Maritime threats:
the International Maritime Bureau continues to report the territorial waters of littoral states and offshore waters as high risk for piracy and armed robbery against ships, particularly in the Gulf of Aden, along the east coast of Africa, the Bay of Bengal, and the Strait of Malacca; the presence of several naval task forces in the Gulf of Aden and additional anti-piracy measures on the part of ship operators, including the use of on-board armed security teams, have reduced incidents of piracy; in response, Somali-based pirates, using hijacked fishing trawlers as "mother ships" to extend their range, shifted operations as far south as the Mozambique Channel, eastward to the vicinity of the Maldives, and northeastward to the Strait of Hormuz; 2018 saw a slight decrease in attacks over 2017, with one incident in the Gulf of Aden, none in the Red Sea, and two off the coast of Somalia; Operation Ocean Shield, the NATO naval task force established in 2009 to combat Somali piracy, concluded its operations in December 2016 as a result of the drop in reported incidents over the last few years; the EU naval mission, Operation ATALANTA, continues its operations in the Gulf of Aden and Indian Ocean through 2020; naval units from Japan, India, and China also operate in conjunction with EU forces; China has established a logistical base in Djibouti to support its deployed naval units in the Horn of Africa

the Maritime Administration of the US Department of Transportation has issued a Maritime Advisory (2019-012-Persian Gulf, Strait of Hormuz, Gulf of Oman, Arabian Sea, Red Sea-Threats to US and International Shipping from Iran) effective 7 August 2019, which states in part that "heightened military activities and increased political tensions in this region continue to present risk to commercial shipping...there is a continued possibility that Iran and/or its regional proxies could take actions against US and partner interests in the region;" at present, Iran has seized two foreign-flagged tankers in the Persian Gulf; the US and UK navies have established Operation Sentinel to provide escorts for commercial shipping transiting the Persian Gulf, Strait of Hormuz, and Gulf of Oman