK WATERS (HRW) OF THE GULF OF ADEN (GOA), RED SEA, INDIAN OCEAN, ARABIAN SEA AND WATERS OFF THE HORN OF AFRICA (SOMALIA). 2. THIS ADVISORY WILL BE PUBLISHED ON THE MARAD WEB SITE AT WWW.MARAD.DOT.GOV UNDER THE HORN OF AFRICA PIRACY PORTAL AND ON THE US COAST GUARD HOMEPORT SITE AT HOMEPORT.USCG.MIL/PIRACY. OTHER PERTINENT INFORMATION IS ALSO POSTED ON THESE WEB SITES. 3. U.S.-FLAG OPERATORS WITH SHIPS IN THE AFFECTED AREAS ARE REQUESTED TO FORWARD THIS ADVISORY TO THEIR SHIPS BY THE MOST EXPEDITIOUS MEANS. 4. U.S.- FLAG SHIPS OPERATING IN HRW ARE REQUIRED TO COMPLY WITH US COAST GUARD MARITIME SECURITY (MARSEC) DIRECTIVE 104-6 (CURRENT VERSION).