Complex sentence: On 27 December 2011, the carrier "John C. Stennis" concluded a four-day port visit to Jebel Ali, United Arab Emirates and transited through the Strait of Hormuz to the North Arabian Sea to provide combat air support to coalition ground forces in Afghanistan.
Split into simpler sentences: On 27 December 2011, "Stennis" concluded a four-day port visit to Jebel Ali in the United Arab Emirates. It then steamed through the Strait of Hormuz to the North Arabian Sea to provide combat air support to coalition ground forces in Afghanistan.