Until now the only aircraft which have been available for the Airborne Early Warning (AEW) role have been large, complex and extremely expensive systems such as the Boeing E3A Sentry and the Grumman E2C Hawkeye.

• 至今，可用来起机载预测作用的仅有的飞机一直是大型、复杂并且极其昂贵的系统，比如波音E3A卫兵和格鲁门E2C鹰眼。