Islamic Republic of Iran Navy
It is charged with the responsibility of forming Iran's first line of defense in the Gulf of Oman and beyond with the mission of acting as an effective blue-water navy. However, it is generally considered as a conventional green-water navy as it mostly operates at a regional level, in the Persian Gulf and Gulf of Oman but also as far afield as the Red Sea, the Mediterranean Sea and northwest quarter of the Indian Ocean. In July 2016, the Navy said that it would establish a presence in the Atlantic Ocean, of unspecified duration.
2004 Iranian seizure of Royal Navy personnel
They were released unharmed three days later, on 24 June, after the British and Iranian governments agreed there had been a misunderstanding. Their equipment was not returned and a rigid inflatable boat (RIB) was put on display in a museum in Tehran. During their detention, according to former detainee Marine Scott Fallon, they endured a mock execution in which they were marched into the desert and made to stand blindfolded in front of a ditch while their captors cocked their weapons. They also appeared blindfolded on Iranian TV, where they were forced to apologise for their "mistake". The Royal Navy boats were operating close to the northern coast of the Persian Gulf in the mouth of the Shatt al-Arab waterway which divides southern Iran and Iraq. The weather was bad causing negligible visibility which may have contributed to a potential crossing of the Iranian border by the Royal Navy. After the crew were returned and events analysed the British government affirmed its belief that the personnel were actually still in Iraqi waters, however they consigned the incident to a misunderstanding and requested the return of the equipment. In 2015, an FOIA request released a redacted report.