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The Hoot (Persian: حوت; Whale) is an Iranian supercavitation torpedo claimed to travel at approximately 360 km/h (220 mph), several times faster than a conventional torpedo. It was claimed to have been successfully test-fired from a surface ship against a dummy submarine during the Iranian military exercise "Great Prophet" (پيامبر اعظم) on 2 April 2006 and 3 April 2006. Iran test-fired the torpedo within its territorial waters in the Strait of Hormuz in May 2017.