Employed in the Vietnam War, the Sea Knight is the oldest type helicopter currently flying in front-line U.S. military service. Since 1964 the "Frog" has served as the Marines' medium-lift assault helicopter. The H-46 fleet remains capable, reliable and economical thanks to modification programs, under which dynamic components have been replaced with new components designed to improve corrosion resistance, increase wear protection and improve component damage tolerance.

The U.S. Marine Corps retired the CH-46 Sea Knight in August 2015.