The Weapons and Tactics Instructor Course (WTI) is a seven week period of instruction, hosted by Marine Aviation Weapons and Tactics Squadron One at Yuma, Ariz., that incorporates Marine Corps planning and implementation of advanced air and ground tactics though a series of escalating evolutions in order to produce certified Weapons and Tactics Instructors. Weapons and Tactics instructors serve as squadron training officers who use their skills to act as aircraft and weapons subject matter experts to provide their units with proper training and evaluation to ensure exceptional combat readiness.