According to the screens in the Citadel orbital security stations, the Separatist shuttle that R2-D2 commands is an escort shuttle, class type B.

根据堡垒中轨道安检站屏幕显示，R2-D2指挥的分离主义穿梭机是一艘护航穿梭机，型号为B。

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And it's not just a way to get from point Ato point B. For some people, stations on the city's 12 subway lines are adestination.

而且地铁不仅是一种交通工具，对于某些人来说，墨西哥城12条地铁线路中的站点本身就是他们的旅游目的地。

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But like radar technology, ADS-B currently relies on ground stations to relay information, making it useless over remote areas.

BBC: The key to preventing lost planes