The Boeing 747-400 series has made significant improvements on the basis of the Boeing 747-300 model, and is an improved and extended range version of the 747-300. In 1985, the B747-400 program was officially launched, with the installation of new electronic instrument equipment and the use of more powerful engines.The Boeing 747-400 aircraft is a four engine long range wide body transport aircraft and a wide body passenger aircraft produced by Boeing, featuring a double decker cabin and unique exterior design. The 747-300 three person analog cockpit is changed to a two person digital cockpit, which requires only two pilots and no Flight Engineer.In April 2021, the Boeing 747-400 large cargo plane was officially named the Boeing 747 Dreamliner.