The Vertol 107 was the first version of the tandem rotor helicopter which evolved from the 1950s to today's CH-46E Sea Knight.The CH-46 Sea Knight tandem rotor helicopter is used by the U.S. Navy and Marine Corps and other nations including Canada, Sweden, Japan, and Saudi Arabia. It has been serving customers around the world for more than 40 years. It has a straighter, more-compact fuselage than the Army Chinook, and can take off from water or land. Its U.S. Navy missions include vertical replenishment, vertical on-board delivery, search and rescue, medical evacuation, combat support, special warfare and general utility. The Marine Corps mission for the CH-46E includes combat assault, SAR, medevac, and movement of troops, ammunition, supplies and equipment on the battlefield.