相关题目
（ ） is the visibility forward from the cockpit of an aircraft in flight.
（ ） is specified information provided to air traffic services units, relative to an intended flight or portion of a flight of an aircraft.
The flight plan as filed with an ATS unit by the pilot or his designated representative, without any subsequent changes is called （ ） .
（ ） is the pilot responsible for the operation and safety of the aircraft during flight time.
（ ） is a power-driven heavier-than-air aircraft, deriving its lift in flight chiefly from aerodynamic reactions on surfaces which remain fixed under given conditions of flight.
（ ） is a group of letters, figures or a combination thereof which is either identical to, or the coded equivalent of, the A/C call sign to be used in air-ground communications, and which is used to identify the A/C in ground-ground air traffic services communications.
（ ） is a group of alphanumeric characters used to identify an aircraft in air-ground communication.
（ ） is a publication issued by or with the authority of a State and containing aeronautical information of a lasting character essential to air navigation.
（ ） is an office designated by a State for the exchange of NOTAM internationally.
（ ） is a unit established for the purpose of receiving reports concerning air traffic services and flight plans submitted before departure.
