The CH-46 "Sea Knight" transport helicopter first flew in 1958, and officially entered service with the U.S. Navy in 1960, serving as a transport material. Personnel and other tasks·Although it is not a special operations aircraft, it often performs some special operations. The CH-46 helicopter is one of the most important combat attack helicopters of the U.S. Marine Corps. This helicopter looks a bit like a bus and has twin propellers. The Marine Corps mainly uses it to transport troops from ships to shore, or to transport troops from camps. Transported to the combat forward position. The U.S. Navy uses this helicopter to transport equipment to ships or perform search and rescue missions.