Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Bell UH-1Y Venom (also called Super Huey) is a twin-engine medium size utility helicopter, part of the United States Marine Corps'' H-1 upgrade program. The helicopter is also called Yankee for its variant letter. The UH-1Y is currently in low-rate production to replace the USMC''s aging fleet of UH-1N Twin Huey light utility helicopters first introduced in the early 1970s. The UH-1Y was to have been remanufactured from UH-1Ns, but in 2005 it was approved for the aircraft to be built as new. In 1996, the USMC launched the H-1 upgrade program by signing a contract with Bell Helicopter for upgrading 100 UH-1Ns into UH-1Ys and upgrading 180 AH-1Ws into AH-1Zs. The H-1 program created completely modernized attack and utility helicopters with considerable design commonality to reduce operating costs.