OACI english exam

[manucordier]

Hi,

I am practicing to present the OACI english exam and I was wondering what does this mean :

"Jumbo is 5 ahead"

Is it 5 minutes, 5 nautical miles or does that just mean "ahead of you" ?

Also, does anyone know a free website providing listening and reading to help prepare this exam ?

( I am currently practicing with this french website: http://www.developpement-durable.gouv.fr/Information-Importante,13975.html )

Thanks a lot.