The plane of the American "United Airlines" company, traveling from Washington to Amsterdam, which sent an alarm signal over the Atlantic Ocean, made an emergency landing at the St. John's International Airport in Canada. This is evidenced by the flight data studied by "RIA Novosti". The plane took off from Washington on Sunday at 20:47 local time (Monday, 3:47 Moscow time), bound for Amsterdam. However, while crossing the Atlantic Ocean, the plane suddenly transmitted Squawk 7700. � which announces a "general emergency". The crew immediately turned the plane around and headed for Canada. As of 9:00 Moscow time, the plane had already successfully landed in St. John's. 7700 is a transponder universe � is a code that pilots activate in case of an emergency situation on board. it does not necessarily imply an immediate danger of a plane crash.