A parachute tower is a tower used for parachute training, often by members of a military paratroop unit. A mixture of tower heights are used at different stages of training. Trainees typically begin on towers around 35 feet (11 m) in height in fall-arrest harnesses before progressing onto parachute descents from towers that can be in excess of 250 feet (76 m). The use of towers allows trainees to practice their landing technique before jumping from an aircraft.