The medium transport & attack helicopter Chinook developed for the U S Army during the sixties in its most recent versions is also in service with many other armed forces around the world This version has been substantially modified & was designed for special missions of the U S Armed Forces It is a long range version with large tanks originally developed for civilian use The MH-47 is equipped with sophisticated night vision & satellite navigational systems Furthermore the chopper features efficient defence armament based on various machine guns