onboard

First came the turbojet, now obsolete, then the turboprop, which is still found onboard small planes.

最开始的引擎是涡式，目前已淘汰；然后是涡螺旋桨式引擎，现在仍可在飞机上看到。

The ships are fitted with C- and S-band monopulse tracking radar, Cinetheodolite laser ranging and tracking system, velocimetry system, and onboard computers to track and control the spacecraft.

量船配备有C-和 S-波段的单脉冲跟踪雷达，距经纬仪和跟踪系统，速系统和舰载计算机去跟踪和控制宇宙飞船。