The surface warfare insignia is a military badge of the United States Navy which is issued to U.S. Navy personnel who are trained and qualified to perform duties aboard United States surface warships. There are presently four classes of the surface warfare pin, being that of line, staff, special operations, and enlisted. The line and enlisted surface warfare badges may be earned by United States Coast Guard personnel assigned to Navy commands. The various badge types are as follows:The surface warfare officer insignia is the first milestone qualification an eligible commissioned officer may receive in surface warfare. This device is commonly called the "SWO pin" in the U.S. Navy. Those receiving the pin must qualify as officer of the deck (both underway and in port), small boat officer, combat information center watch officer, and must be trained in shipboard engineering, naval history, and damage control. For further, enterprise-level training, officers will attend Surface Warfare Officers' School (SWOS) in Newport, Rhode Island between all sea tours. The surface warfare officer badge is typically a prerequisite for tactical action officer (TAO) training.