Its four cameras also help to keep track of whereabouts on the hull the machine is.
这里的whereabouts应该是名词才对,为什么要提到前面去呢?仿佛引导了宾语从句,该句话是否有误?
这句话是对的,whereabouts在此是副词,不是名词(请查字典)。
whereabouts作副词引导出名词从句(功能与where是一样的),作keep track of的宾语。即原疑问句可能是:
whereabouts is the machine(on the hull)?