Guardafui Channel in the context of "Horn of Africa"

The Arabian Sea (Arabic: بَحرُ ٱلْعَرَبْ, romanized: baḥr al-ʿarab) is a region of sea in the northern Indian Ocean, bounded on the west by the Arabian Peninsula, Gulf of Aden and Guardafui Channel, on the northwest by Gulf of Oman and Iran, on the north by Pakistan, on the east by India, and on the southeast by the Laccadive Sea and the Maldives, on the southwest by Somalia. Its total area is 3,862,000 km (1,491,000 sq mi) and its maximum depth is 5,395 meters (17,700 feet). The Gulf of Aden in the west connects the Arabian Sea to the Red Sea through the strait of Bab-el-Mandeb, and the Gulf of Oman is in the northwest, connecting it to the Persian Gulf.

The Gulf of Aden (Arabic: خليج عدن; Somali: Gacanka Cadmeed) is a deepwater gulf of the Indian Ocean between Yemen to the north, the Arabian Sea to the east, Djibouti to the west, and the Guardafui Channel, the Socotra Archipelago, Puntland in Somalia and Somaliland to the south. In the northwest, it connects with the Red Sea through the Bab-el-Mandeb strait, and it connects with the Arabian Sea to the east. To the west, it narrows into the Gulf of Tadjoura in Djibouti. The Aden Ridge lies along the middle of the gulf, and tectonic activity at the ridge is causing the gulf to widen by about 15 mm (0.59 in) per year.

The ancient Greeks regarded the gulf as one of the most important parts of the "Erythraean Sea". It later came to be dominated by Muslims, as the area around the gulf converted to Islam. From the late 1960s onwards, there was an increased Soviet naval presence in the Gulf. The importance of the Gulf of Aden declined while the Suez Canal was closed, but it was revitalized when the canal was reopened in 1975, after being deepened and widened by the Egyptian government.

Puntland, officially the Puntland State of Somalia, is a semi-autonomous state that considers itself to be part of Somalia, despite not accepting the legitimacy of Somalia's current governing administration. It was formed in 1998, and is a federal member state of Somalia. Puntland is located in the northeast of Somalia. Its capital is the city of Garoowe in the Nugal region. The region had a population of 4,334,633 in 2016.

Puntland is bordered by Somaliland to its west, the Gulf of Aden in the north, the Guardafui Channel in the northeast, the Indian Ocean, Galmudug State in the south, and Ethiopia in the southwest. There are several major geographical apexes in Puntland, including the Cape Guardafui, which forms the tip of the Horn of Africa, Ras Hafun the easternmost place on the entire African continent, and the beginning of the Karkaar mountain range.

Yemen is located in West Asia, at the southern tip of the Arabian Peninsula, between Oman and Saudi Arabia. It is situated at the entrance to the Bab-el-Mandeb Strait, which links the Red Sea to the Indian Ocean (via the Gulf of Aden) and is one of the most active and strategic shipping lanes in the world. Yemen has an area of 455,503 square kilometres (175,871 sq mi), including the islands of Perim at the southern end of the Red Sea and Socotra at the entrance to the Gulf of Aden. Yemen's land boundaries total 1,746 kilometres (1,085 mi). Yemen borders Saudi Arabia to the north (1,458 km or 906 mi) and Oman to the northeast (288 km or 179 mi). Through the Socotra island, Yemen also shares borders with the Guardafui Channel and the Somali Sea.

Operation Ocean Shield was NATO's anti-Piracy in Somalia initiative in the Indian Ocean, Guardafui Channel, Gulf of Aden and Arabian Sea. It follows the earlier Operation Allied Protector. Naval operations began on 17 August 2009 after being approved by the North Atlantic Council, and were terminated on 15 December 2016 by NATO. Operation Ocean Shield focused on protecting the ships of Operation Allied Provider [de; no; ru; uk], which transported relief supplies as part of the World Food Programme's mission in the region. The initiative also helped strengthen the navies and coast guards of regional states to assist in countering pirate attacks. Notably, the Italian Military Support Base in Djibouti contributed, utilizing naval vessels such as the Italian Francesco Mimbelli and San Marco in the Gulf of Aden, Indian Ocean, and off the coast of Somalia. Additionally, China, Japan, and South Korea sent warships to participate in these activities.

The United States Navy was the largest contributor of ships, followed by the Indian Navy. The taskforce was composed of ships from the contributing navies, led by a designated leadship. The role of leadship was rotated among the various countries involved.

Piracy off the coast of Somalia occurs in the Gulf of Aden, Guardafui Channel, and Indian Ocean, in Somali territorial waters and other surrounding places and has a long troubled history with different perspectives from different communities. It was initially a threat to international fishing vessels during the early 2000s, only to rapidly escalate and expand to international shipping during the War in Somalia (2006–2009). The escalation of conflict between local Somali fishermen and foreign vessels occurred in a context where Somalia is estimated to lose approximately $300 million annually since 1991 due to the unauthorized extraction of marine resources using harmful methods, such as dynamite fishing, which is prohibited in a number of other regions.

Coastal Somali communities report that the conflict originated from their need to defend themselves against foreign trawlers, which they allege steal fish and restrict access to traditional fishing grounds. They also claim that the dumping of toxic and nuclear waste from Europe into their waters has resulted in severe environmental damage, including the death of children. Although several narratives exist surrounding this phenomenon, the coastal groups refer to themselves as the "people's coastguard", and this self-designation is widely recognized.

Socotra, locally known as Saqatri, is a Yemeni island in the Indian Ocean. Situated between the Guardafui Channel and the Arabian Sea near major shipping routes. The largest of the six islands in the Socotra archipelago, it comprises around 95% of the landmass of the archipelago. It lies 380 kilometres (205 nautical miles) south of the Arabian Peninsula and 232 km (125 nmi) east of the Horn of Africa. The inhabitants of the island are called Socotrans, and they speak Arabic and Soqotri.

Socotra is home to a high number of unique species that are endemic. Up to a third of its plant life is unique. Due to the island's unusual geography, it has been described as "the most alien-looking place on Earth". The island measures 132 km (82 mi) in length and 42 km (26 mi) across at its widest. In 2008, Socotra was recognised as a UNESCO World Heritage Site.