Several business aircraft, regional jets and helicopters certified for instrumentflightrules are included in this certification.
这次论证包括根据仪器飞行规则所鉴定的几架商业飞机、地域性飞机和直升机。
2
The Shaanxi Y-8 twin-turboprop, reverse-engineered from the Antonov An-12, is the platform for the development of airborne early warning, electronic intelligence and instrumentflightrules aircraft.
陕西Y-8双涡轮旋浆飞机，安托诺夫An-12反工程版，成为预警机平台，电子情报和仪器飞航规则飞机。
3
A civil aircraft performing instrumentflight shall observe instrumentflightrules.