Tasnim |Hossein Zohrvand: Iranian naval forces on Fri. started massive three-day naval drills, codenamed Velayat 97, in the Sea of Oman and the Indian Ocean with the participation of home-grown, recently unveiled Fateh submarine and Sahand destroyer. The following photos show part of the large-scale exercises in Makran coastal areas on the Persian Gulf and Sea of Oman.