Beginning in late 1979, CTF 77 also focused on the carrier presence on Gonzo Station in the Indian Ocean and the Gulf of Oman off of Iran following the Iranian Revolution and the subsequent Iran Hostage Crisis involving the detention of the American Embassy staff in Teheran from November 1979 to January 1981. With the release of the American hostages in 1981, carrier presence off Gonzo Station decreased and CTF 77/CCG-5/CTF 70 returned again to its deterrence posture, primarily as it pertained to Soviet Navy operations in the Western Pacific. CTF 77/CCG-5/CTF 70 operated two and three Carrier Battle Groups from the North Arabian Sea to the North Sea of Japan and the North Pacific Ocean.