In the icao framework , the world area forecast system wafs provides meteorological authorities and authorized users with aeronautical weather information required for international air navigation , such as aeronautical weather messages in text format and weather charts 在国际民用航空组织架构下，世界区域预报系统wafs为各气象部门及认可用户提供国际航空所需的航空气象资料，包括文字形式的飞行气象情报和天气图等。
In the icao framework , the world area forecast system ( wafs ) provides meteorological authorities and authorized users with aeronautical weather information required for international air navigation , such as aeronautical weather messages in text format and weather charts 在国际民用航空组织架构下，世界区域预报系统( wafs )为各气象部门及认可用户提供国际航空所需的航空气象资料，包括文字形式的飞行气象情报和天气图等。
Pilots can elect to receive the hong kong atis and volmet voice broadcast when the aircraft is within the vhf and high frequencymedium frequency ( hfmf ) coverages respectively , or retrieve the full script of the atis and volmet broadcast from their airborne data communications system via the sita aircom network 飞行员可以选择当飞机在甚高频和高频中频覆盖范围内，分别收听自动航站情报和远航气象情报的语音广播，又或者透过国际航空电讯公司的网络，在飞机上把广播讯息全文列印出来。
So far , work has progressed in a satisfactory manner . trials have been conducted for automatic dependent surveillance ( ads ) , controller - pilot data link communications ( cpdlc ) , satellite communications ( satcom ) , aeronautical telecommunication network ( atn ) , digital - automatic terminal information services ( d - atis ) and digital - meteorological information for aircraft in flight ( d - volmet ) , pre - departure clearance ( pdc ) delivery via data link , etc . encouraging results and favourable feedback from pilots and airlines have been received 到目前为止，各项工作均进展顺利。自动从属监察系统、管制员和飞行员用数据链路作通讯的系统、卫星通讯、航空通讯网络、数据化自动航站情报服务及数据化远航气象情报服务、经数据链路发放起飞前放行指示等服务都已经过试行运作，效果令人鼓舞，备受飞行员和航空公司推许。
