onboard

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

最开始的引擎是涡轮喷射式，目前已淘汰；然后是涡轮螺旋桨式引擎，现在仍可在小上看到。

2.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.

测量船配备有C-和 S-波段的单脉冲跟踪雷达，激光测距经纬仪和跟踪系统，测速系统和舰载计算去跟踪和控制宇宙船。

3.Onboard aircraft were of mainly the floatplane type.They were stored above deck, usually within the center region of the ship on a small catapult used to launch the aircraft into the air.

（大意）这些舰载大部分都是水上，平时放置于船舯甲板上的弹射器以便弹射至空中。