惯性导航系统所提供方位角的基准为（）。

（ ） is a publication issued by or with the authority of a state and containing aeronautical information of a lasting character essential to air navigation.

The abbreviation of “Significant Meteorological Information” is （ ） .

Airways are formed by a line connecting one （ ） to another.

DME distance is usually used as （ ） distance unless the aircraft is very close to the station.

“The distance from XX DME” means （ ） .

“Weather phenomenon” means （ ） .

As altitude increases, the temperature of the air （ ） .

The simplest barometer is the （ ） barometer.

“Starboard engine” means （ ） .

“Port engine” means （ ） .